| Step | Hyp | Ref | Expression | 
						
							| 1 |  | poimir.0 | ⊢ ( 𝜑  →  𝑁  ∈  ℕ ) | 
						
							| 2 |  | poimirlem22.s | ⊢ 𝑆  =  { 𝑡  ∈  ( ( ( ( 0 ..^ 𝐾 )  ↑m  ( 1 ... 𝑁 ) )  ×  { 𝑓  ∣  𝑓 : ( 1 ... 𝑁 ) –1-1-onto→ ( 1 ... 𝑁 ) } )  ×  ( 0 ... 𝑁 ) )  ∣  𝐹  =  ( 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) )  ↦  ⦋ if ( 𝑦  <  ( 2nd  ‘ 𝑡 ) ,  𝑦 ,  ( 𝑦  +  1 ) )  /  𝑗 ⦌ ( ( 1st  ‘ ( 1st  ‘ 𝑡 ) )  ∘f   +  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑡 ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑡 ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) ) } | 
						
							| 3 |  | poimirlem22.1 | ⊢ ( 𝜑  →  𝐹 : ( 0 ... ( 𝑁  −  1 ) ) ⟶ ( ( 0 ... 𝐾 )  ↑m  ( 1 ... 𝑁 ) ) ) | 
						
							| 4 |  | poimirlem22.2 | ⊢ ( 𝜑  →  𝑇  ∈  𝑆 ) | 
						
							| 5 |  | poimirlem22.3 | ⊢ ( ( 𝜑  ∧  𝑛  ∈  ( 1 ... 𝑁 ) )  →  ∃ 𝑝  ∈  ran  𝐹 ( 𝑝 ‘ 𝑛 )  ≠  0 ) | 
						
							| 6 |  | poimirlem21.4 | ⊢ ( 𝜑  →  ( 2nd  ‘ 𝑇 )  =  𝑁 ) | 
						
							| 7 |  | oveq2 | ⊢ ( 1  =  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 )  →  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  1 )  =  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) ) | 
						
							| 8 | 7 | eleq1d | ⊢ ( 1  =  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 )  →  ( ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  1 )  ∈  ( 0 ..^ 𝐾 )  ↔  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) )  ∈  ( 0 ..^ 𝐾 ) ) ) | 
						
							| 9 |  | oveq2 | ⊢ ( 0  =  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 )  →  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  0 )  =  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) ) | 
						
							| 10 | 9 | eleq1d | ⊢ ( 0  =  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 )  →  ( ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  0 )  ∈  ( 0 ..^ 𝐾 )  ↔  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) )  ∈  ( 0 ..^ 𝐾 ) ) ) | 
						
							| 11 |  | fveq2 | ⊢ ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 )  →  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  =  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ) ) | 
						
							| 12 | 11 | oveq1d | ⊢ ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 )  →  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  1 )  =  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  −  1 ) ) | 
						
							| 13 | 12 | adantl | ⊢ ( ( 𝜑  ∧  𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  →  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  1 )  =  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  −  1 ) ) | 
						
							| 14 |  | elrabi | ⊢ ( 𝑇  ∈  { 𝑡  ∈  ( ( ( ( 0 ..^ 𝐾 )  ↑m  ( 1 ... 𝑁 ) )  ×  { 𝑓  ∣  𝑓 : ( 1 ... 𝑁 ) –1-1-onto→ ( 1 ... 𝑁 ) } )  ×  ( 0 ... 𝑁 ) )  ∣  𝐹  =  ( 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) )  ↦  ⦋ if ( 𝑦  <  ( 2nd  ‘ 𝑡 ) ,  𝑦 ,  ( 𝑦  +  1 ) )  /  𝑗 ⦌ ( ( 1st  ‘ ( 1st  ‘ 𝑡 ) )  ∘f   +  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑡 ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑡 ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) ) }  →  𝑇  ∈  ( ( ( ( 0 ..^ 𝐾 )  ↑m  ( 1 ... 𝑁 ) )  ×  { 𝑓  ∣  𝑓 : ( 1 ... 𝑁 ) –1-1-onto→ ( 1 ... 𝑁 ) } )  ×  ( 0 ... 𝑁 ) ) ) | 
						
							| 15 | 14 2 | eleq2s | ⊢ ( 𝑇  ∈  𝑆  →  𝑇  ∈  ( ( ( ( 0 ..^ 𝐾 )  ↑m  ( 1 ... 𝑁 ) )  ×  { 𝑓  ∣  𝑓 : ( 1 ... 𝑁 ) –1-1-onto→ ( 1 ... 𝑁 ) } )  ×  ( 0 ... 𝑁 ) ) ) | 
						
							| 16 | 4 15 | syl | ⊢ ( 𝜑  →  𝑇  ∈  ( ( ( ( 0 ..^ 𝐾 )  ↑m  ( 1 ... 𝑁 ) )  ×  { 𝑓  ∣  𝑓 : ( 1 ... 𝑁 ) –1-1-onto→ ( 1 ... 𝑁 ) } )  ×  ( 0 ... 𝑁 ) ) ) | 
						
							| 17 |  | xp1st | ⊢ ( 𝑇  ∈  ( ( ( ( 0 ..^ 𝐾 )  ↑m  ( 1 ... 𝑁 ) )  ×  { 𝑓  ∣  𝑓 : ( 1 ... 𝑁 ) –1-1-onto→ ( 1 ... 𝑁 ) } )  ×  ( 0 ... 𝑁 ) )  →  ( 1st  ‘ 𝑇 )  ∈  ( ( ( 0 ..^ 𝐾 )  ↑m  ( 1 ... 𝑁 ) )  ×  { 𝑓  ∣  𝑓 : ( 1 ... 𝑁 ) –1-1-onto→ ( 1 ... 𝑁 ) } ) ) | 
						
							| 18 | 16 17 | syl | ⊢ ( 𝜑  →  ( 1st  ‘ 𝑇 )  ∈  ( ( ( 0 ..^ 𝐾 )  ↑m  ( 1 ... 𝑁 ) )  ×  { 𝑓  ∣  𝑓 : ( 1 ... 𝑁 ) –1-1-onto→ ( 1 ... 𝑁 ) } ) ) | 
						
							| 19 |  | xp1st | ⊢ ( ( 1st  ‘ 𝑇 )  ∈  ( ( ( 0 ..^ 𝐾 )  ↑m  ( 1 ... 𝑁 ) )  ×  { 𝑓  ∣  𝑓 : ( 1 ... 𝑁 ) –1-1-onto→ ( 1 ... 𝑁 ) } )  →  ( 1st  ‘ ( 1st  ‘ 𝑇 ) )  ∈  ( ( 0 ..^ 𝐾 )  ↑m  ( 1 ... 𝑁 ) ) ) | 
						
							| 20 | 18 19 | syl | ⊢ ( 𝜑  →  ( 1st  ‘ ( 1st  ‘ 𝑇 ) )  ∈  ( ( 0 ..^ 𝐾 )  ↑m  ( 1 ... 𝑁 ) ) ) | 
						
							| 21 |  | elmapi | ⊢ ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) )  ∈  ( ( 0 ..^ 𝐾 )  ↑m  ( 1 ... 𝑁 ) )  →  ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) : ( 1 ... 𝑁 ) ⟶ ( 0 ..^ 𝐾 ) ) | 
						
							| 22 | 20 21 | syl | ⊢ ( 𝜑  →  ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) : ( 1 ... 𝑁 ) ⟶ ( 0 ..^ 𝐾 ) ) | 
						
							| 23 |  | xp2nd | ⊢ ( ( 1st  ‘ 𝑇 )  ∈  ( ( ( 0 ..^ 𝐾 )  ↑m  ( 1 ... 𝑁 ) )  ×  { 𝑓  ∣  𝑓 : ( 1 ... 𝑁 ) –1-1-onto→ ( 1 ... 𝑁 ) } )  →  ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∈  { 𝑓  ∣  𝑓 : ( 1 ... 𝑁 ) –1-1-onto→ ( 1 ... 𝑁 ) } ) | 
						
							| 24 | 18 23 | syl | ⊢ ( 𝜑  →  ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∈  { 𝑓  ∣  𝑓 : ( 1 ... 𝑁 ) –1-1-onto→ ( 1 ... 𝑁 ) } ) | 
						
							| 25 |  | fvex | ⊢ ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∈  V | 
						
							| 26 |  | f1oeq1 | ⊢ ( 𝑓  =  ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  →  ( 𝑓 : ( 1 ... 𝑁 ) –1-1-onto→ ( 1 ... 𝑁 )  ↔  ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) : ( 1 ... 𝑁 ) –1-1-onto→ ( 1 ... 𝑁 ) ) ) | 
						
							| 27 | 25 26 | elab | ⊢ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∈  { 𝑓  ∣  𝑓 : ( 1 ... 𝑁 ) –1-1-onto→ ( 1 ... 𝑁 ) }  ↔  ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) : ( 1 ... 𝑁 ) –1-1-onto→ ( 1 ... 𝑁 ) ) | 
						
							| 28 | 24 27 | sylib | ⊢ ( 𝜑  →  ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) : ( 1 ... 𝑁 ) –1-1-onto→ ( 1 ... 𝑁 ) ) | 
						
							| 29 |  | f1of | ⊢ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) : ( 1 ... 𝑁 ) –1-1-onto→ ( 1 ... 𝑁 )  →  ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) : ( 1 ... 𝑁 ) ⟶ ( 1 ... 𝑁 ) ) | 
						
							| 30 | 28 29 | syl | ⊢ ( 𝜑  →  ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) : ( 1 ... 𝑁 ) ⟶ ( 1 ... 𝑁 ) ) | 
						
							| 31 |  | elfz1end | ⊢ ( 𝑁  ∈  ℕ  ↔  𝑁  ∈  ( 1 ... 𝑁 ) ) | 
						
							| 32 | 1 31 | sylib | ⊢ ( 𝜑  →  𝑁  ∈  ( 1 ... 𝑁 ) ) | 
						
							| 33 | 30 32 | ffvelcdmd | ⊢ ( 𝜑  →  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 )  ∈  ( 1 ... 𝑁 ) ) | 
						
							| 34 | 22 33 | ffvelcdmd | ⊢ ( 𝜑  →  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  ∈  ( 0 ..^ 𝐾 ) ) | 
						
							| 35 |  | elfzonn0 | ⊢ ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  ∈  ( 0 ..^ 𝐾 )  →  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  ∈  ℕ0 ) | 
						
							| 36 | 34 35 | syl | ⊢ ( 𝜑  →  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  ∈  ℕ0 ) | 
						
							| 37 |  | fvex | ⊢ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 )  ∈  V | 
						
							| 38 |  | eleq1 | ⊢ ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 )  →  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↔  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 )  ∈  ( 1 ... 𝑁 ) ) ) | 
						
							| 39 | 38 | anbi2d | ⊢ ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 )  →  ( ( 𝜑  ∧  𝑛  ∈  ( 1 ... 𝑁 ) )  ↔  ( 𝜑  ∧  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 )  ∈  ( 1 ... 𝑁 ) ) ) ) | 
						
							| 40 |  | fveq2 | ⊢ ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 )  →  ( 𝑝 ‘ 𝑛 )  =  ( 𝑝 ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ) ) | 
						
							| 41 | 40 | neeq1d | ⊢ ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 )  →  ( ( 𝑝 ‘ 𝑛 )  ≠  0  ↔  ( 𝑝 ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  ≠  0 ) ) | 
						
							| 42 | 41 | rexbidv | ⊢ ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 )  →  ( ∃ 𝑝  ∈  ran  𝐹 ( 𝑝 ‘ 𝑛 )  ≠  0  ↔  ∃ 𝑝  ∈  ran  𝐹 ( 𝑝 ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  ≠  0 ) ) | 
						
							| 43 | 39 42 | imbi12d | ⊢ ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 )  →  ( ( ( 𝜑  ∧  𝑛  ∈  ( 1 ... 𝑁 ) )  →  ∃ 𝑝  ∈  ran  𝐹 ( 𝑝 ‘ 𝑛 )  ≠  0 )  ↔  ( ( 𝜑  ∧  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 )  ∈  ( 1 ... 𝑁 ) )  →  ∃ 𝑝  ∈  ran  𝐹 ( 𝑝 ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  ≠  0 ) ) ) | 
						
							| 44 | 37 43 5 | vtocl | ⊢ ( ( 𝜑  ∧  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 )  ∈  ( 1 ... 𝑁 ) )  →  ∃ 𝑝  ∈  ran  𝐹 ( 𝑝 ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  ≠  0 ) | 
						
							| 45 | 33 44 | mpdan | ⊢ ( 𝜑  →  ∃ 𝑝  ∈  ran  𝐹 ( 𝑝 ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  ≠  0 ) | 
						
							| 46 |  | fveq1 | ⊢ ( 𝑝  =  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) )  ∘f   +  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) )  →  ( 𝑝 ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  =  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) )  ∘f   +  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ) ) | 
						
							| 47 | 22 | ffnd | ⊢ ( 𝜑  →  ( 1st  ‘ ( 1st  ‘ 𝑇 ) )  Fn  ( 1 ... 𝑁 ) ) | 
						
							| 48 | 47 | adantr | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) )  →  ( 1st  ‘ ( 1st  ‘ 𝑇 ) )  Fn  ( 1 ... 𝑁 ) ) | 
						
							| 49 |  | 1ex | ⊢ 1  ∈  V | 
						
							| 50 |  | fnconstg | ⊢ ( 1  ∈  V  →  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ×  { 1 } )  Fn  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) ) ) | 
						
							| 51 | 49 50 | ax-mp | ⊢ ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ×  { 1 } )  Fn  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) ) | 
						
							| 52 |  | c0ex | ⊢ 0  ∈  V | 
						
							| 53 |  | fnconstg | ⊢ ( 0  ∈  V  →  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) )  ×  { 0 } )  Fn  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) ) ) | 
						
							| 54 | 52 53 | ax-mp | ⊢ ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) )  ×  { 0 } )  Fn  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) ) | 
						
							| 55 | 51 54 | pm3.2i | ⊢ ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ×  { 1 } )  Fn  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ∧  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) )  ×  { 0 } )  Fn  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) ) ) | 
						
							| 56 |  | dff1o3 | ⊢ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) : ( 1 ... 𝑁 ) –1-1-onto→ ( 1 ... 𝑁 )  ↔  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) : ( 1 ... 𝑁 ) –onto→ ( 1 ... 𝑁 )  ∧  Fun  ◡ ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ) ) | 
						
							| 57 | 56 | simprbi | ⊢ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) : ( 1 ... 𝑁 ) –1-1-onto→ ( 1 ... 𝑁 )  →  Fun  ◡ ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ) | 
						
							| 58 | 28 57 | syl | ⊢ ( 𝜑  →  Fun  ◡ ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ) | 
						
							| 59 |  | imain | ⊢ ( Fun  ◡ ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  →  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 1 ... 𝑦 )  ∩  ( ( 𝑦  +  1 ) ... 𝑁 ) ) )  =  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ∩  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) ) ) ) | 
						
							| 60 | 58 59 | syl | ⊢ ( 𝜑  →  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 1 ... 𝑦 )  ∩  ( ( 𝑦  +  1 ) ... 𝑁 ) ) )  =  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ∩  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) ) ) ) | 
						
							| 61 |  | elfznn0 | ⊢ ( 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) )  →  𝑦  ∈  ℕ0 ) | 
						
							| 62 | 61 | nn0red | ⊢ ( 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) )  →  𝑦  ∈  ℝ ) | 
						
							| 63 | 62 | ltp1d | ⊢ ( 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) )  →  𝑦  <  ( 𝑦  +  1 ) ) | 
						
							| 64 |  | fzdisj | ⊢ ( 𝑦  <  ( 𝑦  +  1 )  →  ( ( 1 ... 𝑦 )  ∩  ( ( 𝑦  +  1 ) ... 𝑁 ) )  =  ∅ ) | 
						
							| 65 | 63 64 | syl | ⊢ ( 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) )  →  ( ( 1 ... 𝑦 )  ∩  ( ( 𝑦  +  1 ) ... 𝑁 ) )  =  ∅ ) | 
						
							| 66 | 65 | imaeq2d | ⊢ ( 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) )  →  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 1 ... 𝑦 )  ∩  ( ( 𝑦  +  1 ) ... 𝑁 ) ) )  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ∅ ) ) | 
						
							| 67 |  | ima0 | ⊢ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ∅ )  =  ∅ | 
						
							| 68 | 66 67 | eqtrdi | ⊢ ( 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) )  →  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 1 ... 𝑦 )  ∩  ( ( 𝑦  +  1 ) ... 𝑁 ) ) )  =  ∅ ) | 
						
							| 69 | 60 68 | sylan9req | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) )  →  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ∩  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) ) )  =  ∅ ) | 
						
							| 70 |  | fnun | ⊢ ( ( ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ×  { 1 } )  Fn  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ∧  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) )  ×  { 0 } )  Fn  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) ) )  ∧  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ∩  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) ) )  =  ∅ )  →  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) )  ×  { 0 } ) )  Fn  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ∪  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) ) ) ) | 
						
							| 71 | 55 69 70 | sylancr | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) )  →  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) )  ×  { 0 } ) )  Fn  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ∪  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) ) ) ) | 
						
							| 72 |  | imaundi | ⊢ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 1 ... 𝑦 )  ∪  ( ( 𝑦  +  1 ) ... 𝑁 ) ) )  =  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ∪  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) ) ) | 
						
							| 73 |  | nn0p1nn | ⊢ ( 𝑦  ∈  ℕ0  →  ( 𝑦  +  1 )  ∈  ℕ ) | 
						
							| 74 |  | nnuz | ⊢ ℕ  =  ( ℤ≥ ‘ 1 ) | 
						
							| 75 | 73 74 | eleqtrdi | ⊢ ( 𝑦  ∈  ℕ0  →  ( 𝑦  +  1 )  ∈  ( ℤ≥ ‘ 1 ) ) | 
						
							| 76 | 61 75 | syl | ⊢ ( 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) )  →  ( 𝑦  +  1 )  ∈  ( ℤ≥ ‘ 1 ) ) | 
						
							| 77 | 76 | adantl | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) )  →  ( 𝑦  +  1 )  ∈  ( ℤ≥ ‘ 1 ) ) | 
						
							| 78 | 1 | nncnd | ⊢ ( 𝜑  →  𝑁  ∈  ℂ ) | 
						
							| 79 |  | npcan1 | ⊢ ( 𝑁  ∈  ℂ  →  ( ( 𝑁  −  1 )  +  1 )  =  𝑁 ) | 
						
							| 80 | 78 79 | syl | ⊢ ( 𝜑  →  ( ( 𝑁  −  1 )  +  1 )  =  𝑁 ) | 
						
							| 81 | 80 | adantr | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) )  →  ( ( 𝑁  −  1 )  +  1 )  =  𝑁 ) | 
						
							| 82 |  | elfzuz3 | ⊢ ( 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) )  →  ( 𝑁  −  1 )  ∈  ( ℤ≥ ‘ 𝑦 ) ) | 
						
							| 83 |  | peano2uz | ⊢ ( ( 𝑁  −  1 )  ∈  ( ℤ≥ ‘ 𝑦 )  →  ( ( 𝑁  −  1 )  +  1 )  ∈  ( ℤ≥ ‘ 𝑦 ) ) | 
						
							| 84 | 82 83 | syl | ⊢ ( 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) )  →  ( ( 𝑁  −  1 )  +  1 )  ∈  ( ℤ≥ ‘ 𝑦 ) ) | 
						
							| 85 | 84 | adantl | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) )  →  ( ( 𝑁  −  1 )  +  1 )  ∈  ( ℤ≥ ‘ 𝑦 ) ) | 
						
							| 86 | 81 85 | eqeltrrd | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) )  →  𝑁  ∈  ( ℤ≥ ‘ 𝑦 ) ) | 
						
							| 87 |  | fzsplit2 | ⊢ ( ( ( 𝑦  +  1 )  ∈  ( ℤ≥ ‘ 1 )  ∧  𝑁  ∈  ( ℤ≥ ‘ 𝑦 ) )  →  ( 1 ... 𝑁 )  =  ( ( 1 ... 𝑦 )  ∪  ( ( 𝑦  +  1 ) ... 𝑁 ) ) ) | 
						
							| 88 | 77 86 87 | syl2anc | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) )  →  ( 1 ... 𝑁 )  =  ( ( 1 ... 𝑦 )  ∪  ( ( 𝑦  +  1 ) ... 𝑁 ) ) ) | 
						
							| 89 | 88 | imaeq2d | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) )  →  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑁 ) )  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 1 ... 𝑦 )  ∪  ( ( 𝑦  +  1 ) ... 𝑁 ) ) ) ) | 
						
							| 90 |  | f1ofo | ⊢ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) : ( 1 ... 𝑁 ) –1-1-onto→ ( 1 ... 𝑁 )  →  ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) : ( 1 ... 𝑁 ) –onto→ ( 1 ... 𝑁 ) ) | 
						
							| 91 |  | foima | ⊢ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) : ( 1 ... 𝑁 ) –onto→ ( 1 ... 𝑁 )  →  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑁 ) )  =  ( 1 ... 𝑁 ) ) | 
						
							| 92 | 28 90 91 | 3syl | ⊢ ( 𝜑  →  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑁 ) )  =  ( 1 ... 𝑁 ) ) | 
						
							| 93 | 92 | adantr | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) )  →  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑁 ) )  =  ( 1 ... 𝑁 ) ) | 
						
							| 94 | 89 93 | eqtr3d | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) )  →  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 1 ... 𝑦 )  ∪  ( ( 𝑦  +  1 ) ... 𝑁 ) ) )  =  ( 1 ... 𝑁 ) ) | 
						
							| 95 | 72 94 | eqtr3id | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) )  →  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ∪  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) ) )  =  ( 1 ... 𝑁 ) ) | 
						
							| 96 | 95 | fneq2d | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) )  →  ( ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) )  ×  { 0 } ) )  Fn  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ∪  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) ) )  ↔  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) )  ×  { 0 } ) )  Fn  ( 1 ... 𝑁 ) ) ) | 
						
							| 97 | 71 96 | mpbid | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) )  →  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) )  ×  { 0 } ) )  Fn  ( 1 ... 𝑁 ) ) | 
						
							| 98 |  | ovex | ⊢ ( 1 ... 𝑁 )  ∈  V | 
						
							| 99 | 98 | a1i | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) )  →  ( 1 ... 𝑁 )  ∈  V ) | 
						
							| 100 |  | inidm | ⊢ ( ( 1 ... 𝑁 )  ∩  ( 1 ... 𝑁 ) )  =  ( 1 ... 𝑁 ) | 
						
							| 101 |  | eqidd | ⊢ ( ( ( 𝜑  ∧  𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) )  ∧  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 )  ∈  ( 1 ... 𝑁 ) )  →  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  =  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ) ) | 
						
							| 102 |  | f1ofn | ⊢ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) : ( 1 ... 𝑁 ) –1-1-onto→ ( 1 ... 𝑁 )  →  ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  Fn  ( 1 ... 𝑁 ) ) | 
						
							| 103 | 28 102 | syl | ⊢ ( 𝜑  →  ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  Fn  ( 1 ... 𝑁 ) ) | 
						
							| 104 | 103 | adantr | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) )  →  ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  Fn  ( 1 ... 𝑁 ) ) | 
						
							| 105 |  | fzss1 | ⊢ ( ( 𝑦  +  1 )  ∈  ( ℤ≥ ‘ 1 )  →  ( ( 𝑦  +  1 ) ... 𝑁 )  ⊆  ( 1 ... 𝑁 ) ) | 
						
							| 106 | 76 105 | syl | ⊢ ( 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) )  →  ( ( 𝑦  +  1 ) ... 𝑁 )  ⊆  ( 1 ... 𝑁 ) ) | 
						
							| 107 | 106 | adantl | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) )  →  ( ( 𝑦  +  1 ) ... 𝑁 )  ⊆  ( 1 ... 𝑁 ) ) | 
						
							| 108 |  | eluzp1p1 | ⊢ ( ( 𝑁  −  1 )  ∈  ( ℤ≥ ‘ 𝑦 )  →  ( ( 𝑁  −  1 )  +  1 )  ∈  ( ℤ≥ ‘ ( 𝑦  +  1 ) ) ) | 
						
							| 109 |  | uzss | ⊢ ( ( ( 𝑁  −  1 )  +  1 )  ∈  ( ℤ≥ ‘ ( 𝑦  +  1 ) )  →  ( ℤ≥ ‘ ( ( 𝑁  −  1 )  +  1 ) )  ⊆  ( ℤ≥ ‘ ( 𝑦  +  1 ) ) ) | 
						
							| 110 | 82 108 109 | 3syl | ⊢ ( 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) )  →  ( ℤ≥ ‘ ( ( 𝑁  −  1 )  +  1 ) )  ⊆  ( ℤ≥ ‘ ( 𝑦  +  1 ) ) ) | 
						
							| 111 | 110 | adantl | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) )  →  ( ℤ≥ ‘ ( ( 𝑁  −  1 )  +  1 ) )  ⊆  ( ℤ≥ ‘ ( 𝑦  +  1 ) ) ) | 
						
							| 112 | 1 | nnzd | ⊢ ( 𝜑  →  𝑁  ∈  ℤ ) | 
						
							| 113 | 112 | uzidd | ⊢ ( 𝜑  →  𝑁  ∈  ( ℤ≥ ‘ 𝑁 ) ) | 
						
							| 114 | 80 | fveq2d | ⊢ ( 𝜑  →  ( ℤ≥ ‘ ( ( 𝑁  −  1 )  +  1 ) )  =  ( ℤ≥ ‘ 𝑁 ) ) | 
						
							| 115 | 113 114 | eleqtrrd | ⊢ ( 𝜑  →  𝑁  ∈  ( ℤ≥ ‘ ( ( 𝑁  −  1 )  +  1 ) ) ) | 
						
							| 116 | 115 | adantr | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) )  →  𝑁  ∈  ( ℤ≥ ‘ ( ( 𝑁  −  1 )  +  1 ) ) ) | 
						
							| 117 | 111 116 | sseldd | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) )  →  𝑁  ∈  ( ℤ≥ ‘ ( 𝑦  +  1 ) ) ) | 
						
							| 118 |  | eluzfz2 | ⊢ ( 𝑁  ∈  ( ℤ≥ ‘ ( 𝑦  +  1 ) )  →  𝑁  ∈  ( ( 𝑦  +  1 ) ... 𝑁 ) ) | 
						
							| 119 | 117 118 | syl | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) )  →  𝑁  ∈  ( ( 𝑦  +  1 ) ... 𝑁 ) ) | 
						
							| 120 |  | fnfvima | ⊢ ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  Fn  ( 1 ... 𝑁 )  ∧  ( ( 𝑦  +  1 ) ... 𝑁 )  ⊆  ( 1 ... 𝑁 )  ∧  𝑁  ∈  ( ( 𝑦  +  1 ) ... 𝑁 ) )  →  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 )  ∈  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) ) ) | 
						
							| 121 | 104 107 119 120 | syl3anc | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) )  →  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 )  ∈  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) ) ) | 
						
							| 122 |  | fvun2 | ⊢ ( ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ×  { 1 } )  Fn  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ∧  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) )  ×  { 0 } )  Fn  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) )  ∧  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ∩  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) ) )  =  ∅  ∧  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 )  ∈  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) ) ) )  →  ( ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  =  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ) ) | 
						
							| 123 | 51 54 122 | mp3an12 | ⊢ ( ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ∩  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) ) )  =  ∅  ∧  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 )  ∈  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) ) )  →  ( ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  =  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ) ) | 
						
							| 124 | 69 121 123 | syl2anc | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) )  →  ( ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  =  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ) ) | 
						
							| 125 | 52 | fvconst2 | ⊢ ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 )  ∈  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) )  →  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  =  0 ) | 
						
							| 126 | 121 125 | syl | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) )  →  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  =  0 ) | 
						
							| 127 | 124 126 | eqtrd | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) )  →  ( ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  =  0 ) | 
						
							| 128 | 127 | adantr | ⊢ ( ( ( 𝜑  ∧  𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) )  ∧  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 )  ∈  ( 1 ... 𝑁 ) )  →  ( ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  =  0 ) | 
						
							| 129 | 48 97 99 99 100 101 128 | ofval | ⊢ ( ( ( 𝜑  ∧  𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) )  ∧  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 )  ∈  ( 1 ... 𝑁 ) )  →  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) )  ∘f   +  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  =  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  +  0 ) ) | 
						
							| 130 | 33 129 | mpidan | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) )  →  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) )  ∘f   +  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  =  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  +  0 ) ) | 
						
							| 131 | 36 | nn0cnd | ⊢ ( 𝜑  →  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  ∈  ℂ ) | 
						
							| 132 | 131 | addridd | ⊢ ( 𝜑  →  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  +  0 )  =  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ) ) | 
						
							| 133 | 132 | adantr | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) )  →  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  +  0 )  =  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ) ) | 
						
							| 134 | 130 133 | eqtrd | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) )  →  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) )  ∘f   +  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  =  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ) ) | 
						
							| 135 | 46 134 | sylan9eqr | ⊢ ( ( ( 𝜑  ∧  𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) )  ∧  𝑝  =  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) )  ∘f   +  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) )  →  ( 𝑝 ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  =  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ) ) | 
						
							| 136 | 135 | adantllr | ⊢ ( ( ( ( 𝜑  ∧  𝑝  ∈  ran  𝐹 )  ∧  𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) )  ∧  𝑝  =  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) )  ∘f   +  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) )  →  ( 𝑝 ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  =  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ) ) | 
						
							| 137 |  | fveq2 | ⊢ ( 𝑡  =  𝑇  →  ( 2nd  ‘ 𝑡 )  =  ( 2nd  ‘ 𝑇 ) ) | 
						
							| 138 | 137 | breq2d | ⊢ ( 𝑡  =  𝑇  →  ( 𝑦  <  ( 2nd  ‘ 𝑡 )  ↔  𝑦  <  ( 2nd  ‘ 𝑇 ) ) ) | 
						
							| 139 | 138 | ifbid | ⊢ ( 𝑡  =  𝑇  →  if ( 𝑦  <  ( 2nd  ‘ 𝑡 ) ,  𝑦 ,  ( 𝑦  +  1 ) )  =  if ( 𝑦  <  ( 2nd  ‘ 𝑇 ) ,  𝑦 ,  ( 𝑦  +  1 ) ) ) | 
						
							| 140 |  | 2fveq3 | ⊢ ( 𝑡  =  𝑇  →  ( 1st  ‘ ( 1st  ‘ 𝑡 ) )  =  ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ) | 
						
							| 141 |  | 2fveq3 | ⊢ ( 𝑡  =  𝑇  →  ( 2nd  ‘ ( 1st  ‘ 𝑡 ) )  =  ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ) | 
						
							| 142 | 141 | imaeq1d | ⊢ ( 𝑡  =  𝑇  →  ( ( 2nd  ‘ ( 1st  ‘ 𝑡 ) )  “  ( 1 ... 𝑗 ) )  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑗 ) ) ) | 
						
							| 143 | 142 | xpeq1d | ⊢ ( 𝑡  =  𝑇  →  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑡 ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } )  =  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } ) ) | 
						
							| 144 | 141 | imaeq1d | ⊢ ( 𝑡  =  𝑇  →  ( ( 2nd  ‘ ( 1st  ‘ 𝑡 ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) ) ) | 
						
							| 145 | 144 | xpeq1d | ⊢ ( 𝑡  =  𝑇  →  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑡 ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } )  =  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) | 
						
							| 146 | 143 145 | uneq12d | ⊢ ( 𝑡  =  𝑇  →  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑡 ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑡 ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } ) )  =  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) | 
						
							| 147 | 140 146 | oveq12d | ⊢ ( 𝑡  =  𝑇  →  ( ( 1st  ‘ ( 1st  ‘ 𝑡 ) )  ∘f   +  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑡 ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑡 ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) )  =  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) )  ∘f   +  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) ) | 
						
							| 148 | 139 147 | csbeq12dv | ⊢ ( 𝑡  =  𝑇  →  ⦋ if ( 𝑦  <  ( 2nd  ‘ 𝑡 ) ,  𝑦 ,  ( 𝑦  +  1 ) )  /  𝑗 ⦌ ( ( 1st  ‘ ( 1st  ‘ 𝑡 ) )  ∘f   +  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑡 ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑡 ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) )  =  ⦋ if ( 𝑦  <  ( 2nd  ‘ 𝑇 ) ,  𝑦 ,  ( 𝑦  +  1 ) )  /  𝑗 ⦌ ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) )  ∘f   +  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) ) | 
						
							| 149 | 148 | mpteq2dv | ⊢ ( 𝑡  =  𝑇  →  ( 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) )  ↦  ⦋ if ( 𝑦  <  ( 2nd  ‘ 𝑡 ) ,  𝑦 ,  ( 𝑦  +  1 ) )  /  𝑗 ⦌ ( ( 1st  ‘ ( 1st  ‘ 𝑡 ) )  ∘f   +  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑡 ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑡 ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) )  =  ( 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) )  ↦  ⦋ if ( 𝑦  <  ( 2nd  ‘ 𝑇 ) ,  𝑦 ,  ( 𝑦  +  1 ) )  /  𝑗 ⦌ ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) )  ∘f   +  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) ) ) | 
						
							| 150 | 149 | eqeq2d | ⊢ ( 𝑡  =  𝑇  →  ( 𝐹  =  ( 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) )  ↦  ⦋ if ( 𝑦  <  ( 2nd  ‘ 𝑡 ) ,  𝑦 ,  ( 𝑦  +  1 ) )  /  𝑗 ⦌ ( ( 1st  ‘ ( 1st  ‘ 𝑡 ) )  ∘f   +  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑡 ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑡 ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) )  ↔  𝐹  =  ( 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) )  ↦  ⦋ if ( 𝑦  <  ( 2nd  ‘ 𝑇 ) ,  𝑦 ,  ( 𝑦  +  1 ) )  /  𝑗 ⦌ ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) )  ∘f   +  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) ) ) ) | 
						
							| 151 | 150 2 | elrab2 | ⊢ ( 𝑇  ∈  𝑆  ↔  ( 𝑇  ∈  ( ( ( ( 0 ..^ 𝐾 )  ↑m  ( 1 ... 𝑁 ) )  ×  { 𝑓  ∣  𝑓 : ( 1 ... 𝑁 ) –1-1-onto→ ( 1 ... 𝑁 ) } )  ×  ( 0 ... 𝑁 ) )  ∧  𝐹  =  ( 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) )  ↦  ⦋ if ( 𝑦  <  ( 2nd  ‘ 𝑇 ) ,  𝑦 ,  ( 𝑦  +  1 ) )  /  𝑗 ⦌ ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) )  ∘f   +  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) ) ) ) | 
						
							| 152 | 151 | simprbi | ⊢ ( 𝑇  ∈  𝑆  →  𝐹  =  ( 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) )  ↦  ⦋ if ( 𝑦  <  ( 2nd  ‘ 𝑇 ) ,  𝑦 ,  ( 𝑦  +  1 ) )  /  𝑗 ⦌ ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) )  ∘f   +  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) ) ) | 
						
							| 153 | 4 152 | syl | ⊢ ( 𝜑  →  𝐹  =  ( 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) )  ↦  ⦋ if ( 𝑦  <  ( 2nd  ‘ 𝑇 ) ,  𝑦 ,  ( 𝑦  +  1 ) )  /  𝑗 ⦌ ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) )  ∘f   +  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) ) ) | 
						
							| 154 | 62 | adantl | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) )  →  𝑦  ∈  ℝ ) | 
						
							| 155 |  | peano2zm | ⊢ ( 𝑁  ∈  ℤ  →  ( 𝑁  −  1 )  ∈  ℤ ) | 
						
							| 156 | 112 155 | syl | ⊢ ( 𝜑  →  ( 𝑁  −  1 )  ∈  ℤ ) | 
						
							| 157 | 156 | zred | ⊢ ( 𝜑  →  ( 𝑁  −  1 )  ∈  ℝ ) | 
						
							| 158 | 157 | adantr | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) )  →  ( 𝑁  −  1 )  ∈  ℝ ) | 
						
							| 159 | 1 | nnred | ⊢ ( 𝜑  →  𝑁  ∈  ℝ ) | 
						
							| 160 | 159 | adantr | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) )  →  𝑁  ∈  ℝ ) | 
						
							| 161 |  | elfzle2 | ⊢ ( 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) )  →  𝑦  ≤  ( 𝑁  −  1 ) ) | 
						
							| 162 | 161 | adantl | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) )  →  𝑦  ≤  ( 𝑁  −  1 ) ) | 
						
							| 163 | 159 | ltm1d | ⊢ ( 𝜑  →  ( 𝑁  −  1 )  <  𝑁 ) | 
						
							| 164 | 163 | adantr | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) )  →  ( 𝑁  −  1 )  <  𝑁 ) | 
						
							| 165 | 154 158 160 162 164 | lelttrd | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) )  →  𝑦  <  𝑁 ) | 
						
							| 166 | 6 | adantr | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) )  →  ( 2nd  ‘ 𝑇 )  =  𝑁 ) | 
						
							| 167 | 165 166 | breqtrrd | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) )  →  𝑦  <  ( 2nd  ‘ 𝑇 ) ) | 
						
							| 168 | 167 | iftrued | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) )  →  if ( 𝑦  <  ( 2nd  ‘ 𝑇 ) ,  𝑦 ,  ( 𝑦  +  1 ) )  =  𝑦 ) | 
						
							| 169 | 168 | csbeq1d | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) )  →  ⦋ if ( 𝑦  <  ( 2nd  ‘ 𝑇 ) ,  𝑦 ,  ( 𝑦  +  1 ) )  /  𝑗 ⦌ ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) )  ∘f   +  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) )  =  ⦋ 𝑦  /  𝑗 ⦌ ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) )  ∘f   +  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) ) | 
						
							| 170 |  | vex | ⊢ 𝑦  ∈  V | 
						
							| 171 |  | oveq2 | ⊢ ( 𝑗  =  𝑦  →  ( 1 ... 𝑗 )  =  ( 1 ... 𝑦 ) ) | 
						
							| 172 | 171 | imaeq2d | ⊢ ( 𝑗  =  𝑦  →  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑗 ) )  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) ) ) | 
						
							| 173 | 172 | xpeq1d | ⊢ ( 𝑗  =  𝑦  →  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } )  =  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ×  { 1 } ) ) | 
						
							| 174 |  | oveq1 | ⊢ ( 𝑗  =  𝑦  →  ( 𝑗  +  1 )  =  ( 𝑦  +  1 ) ) | 
						
							| 175 | 174 | oveq1d | ⊢ ( 𝑗  =  𝑦  →  ( ( 𝑗  +  1 ) ... 𝑁 )  =  ( ( 𝑦  +  1 ) ... 𝑁 ) ) | 
						
							| 176 | 175 | imaeq2d | ⊢ ( 𝑗  =  𝑦  →  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) ) ) | 
						
							| 177 | 176 | xpeq1d | ⊢ ( 𝑗  =  𝑦  →  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } )  =  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) | 
						
							| 178 | 173 177 | uneq12d | ⊢ ( 𝑗  =  𝑦  →  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } ) )  =  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) | 
						
							| 179 | 178 | oveq2d | ⊢ ( 𝑗  =  𝑦  →  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) )  ∘f   +  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) )  =  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) )  ∘f   +  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) ) | 
						
							| 180 | 170 179 | csbie | ⊢ ⦋ 𝑦  /  𝑗 ⦌ ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) )  ∘f   +  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) )  =  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) )  ∘f   +  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) | 
						
							| 181 | 169 180 | eqtrdi | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) )  →  ⦋ if ( 𝑦  <  ( 2nd  ‘ 𝑇 ) ,  𝑦 ,  ( 𝑦  +  1 ) )  /  𝑗 ⦌ ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) )  ∘f   +  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) )  =  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) )  ∘f   +  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) ) | 
						
							| 182 | 181 | mpteq2dva | ⊢ ( 𝜑  →  ( 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) )  ↦  ⦋ if ( 𝑦  <  ( 2nd  ‘ 𝑇 ) ,  𝑦 ,  ( 𝑦  +  1 ) )  /  𝑗 ⦌ ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) )  ∘f   +  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) )  =  ( 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) )  ↦  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) )  ∘f   +  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) ) ) | 
						
							| 183 | 153 182 | eqtrd | ⊢ ( 𝜑  →  𝐹  =  ( 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) )  ↦  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) )  ∘f   +  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) ) ) | 
						
							| 184 | 183 | rneqd | ⊢ ( 𝜑  →  ran  𝐹  =  ran  ( 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) )  ↦  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) )  ∘f   +  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) ) ) | 
						
							| 185 | 184 | eleq2d | ⊢ ( 𝜑  →  ( 𝑝  ∈  ran  𝐹  ↔  𝑝  ∈  ran  ( 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) )  ↦  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) )  ∘f   +  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) ) ) ) | 
						
							| 186 |  | eqid | ⊢ ( 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) )  ↦  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) )  ∘f   +  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) )  =  ( 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) )  ↦  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) )  ∘f   +  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) ) | 
						
							| 187 |  | ovex | ⊢ ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) )  ∘f   +  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) )  ∈  V | 
						
							| 188 | 186 187 | elrnmpti | ⊢ ( 𝑝  ∈  ran  ( 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) )  ↦  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) )  ∘f   +  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) )  ↔  ∃ 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) 𝑝  =  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) )  ∘f   +  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) ) | 
						
							| 189 | 185 188 | bitrdi | ⊢ ( 𝜑  →  ( 𝑝  ∈  ran  𝐹  ↔  ∃ 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) 𝑝  =  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) )  ∘f   +  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) ) ) | 
						
							| 190 | 189 | biimpa | ⊢ ( ( 𝜑  ∧  𝑝  ∈  ran  𝐹 )  →  ∃ 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) ) 𝑝  =  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) )  ∘f   +  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( 1 ... 𝑦 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  “  ( ( 𝑦  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) ) | 
						
							| 191 | 136 190 | r19.29a | ⊢ ( ( 𝜑  ∧  𝑝  ∈  ran  𝐹 )  →  ( 𝑝 ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  =  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ) ) | 
						
							| 192 | 191 | neeq1d | ⊢ ( ( 𝜑  ∧  𝑝  ∈  ran  𝐹 )  →  ( ( 𝑝 ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  ≠  0  ↔  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  ≠  0 ) ) | 
						
							| 193 | 192 | biimpd | ⊢ ( ( 𝜑  ∧  𝑝  ∈  ran  𝐹 )  →  ( ( 𝑝 ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  ≠  0  →  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  ≠  0 ) ) | 
						
							| 194 | 193 | rexlimdva | ⊢ ( 𝜑  →  ( ∃ 𝑝  ∈  ran  𝐹 ( 𝑝 ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  ≠  0  →  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  ≠  0 ) ) | 
						
							| 195 | 45 194 | mpd | ⊢ ( 𝜑  →  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  ≠  0 ) | 
						
							| 196 |  | elnnne0 | ⊢ ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  ∈  ℕ  ↔  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  ∈  ℕ0  ∧  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  ≠  0 ) ) | 
						
							| 197 | 36 195 196 | sylanbrc | ⊢ ( 𝜑  →  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  ∈  ℕ ) | 
						
							| 198 |  | nnm1nn0 | ⊢ ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  ∈  ℕ  →  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  −  1 )  ∈  ℕ0 ) | 
						
							| 199 | 197 198 | syl | ⊢ ( 𝜑  →  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  −  1 )  ∈  ℕ0 ) | 
						
							| 200 |  | elfzo0 | ⊢ ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  ∈  ( 0 ..^ 𝐾 )  ↔  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  ∈  ℕ0  ∧  𝐾  ∈  ℕ  ∧  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  <  𝐾 ) ) | 
						
							| 201 | 34 200 | sylib | ⊢ ( 𝜑  →  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  ∈  ℕ0  ∧  𝐾  ∈  ℕ  ∧  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  <  𝐾 ) ) | 
						
							| 202 | 201 | simp2d | ⊢ ( 𝜑  →  𝐾  ∈  ℕ ) | 
						
							| 203 | 199 | nn0red | ⊢ ( 𝜑  →  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  −  1 )  ∈  ℝ ) | 
						
							| 204 | 36 | nn0red | ⊢ ( 𝜑  →  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  ∈  ℝ ) | 
						
							| 205 | 202 | nnred | ⊢ ( 𝜑  →  𝐾  ∈  ℝ ) | 
						
							| 206 | 204 | ltm1d | ⊢ ( 𝜑  →  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  −  1 )  <  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ) ) | 
						
							| 207 |  | elfzolt2 | ⊢ ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  ∈  ( 0 ..^ 𝐾 )  →  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  <  𝐾 ) | 
						
							| 208 | 34 207 | syl | ⊢ ( 𝜑  →  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  <  𝐾 ) | 
						
							| 209 | 203 204 205 206 208 | lttrd | ⊢ ( 𝜑  →  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  −  1 )  <  𝐾 ) | 
						
							| 210 |  | elfzo0 | ⊢ ( ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  −  1 )  ∈  ( 0 ..^ 𝐾 )  ↔  ( ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  −  1 )  ∈  ℕ0  ∧  𝐾  ∈  ℕ  ∧  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  −  1 )  <  𝐾 ) ) | 
						
							| 211 | 199 202 209 210 | syl3anbrc | ⊢ ( 𝜑  →  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  −  1 )  ∈  ( 0 ..^ 𝐾 ) ) | 
						
							| 212 | 211 | adantr | ⊢ ( ( 𝜑  ∧  𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  →  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  −  1 )  ∈  ( 0 ..^ 𝐾 ) ) | 
						
							| 213 | 13 212 | eqeltrd | ⊢ ( ( 𝜑  ∧  𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  →  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  1 )  ∈  ( 0 ..^ 𝐾 ) ) | 
						
							| 214 | 213 | adantlr | ⊢ ( ( ( 𝜑  ∧  𝑛  ∈  ( 1 ... 𝑁 ) )  ∧  𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  →  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  1 )  ∈  ( 0 ..^ 𝐾 ) ) | 
						
							| 215 | 22 | ffvelcdmda | ⊢ ( ( 𝜑  ∧  𝑛  ∈  ( 1 ... 𝑁 ) )  →  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  ∈  ( 0 ..^ 𝐾 ) ) | 
						
							| 216 |  | elfzonn0 | ⊢ ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  ∈  ( 0 ..^ 𝐾 )  →  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  ∈  ℕ0 ) | 
						
							| 217 | 215 216 | syl | ⊢ ( ( 𝜑  ∧  𝑛  ∈  ( 1 ... 𝑁 ) )  →  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  ∈  ℕ0 ) | 
						
							| 218 | 217 | nn0cnd | ⊢ ( ( 𝜑  ∧  𝑛  ∈  ( 1 ... 𝑁 ) )  →  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  ∈  ℂ ) | 
						
							| 219 | 218 | subid1d | ⊢ ( ( 𝜑  ∧  𝑛  ∈  ( 1 ... 𝑁 ) )  →  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  0 )  =  ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 ) ) | 
						
							| 220 | 219 215 | eqeltrd | ⊢ ( ( 𝜑  ∧  𝑛  ∈  ( 1 ... 𝑁 ) )  →  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  0 )  ∈  ( 0 ..^ 𝐾 ) ) | 
						
							| 221 | 220 | adantr | ⊢ ( ( ( 𝜑  ∧  𝑛  ∈  ( 1 ... 𝑁 ) )  ∧  ¬  𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) )  →  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  0 )  ∈  ( 0 ..^ 𝐾 ) ) | 
						
							| 222 | 8 10 214 221 | ifbothda | ⊢ ( ( 𝜑  ∧  𝑛  ∈  ( 1 ... 𝑁 ) )  →  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) )  ∈  ( 0 ..^ 𝐾 ) ) | 
						
							| 223 | 222 | fmpttd | ⊢ ( 𝜑  →  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) ) : ( 1 ... 𝑁 ) ⟶ ( 0 ..^ 𝐾 ) ) | 
						
							| 224 |  | ovex | ⊢ ( 0 ..^ 𝐾 )  ∈  V | 
						
							| 225 | 224 98 | elmap | ⊢ ( ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) )  ∈  ( ( 0 ..^ 𝐾 )  ↑m  ( 1 ... 𝑁 ) )  ↔  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) ) : ( 1 ... 𝑁 ) ⟶ ( 0 ..^ 𝐾 ) ) | 
						
							| 226 | 223 225 | sylibr | ⊢ ( 𝜑  →  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) )  ∈  ( ( 0 ..^ 𝐾 )  ↑m  ( 1 ... 𝑁 ) ) ) | 
						
							| 227 |  | simpr | ⊢ ( ( 𝜑  ∧  𝑛  ∈  ( ( 1  +  1 ) ... 𝑁 ) )  →  𝑛  ∈  ( ( 1  +  1 ) ... 𝑁 ) ) | 
						
							| 228 |  | 1z | ⊢ 1  ∈  ℤ | 
						
							| 229 |  | peano2z | ⊢ ( 1  ∈  ℤ  →  ( 1  +  1 )  ∈  ℤ ) | 
						
							| 230 | 228 229 | ax-mp | ⊢ ( 1  +  1 )  ∈  ℤ | 
						
							| 231 | 112 230 | jctil | ⊢ ( 𝜑  →  ( ( 1  +  1 )  ∈  ℤ  ∧  𝑁  ∈  ℤ ) ) | 
						
							| 232 |  | elfzelz | ⊢ ( 𝑛  ∈  ( ( 1  +  1 ) ... 𝑁 )  →  𝑛  ∈  ℤ ) | 
						
							| 233 | 232 228 | jctir | ⊢ ( 𝑛  ∈  ( ( 1  +  1 ) ... 𝑁 )  →  ( 𝑛  ∈  ℤ  ∧  1  ∈  ℤ ) ) | 
						
							| 234 |  | fzsubel | ⊢ ( ( ( ( 1  +  1 )  ∈  ℤ  ∧  𝑁  ∈  ℤ )  ∧  ( 𝑛  ∈  ℤ  ∧  1  ∈  ℤ ) )  →  ( 𝑛  ∈  ( ( 1  +  1 ) ... 𝑁 )  ↔  ( 𝑛  −  1 )  ∈  ( ( ( 1  +  1 )  −  1 ) ... ( 𝑁  −  1 ) ) ) ) | 
						
							| 235 | 231 233 234 | syl2an | ⊢ ( ( 𝜑  ∧  𝑛  ∈  ( ( 1  +  1 ) ... 𝑁 ) )  →  ( 𝑛  ∈  ( ( 1  +  1 ) ... 𝑁 )  ↔  ( 𝑛  −  1 )  ∈  ( ( ( 1  +  1 )  −  1 ) ... ( 𝑁  −  1 ) ) ) ) | 
						
							| 236 | 227 235 | mpbid | ⊢ ( ( 𝜑  ∧  𝑛  ∈  ( ( 1  +  1 ) ... 𝑁 ) )  →  ( 𝑛  −  1 )  ∈  ( ( ( 1  +  1 )  −  1 ) ... ( 𝑁  −  1 ) ) ) | 
						
							| 237 |  | ax-1cn | ⊢ 1  ∈  ℂ | 
						
							| 238 | 237 237 | pncan3oi | ⊢ ( ( 1  +  1 )  −  1 )  =  1 | 
						
							| 239 | 238 | oveq1i | ⊢ ( ( ( 1  +  1 )  −  1 ) ... ( 𝑁  −  1 ) )  =  ( 1 ... ( 𝑁  −  1 ) ) | 
						
							| 240 | 236 239 | eleqtrdi | ⊢ ( ( 𝜑  ∧  𝑛  ∈  ( ( 1  +  1 ) ... 𝑁 ) )  →  ( 𝑛  −  1 )  ∈  ( 1 ... ( 𝑁  −  1 ) ) ) | 
						
							| 241 | 240 | ralrimiva | ⊢ ( 𝜑  →  ∀ 𝑛  ∈  ( ( 1  +  1 ) ... 𝑁 ) ( 𝑛  −  1 )  ∈  ( 1 ... ( 𝑁  −  1 ) ) ) | 
						
							| 242 |  | simpr | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 1 ... ( 𝑁  −  1 ) ) )  →  𝑦  ∈  ( 1 ... ( 𝑁  −  1 ) ) ) | 
						
							| 243 | 156 228 | jctil | ⊢ ( 𝜑  →  ( 1  ∈  ℤ  ∧  ( 𝑁  −  1 )  ∈  ℤ ) ) | 
						
							| 244 |  | elfzelz | ⊢ ( 𝑦  ∈  ( 1 ... ( 𝑁  −  1 ) )  →  𝑦  ∈  ℤ ) | 
						
							| 245 | 244 228 | jctir | ⊢ ( 𝑦  ∈  ( 1 ... ( 𝑁  −  1 ) )  →  ( 𝑦  ∈  ℤ  ∧  1  ∈  ℤ ) ) | 
						
							| 246 |  | fzaddel | ⊢ ( ( ( 1  ∈  ℤ  ∧  ( 𝑁  −  1 )  ∈  ℤ )  ∧  ( 𝑦  ∈  ℤ  ∧  1  ∈  ℤ ) )  →  ( 𝑦  ∈  ( 1 ... ( 𝑁  −  1 ) )  ↔  ( 𝑦  +  1 )  ∈  ( ( 1  +  1 ) ... ( ( 𝑁  −  1 )  +  1 ) ) ) ) | 
						
							| 247 | 243 245 246 | syl2an | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 1 ... ( 𝑁  −  1 ) ) )  →  ( 𝑦  ∈  ( 1 ... ( 𝑁  −  1 ) )  ↔  ( 𝑦  +  1 )  ∈  ( ( 1  +  1 ) ... ( ( 𝑁  −  1 )  +  1 ) ) ) ) | 
						
							| 248 | 242 247 | mpbid | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 1 ... ( 𝑁  −  1 ) ) )  →  ( 𝑦  +  1 )  ∈  ( ( 1  +  1 ) ... ( ( 𝑁  −  1 )  +  1 ) ) ) | 
						
							| 249 | 80 | oveq2d | ⊢ ( 𝜑  →  ( ( 1  +  1 ) ... ( ( 𝑁  −  1 )  +  1 ) )  =  ( ( 1  +  1 ) ... 𝑁 ) ) | 
						
							| 250 | 249 | adantr | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 1 ... ( 𝑁  −  1 ) ) )  →  ( ( 1  +  1 ) ... ( ( 𝑁  −  1 )  +  1 ) )  =  ( ( 1  +  1 ) ... 𝑁 ) ) | 
						
							| 251 | 248 250 | eleqtrd | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 1 ... ( 𝑁  −  1 ) ) )  →  ( 𝑦  +  1 )  ∈  ( ( 1  +  1 ) ... 𝑁 ) ) | 
						
							| 252 | 232 | zcnd | ⊢ ( 𝑛  ∈  ( ( 1  +  1 ) ... 𝑁 )  →  𝑛  ∈  ℂ ) | 
						
							| 253 | 244 | zcnd | ⊢ ( 𝑦  ∈  ( 1 ... ( 𝑁  −  1 ) )  →  𝑦  ∈  ℂ ) | 
						
							| 254 |  | subadd2 | ⊢ ( ( 𝑛  ∈  ℂ  ∧  1  ∈  ℂ  ∧  𝑦  ∈  ℂ )  →  ( ( 𝑛  −  1 )  =  𝑦  ↔  ( 𝑦  +  1 )  =  𝑛 ) ) | 
						
							| 255 | 237 254 | mp3an2 | ⊢ ( ( 𝑛  ∈  ℂ  ∧  𝑦  ∈  ℂ )  →  ( ( 𝑛  −  1 )  =  𝑦  ↔  ( 𝑦  +  1 )  =  𝑛 ) ) | 
						
							| 256 |  | eqcom | ⊢ ( 𝑦  =  ( 𝑛  −  1 )  ↔  ( 𝑛  −  1 )  =  𝑦 ) | 
						
							| 257 |  | eqcom | ⊢ ( 𝑛  =  ( 𝑦  +  1 )  ↔  ( 𝑦  +  1 )  =  𝑛 ) | 
						
							| 258 | 255 256 257 | 3bitr4g | ⊢ ( ( 𝑛  ∈  ℂ  ∧  𝑦  ∈  ℂ )  →  ( 𝑦  =  ( 𝑛  −  1 )  ↔  𝑛  =  ( 𝑦  +  1 ) ) ) | 
						
							| 259 | 252 253 258 | syl2anr | ⊢ ( ( 𝑦  ∈  ( 1 ... ( 𝑁  −  1 ) )  ∧  𝑛  ∈  ( ( 1  +  1 ) ... 𝑁 ) )  →  ( 𝑦  =  ( 𝑛  −  1 )  ↔  𝑛  =  ( 𝑦  +  1 ) ) ) | 
						
							| 260 | 259 | ralrimiva | ⊢ ( 𝑦  ∈  ( 1 ... ( 𝑁  −  1 ) )  →  ∀ 𝑛  ∈  ( ( 1  +  1 ) ... 𝑁 ) ( 𝑦  =  ( 𝑛  −  1 )  ↔  𝑛  =  ( 𝑦  +  1 ) ) ) | 
						
							| 261 | 260 | adantl | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 1 ... ( 𝑁  −  1 ) ) )  →  ∀ 𝑛  ∈  ( ( 1  +  1 ) ... 𝑁 ) ( 𝑦  =  ( 𝑛  −  1 )  ↔  𝑛  =  ( 𝑦  +  1 ) ) ) | 
						
							| 262 |  | reu6i | ⊢ ( ( ( 𝑦  +  1 )  ∈  ( ( 1  +  1 ) ... 𝑁 )  ∧  ∀ 𝑛  ∈  ( ( 1  +  1 ) ... 𝑁 ) ( 𝑦  =  ( 𝑛  −  1 )  ↔  𝑛  =  ( 𝑦  +  1 ) ) )  →  ∃! 𝑛  ∈  ( ( 1  +  1 ) ... 𝑁 ) 𝑦  =  ( 𝑛  −  1 ) ) | 
						
							| 263 | 251 261 262 | syl2anc | ⊢ ( ( 𝜑  ∧  𝑦  ∈  ( 1 ... ( 𝑁  −  1 ) ) )  →  ∃! 𝑛  ∈  ( ( 1  +  1 ) ... 𝑁 ) 𝑦  =  ( 𝑛  −  1 ) ) | 
						
							| 264 | 263 | ralrimiva | ⊢ ( 𝜑  →  ∀ 𝑦  ∈  ( 1 ... ( 𝑁  −  1 ) ) ∃! 𝑛  ∈  ( ( 1  +  1 ) ... 𝑁 ) 𝑦  =  ( 𝑛  −  1 ) ) | 
						
							| 265 |  | eqid | ⊢ ( 𝑛  ∈  ( ( 1  +  1 ) ... 𝑁 )  ↦  ( 𝑛  −  1 ) )  =  ( 𝑛  ∈  ( ( 1  +  1 ) ... 𝑁 )  ↦  ( 𝑛  −  1 ) ) | 
						
							| 266 | 265 | f1ompt | ⊢ ( ( 𝑛  ∈  ( ( 1  +  1 ) ... 𝑁 )  ↦  ( 𝑛  −  1 ) ) : ( ( 1  +  1 ) ... 𝑁 ) –1-1-onto→ ( 1 ... ( 𝑁  −  1 ) )  ↔  ( ∀ 𝑛  ∈  ( ( 1  +  1 ) ... 𝑁 ) ( 𝑛  −  1 )  ∈  ( 1 ... ( 𝑁  −  1 ) )  ∧  ∀ 𝑦  ∈  ( 1 ... ( 𝑁  −  1 ) ) ∃! 𝑛  ∈  ( ( 1  +  1 ) ... 𝑁 ) 𝑦  =  ( 𝑛  −  1 ) ) ) | 
						
							| 267 | 241 264 266 | sylanbrc | ⊢ ( 𝜑  →  ( 𝑛  ∈  ( ( 1  +  1 ) ... 𝑁 )  ↦  ( 𝑛  −  1 ) ) : ( ( 1  +  1 ) ... 𝑁 ) –1-1-onto→ ( 1 ... ( 𝑁  −  1 ) ) ) | 
						
							| 268 |  | f1osng | ⊢ ( ( 1  ∈  V  ∧  𝑁  ∈  ℕ )  →  { 〈 1 ,  𝑁 〉 } : { 1 } –1-1-onto→ { 𝑁 } ) | 
						
							| 269 | 49 1 268 | sylancr | ⊢ ( 𝜑  →  { 〈 1 ,  𝑁 〉 } : { 1 } –1-1-onto→ { 𝑁 } ) | 
						
							| 270 | 157 159 | ltnled | ⊢ ( 𝜑  →  ( ( 𝑁  −  1 )  <  𝑁  ↔  ¬  𝑁  ≤  ( 𝑁  −  1 ) ) ) | 
						
							| 271 | 163 270 | mpbid | ⊢ ( 𝜑  →  ¬  𝑁  ≤  ( 𝑁  −  1 ) ) | 
						
							| 272 |  | elfzle2 | ⊢ ( 𝑁  ∈  ( 1 ... ( 𝑁  −  1 ) )  →  𝑁  ≤  ( 𝑁  −  1 ) ) | 
						
							| 273 | 271 272 | nsyl | ⊢ ( 𝜑  →  ¬  𝑁  ∈  ( 1 ... ( 𝑁  −  1 ) ) ) | 
						
							| 274 |  | disjsn | ⊢ ( ( ( 1 ... ( 𝑁  −  1 ) )  ∩  { 𝑁 } )  =  ∅  ↔  ¬  𝑁  ∈  ( 1 ... ( 𝑁  −  1 ) ) ) | 
						
							| 275 | 273 274 | sylibr | ⊢ ( 𝜑  →  ( ( 1 ... ( 𝑁  −  1 ) )  ∩  { 𝑁 } )  =  ∅ ) | 
						
							| 276 |  | 1re | ⊢ 1  ∈  ℝ | 
						
							| 277 | 276 | ltp1i | ⊢ 1  <  ( 1  +  1 ) | 
						
							| 278 | 230 | zrei | ⊢ ( 1  +  1 )  ∈  ℝ | 
						
							| 279 | 276 278 | ltnlei | ⊢ ( 1  <  ( 1  +  1 )  ↔  ¬  ( 1  +  1 )  ≤  1 ) | 
						
							| 280 | 277 279 | mpbi | ⊢ ¬  ( 1  +  1 )  ≤  1 | 
						
							| 281 |  | elfzle1 | ⊢ ( 1  ∈  ( ( 1  +  1 ) ... 𝑁 )  →  ( 1  +  1 )  ≤  1 ) | 
						
							| 282 | 280 281 | mto | ⊢ ¬  1  ∈  ( ( 1  +  1 ) ... 𝑁 ) | 
						
							| 283 |  | disjsn | ⊢ ( ( ( ( 1  +  1 ) ... 𝑁 )  ∩  { 1 } )  =  ∅  ↔  ¬  1  ∈  ( ( 1  +  1 ) ... 𝑁 ) ) | 
						
							| 284 | 282 283 | mpbir | ⊢ ( ( ( 1  +  1 ) ... 𝑁 )  ∩  { 1 } )  =  ∅ | 
						
							| 285 |  | f1oun | ⊢ ( ( ( ( 𝑛  ∈  ( ( 1  +  1 ) ... 𝑁 )  ↦  ( 𝑛  −  1 ) ) : ( ( 1  +  1 ) ... 𝑁 ) –1-1-onto→ ( 1 ... ( 𝑁  −  1 ) )  ∧  { 〈 1 ,  𝑁 〉 } : { 1 } –1-1-onto→ { 𝑁 } )  ∧  ( ( ( ( 1  +  1 ) ... 𝑁 )  ∩  { 1 } )  =  ∅  ∧  ( ( 1 ... ( 𝑁  −  1 ) )  ∩  { 𝑁 } )  =  ∅ ) )  →  ( ( 𝑛  ∈  ( ( 1  +  1 ) ... 𝑁 )  ↦  ( 𝑛  −  1 ) )  ∪  { 〈 1 ,  𝑁 〉 } ) : ( ( ( 1  +  1 ) ... 𝑁 )  ∪  { 1 } ) –1-1-onto→ ( ( 1 ... ( 𝑁  −  1 ) )  ∪  { 𝑁 } ) ) | 
						
							| 286 | 284 285 | mpanr1 | ⊢ ( ( ( ( 𝑛  ∈  ( ( 1  +  1 ) ... 𝑁 )  ↦  ( 𝑛  −  1 ) ) : ( ( 1  +  1 ) ... 𝑁 ) –1-1-onto→ ( 1 ... ( 𝑁  −  1 ) )  ∧  { 〈 1 ,  𝑁 〉 } : { 1 } –1-1-onto→ { 𝑁 } )  ∧  ( ( 1 ... ( 𝑁  −  1 ) )  ∩  { 𝑁 } )  =  ∅ )  →  ( ( 𝑛  ∈  ( ( 1  +  1 ) ... 𝑁 )  ↦  ( 𝑛  −  1 ) )  ∪  { 〈 1 ,  𝑁 〉 } ) : ( ( ( 1  +  1 ) ... 𝑁 )  ∪  { 1 } ) –1-1-onto→ ( ( 1 ... ( 𝑁  −  1 ) )  ∪  { 𝑁 } ) ) | 
						
							| 287 | 267 269 275 286 | syl21anc | ⊢ ( 𝜑  →  ( ( 𝑛  ∈  ( ( 1  +  1 ) ... 𝑁 )  ↦  ( 𝑛  −  1 ) )  ∪  { 〈 1 ,  𝑁 〉 } ) : ( ( ( 1  +  1 ) ... 𝑁 )  ∪  { 1 } ) –1-1-onto→ ( ( 1 ... ( 𝑁  −  1 ) )  ∪  { 𝑁 } ) ) | 
						
							| 288 |  | eleq1 | ⊢ ( 𝑛  =  1  →  ( 𝑛  ∈  ( ( 1  +  1 ) ... 𝑁 )  ↔  1  ∈  ( ( 1  +  1 ) ... 𝑁 ) ) ) | 
						
							| 289 | 282 288 | mtbiri | ⊢ ( 𝑛  =  1  →  ¬  𝑛  ∈  ( ( 1  +  1 ) ... 𝑁 ) ) | 
						
							| 290 | 289 | necon2ai | ⊢ ( 𝑛  ∈  ( ( 1  +  1 ) ... 𝑁 )  →  𝑛  ≠  1 ) | 
						
							| 291 |  | ifnefalse | ⊢ ( 𝑛  ≠  1  →  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) )  =  ( 𝑛  −  1 ) ) | 
						
							| 292 | 290 291 | syl | ⊢ ( 𝑛  ∈  ( ( 1  +  1 ) ... 𝑁 )  →  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) )  =  ( 𝑛  −  1 ) ) | 
						
							| 293 | 292 | mpteq2ia | ⊢ ( 𝑛  ∈  ( ( 1  +  1 ) ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) )  =  ( 𝑛  ∈  ( ( 1  +  1 ) ... 𝑁 )  ↦  ( 𝑛  −  1 ) ) | 
						
							| 294 | 293 | uneq1i | ⊢ ( ( 𝑛  ∈  ( ( 1  +  1 ) ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) )  ∪  { 〈 1 ,  𝑁 〉 } )  =  ( ( 𝑛  ∈  ( ( 1  +  1 ) ... 𝑁 )  ↦  ( 𝑛  −  1 ) )  ∪  { 〈 1 ,  𝑁 〉 } ) | 
						
							| 295 | 49 | a1i | ⊢ ( 𝜑  →  1  ∈  V ) | 
						
							| 296 | 1 74 | eleqtrdi | ⊢ ( 𝜑  →  𝑁  ∈  ( ℤ≥ ‘ 1 ) ) | 
						
							| 297 |  | fzpred | ⊢ ( 𝑁  ∈  ( ℤ≥ ‘ 1 )  →  ( 1 ... 𝑁 )  =  ( { 1 }  ∪  ( ( 1  +  1 ) ... 𝑁 ) ) ) | 
						
							| 298 | 296 297 | syl | ⊢ ( 𝜑  →  ( 1 ... 𝑁 )  =  ( { 1 }  ∪  ( ( 1  +  1 ) ... 𝑁 ) ) ) | 
						
							| 299 |  | uncom | ⊢ ( { 1 }  ∪  ( ( 1  +  1 ) ... 𝑁 ) )  =  ( ( ( 1  +  1 ) ... 𝑁 )  ∪  { 1 } ) | 
						
							| 300 | 298 299 | eqtr2di | ⊢ ( 𝜑  →  ( ( ( 1  +  1 ) ... 𝑁 )  ∪  { 1 } )  =  ( 1 ... 𝑁 ) ) | 
						
							| 301 |  | iftrue | ⊢ ( 𝑛  =  1  →  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) )  =  𝑁 ) | 
						
							| 302 | 301 | adantl | ⊢ ( ( 𝜑  ∧  𝑛  =  1 )  →  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) )  =  𝑁 ) | 
						
							| 303 | 295 1 300 302 | fmptapd | ⊢ ( 𝜑  →  ( ( 𝑛  ∈  ( ( 1  +  1 ) ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) )  ∪  { 〈 1 ,  𝑁 〉 } )  =  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) ) | 
						
							| 304 | 294 303 | eqtr3id | ⊢ ( 𝜑  →  ( ( 𝑛  ∈  ( ( 1  +  1 ) ... 𝑁 )  ↦  ( 𝑛  −  1 ) )  ∪  { 〈 1 ,  𝑁 〉 } )  =  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) ) | 
						
							| 305 | 80 296 | eqeltrd | ⊢ ( 𝜑  →  ( ( 𝑁  −  1 )  +  1 )  ∈  ( ℤ≥ ‘ 1 ) ) | 
						
							| 306 |  | uzid | ⊢ ( ( 𝑁  −  1 )  ∈  ℤ  →  ( 𝑁  −  1 )  ∈  ( ℤ≥ ‘ ( 𝑁  −  1 ) ) ) | 
						
							| 307 |  | peano2uz | ⊢ ( ( 𝑁  −  1 )  ∈  ( ℤ≥ ‘ ( 𝑁  −  1 ) )  →  ( ( 𝑁  −  1 )  +  1 )  ∈  ( ℤ≥ ‘ ( 𝑁  −  1 ) ) ) | 
						
							| 308 | 156 306 307 | 3syl | ⊢ ( 𝜑  →  ( ( 𝑁  −  1 )  +  1 )  ∈  ( ℤ≥ ‘ ( 𝑁  −  1 ) ) ) | 
						
							| 309 | 80 308 | eqeltrrd | ⊢ ( 𝜑  →  𝑁  ∈  ( ℤ≥ ‘ ( 𝑁  −  1 ) ) ) | 
						
							| 310 |  | fzsplit2 | ⊢ ( ( ( ( 𝑁  −  1 )  +  1 )  ∈  ( ℤ≥ ‘ 1 )  ∧  𝑁  ∈  ( ℤ≥ ‘ ( 𝑁  −  1 ) ) )  →  ( 1 ... 𝑁 )  =  ( ( 1 ... ( 𝑁  −  1 ) )  ∪  ( ( ( 𝑁  −  1 )  +  1 ) ... 𝑁 ) ) ) | 
						
							| 311 | 305 309 310 | syl2anc | ⊢ ( 𝜑  →  ( 1 ... 𝑁 )  =  ( ( 1 ... ( 𝑁  −  1 ) )  ∪  ( ( ( 𝑁  −  1 )  +  1 ) ... 𝑁 ) ) ) | 
						
							| 312 | 80 | oveq1d | ⊢ ( 𝜑  →  ( ( ( 𝑁  −  1 )  +  1 ) ... 𝑁 )  =  ( 𝑁 ... 𝑁 ) ) | 
						
							| 313 |  | fzsn | ⊢ ( 𝑁  ∈  ℤ  →  ( 𝑁 ... 𝑁 )  =  { 𝑁 } ) | 
						
							| 314 | 112 313 | syl | ⊢ ( 𝜑  →  ( 𝑁 ... 𝑁 )  =  { 𝑁 } ) | 
						
							| 315 | 312 314 | eqtrd | ⊢ ( 𝜑  →  ( ( ( 𝑁  −  1 )  +  1 ) ... 𝑁 )  =  { 𝑁 } ) | 
						
							| 316 | 315 | uneq2d | ⊢ ( 𝜑  →  ( ( 1 ... ( 𝑁  −  1 ) )  ∪  ( ( ( 𝑁  −  1 )  +  1 ) ... 𝑁 ) )  =  ( ( 1 ... ( 𝑁  −  1 ) )  ∪  { 𝑁 } ) ) | 
						
							| 317 | 311 316 | eqtr2d | ⊢ ( 𝜑  →  ( ( 1 ... ( 𝑁  −  1 ) )  ∪  { 𝑁 } )  =  ( 1 ... 𝑁 ) ) | 
						
							| 318 | 304 300 317 | f1oeq123d | ⊢ ( 𝜑  →  ( ( ( 𝑛  ∈  ( ( 1  +  1 ) ... 𝑁 )  ↦  ( 𝑛  −  1 ) )  ∪  { 〈 1 ,  𝑁 〉 } ) : ( ( ( 1  +  1 ) ... 𝑁 )  ∪  { 1 } ) –1-1-onto→ ( ( 1 ... ( 𝑁  −  1 ) )  ∪  { 𝑁 } )  ↔  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) : ( 1 ... 𝑁 ) –1-1-onto→ ( 1 ... 𝑁 ) ) ) | 
						
							| 319 | 287 318 | mpbid | ⊢ ( 𝜑  →  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) : ( 1 ... 𝑁 ) –1-1-onto→ ( 1 ... 𝑁 ) ) | 
						
							| 320 |  | f1oco | ⊢ ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) : ( 1 ... 𝑁 ) –1-1-onto→ ( 1 ... 𝑁 )  ∧  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) : ( 1 ... 𝑁 ) –1-1-onto→ ( 1 ... 𝑁 ) )  →  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) ) : ( 1 ... 𝑁 ) –1-1-onto→ ( 1 ... 𝑁 ) ) | 
						
							| 321 | 28 319 320 | syl2anc | ⊢ ( 𝜑  →  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) ) : ( 1 ... 𝑁 ) –1-1-onto→ ( 1 ... 𝑁 ) ) | 
						
							| 322 | 98 | mptex | ⊢ ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) )  ∈  V | 
						
							| 323 | 25 322 | coex | ⊢ ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  ∈  V | 
						
							| 324 |  | f1oeq1 | ⊢ ( 𝑓  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  →  ( 𝑓 : ( 1 ... 𝑁 ) –1-1-onto→ ( 1 ... 𝑁 )  ↔  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) ) : ( 1 ... 𝑁 ) –1-1-onto→ ( 1 ... 𝑁 ) ) ) | 
						
							| 325 | 323 324 | elab | ⊢ ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  ∈  { 𝑓  ∣  𝑓 : ( 1 ... 𝑁 ) –1-1-onto→ ( 1 ... 𝑁 ) }  ↔  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) ) : ( 1 ... 𝑁 ) –1-1-onto→ ( 1 ... 𝑁 ) ) | 
						
							| 326 | 321 325 | sylibr | ⊢ ( 𝜑  →  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  ∈  { 𝑓  ∣  𝑓 : ( 1 ... 𝑁 ) –1-1-onto→ ( 1 ... 𝑁 ) } ) | 
						
							| 327 | 226 326 | opelxpd | ⊢ ( 𝜑  →  〈 ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) ) ,  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) ) 〉  ∈  ( ( ( 0 ..^ 𝐾 )  ↑m  ( 1 ... 𝑁 ) )  ×  { 𝑓  ∣  𝑓 : ( 1 ... 𝑁 ) –1-1-onto→ ( 1 ... 𝑁 ) } ) ) | 
						
							| 328 | 1 | nnnn0d | ⊢ ( 𝜑  →  𝑁  ∈  ℕ0 ) | 
						
							| 329 |  | 0elfz | ⊢ ( 𝑁  ∈  ℕ0  →  0  ∈  ( 0 ... 𝑁 ) ) | 
						
							| 330 | 328 329 | syl | ⊢ ( 𝜑  →  0  ∈  ( 0 ... 𝑁 ) ) | 
						
							| 331 | 327 330 | opelxpd | ⊢ ( 𝜑  →  〈 〈 ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) ) ,  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) ) 〉 ,  0 〉  ∈  ( ( ( ( 0 ..^ 𝐾 )  ↑m  ( 1 ... 𝑁 ) )  ×  { 𝑓  ∣  𝑓 : ( 1 ... 𝑁 ) –1-1-onto→ ( 1 ... 𝑁 ) } )  ×  ( 0 ... 𝑁 ) ) ) | 
						
							| 332 | 1 2 3 4 5 6 | poimirlem19 | ⊢ ( 𝜑  →  𝐹  =  ( 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) )  ↦  ( ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) )  ∘f   +  ( ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( 1 ... ( 𝑦  +  1 ) ) )  ×  { 1 } )  ∪  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( ( ( 𝑦  +  1 )  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) ) ) | 
						
							| 333 |  | elfzle1 | ⊢ ( 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) )  →  0  ≤  𝑦 ) | 
						
							| 334 |  | 0re | ⊢ 0  ∈  ℝ | 
						
							| 335 |  | lenlt | ⊢ ( ( 0  ∈  ℝ  ∧  𝑦  ∈  ℝ )  →  ( 0  ≤  𝑦  ↔  ¬  𝑦  <  0 ) ) | 
						
							| 336 | 334 62 335 | sylancr | ⊢ ( 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) )  →  ( 0  ≤  𝑦  ↔  ¬  𝑦  <  0 ) ) | 
						
							| 337 | 333 336 | mpbid | ⊢ ( 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) )  →  ¬  𝑦  <  0 ) | 
						
							| 338 | 337 | iffalsed | ⊢ ( 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) )  →  if ( 𝑦  <  0 ,  𝑦 ,  ( 𝑦  +  1 ) )  =  ( 𝑦  +  1 ) ) | 
						
							| 339 | 338 | csbeq1d | ⊢ ( 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) )  →  ⦋ if ( 𝑦  <  0 ,  𝑦 ,  ( 𝑦  +  1 ) )  /  𝑗 ⦌ ( ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) )  ∘f   +  ( ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } )  ∪  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) )  =  ⦋ ( 𝑦  +  1 )  /  𝑗 ⦌ ( ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) )  ∘f   +  ( ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } )  ∪  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) ) | 
						
							| 340 |  | ovex | ⊢ ( 𝑦  +  1 )  ∈  V | 
						
							| 341 |  | oveq2 | ⊢ ( 𝑗  =  ( 𝑦  +  1 )  →  ( 1 ... 𝑗 )  =  ( 1 ... ( 𝑦  +  1 ) ) ) | 
						
							| 342 | 341 | imaeq2d | ⊢ ( 𝑗  =  ( 𝑦  +  1 )  →  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( 1 ... 𝑗 ) )  =  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( 1 ... ( 𝑦  +  1 ) ) ) ) | 
						
							| 343 | 342 | xpeq1d | ⊢ ( 𝑗  =  ( 𝑦  +  1 )  →  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } )  =  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( 1 ... ( 𝑦  +  1 ) ) )  ×  { 1 } ) ) | 
						
							| 344 |  | oveq1 | ⊢ ( 𝑗  =  ( 𝑦  +  1 )  →  ( 𝑗  +  1 )  =  ( ( 𝑦  +  1 )  +  1 ) ) | 
						
							| 345 | 344 | oveq1d | ⊢ ( 𝑗  =  ( 𝑦  +  1 )  →  ( ( 𝑗  +  1 ) ... 𝑁 )  =  ( ( ( 𝑦  +  1 )  +  1 ) ... 𝑁 ) ) | 
						
							| 346 | 345 | imaeq2d | ⊢ ( 𝑗  =  ( 𝑦  +  1 )  →  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  =  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( ( ( 𝑦  +  1 )  +  1 ) ... 𝑁 ) ) ) | 
						
							| 347 | 346 | xpeq1d | ⊢ ( 𝑗  =  ( 𝑦  +  1 )  →  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } )  =  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( ( ( 𝑦  +  1 )  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) | 
						
							| 348 | 343 347 | uneq12d | ⊢ ( 𝑗  =  ( 𝑦  +  1 )  →  ( ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } )  ∪  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } ) )  =  ( ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( 1 ... ( 𝑦  +  1 ) ) )  ×  { 1 } )  ∪  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( ( ( 𝑦  +  1 )  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) | 
						
							| 349 | 348 | oveq2d | ⊢ ( 𝑗  =  ( 𝑦  +  1 )  →  ( ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) )  ∘f   +  ( ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } )  ∪  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) )  =  ( ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) )  ∘f   +  ( ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( 1 ... ( 𝑦  +  1 ) ) )  ×  { 1 } )  ∪  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( ( ( 𝑦  +  1 )  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) ) | 
						
							| 350 | 340 349 | csbie | ⊢ ⦋ ( 𝑦  +  1 )  /  𝑗 ⦌ ( ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) )  ∘f   +  ( ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } )  ∪  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) )  =  ( ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) )  ∘f   +  ( ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( 1 ... ( 𝑦  +  1 ) ) )  ×  { 1 } )  ∪  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( ( ( 𝑦  +  1 )  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) | 
						
							| 351 | 339 350 | eqtrdi | ⊢ ( 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) )  →  ⦋ if ( 𝑦  <  0 ,  𝑦 ,  ( 𝑦  +  1 ) )  /  𝑗 ⦌ ( ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) )  ∘f   +  ( ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } )  ∪  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) )  =  ( ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) )  ∘f   +  ( ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( 1 ... ( 𝑦  +  1 ) ) )  ×  { 1 } )  ∪  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( ( ( 𝑦  +  1 )  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) ) | 
						
							| 352 | 351 | mpteq2ia | ⊢ ( 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) )  ↦  ⦋ if ( 𝑦  <  0 ,  𝑦 ,  ( 𝑦  +  1 ) )  /  𝑗 ⦌ ( ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) )  ∘f   +  ( ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } )  ∪  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) )  =  ( 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) )  ↦  ( ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) )  ∘f   +  ( ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( 1 ... ( 𝑦  +  1 ) ) )  ×  { 1 } )  ∪  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( ( ( 𝑦  +  1 )  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) ) | 
						
							| 353 | 332 352 | eqtr4di | ⊢ ( 𝜑  →  𝐹  =  ( 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) )  ↦  ⦋ if ( 𝑦  <  0 ,  𝑦 ,  ( 𝑦  +  1 ) )  /  𝑗 ⦌ ( ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) )  ∘f   +  ( ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } )  ∪  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) ) ) | 
						
							| 354 |  | opex | ⊢ 〈 ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) ) ,  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) ) 〉  ∈  V | 
						
							| 355 | 354 52 | op2ndd | ⊢ ( 𝑡  =  〈 〈 ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) ) ,  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) ) 〉 ,  0 〉  →  ( 2nd  ‘ 𝑡 )  =  0 ) | 
						
							| 356 | 355 | breq2d | ⊢ ( 𝑡  =  〈 〈 ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) ) ,  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) ) 〉 ,  0 〉  →  ( 𝑦  <  ( 2nd  ‘ 𝑡 )  ↔  𝑦  <  0 ) ) | 
						
							| 357 | 356 | ifbid | ⊢ ( 𝑡  =  〈 〈 ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) ) ,  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) ) 〉 ,  0 〉  →  if ( 𝑦  <  ( 2nd  ‘ 𝑡 ) ,  𝑦 ,  ( 𝑦  +  1 ) )  =  if ( 𝑦  <  0 ,  𝑦 ,  ( 𝑦  +  1 ) ) ) | 
						
							| 358 | 354 52 | op1std | ⊢ ( 𝑡  =  〈 〈 ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) ) ,  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) ) 〉 ,  0 〉  →  ( 1st  ‘ 𝑡 )  =  〈 ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) ) ,  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) ) 〉 ) | 
						
							| 359 | 98 | mptex | ⊢ ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) )  ∈  V | 
						
							| 360 | 359 323 | op1std | ⊢ ( ( 1st  ‘ 𝑡 )  =  〈 ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) ) ,  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) ) 〉  →  ( 1st  ‘ ( 1st  ‘ 𝑡 ) )  =  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) ) ) | 
						
							| 361 | 358 360 | syl | ⊢ ( 𝑡  =  〈 〈 ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) ) ,  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) ) 〉 ,  0 〉  →  ( 1st  ‘ ( 1st  ‘ 𝑡 ) )  =  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) ) ) | 
						
							| 362 | 359 323 | op2ndd | ⊢ ( ( 1st  ‘ 𝑡 )  =  〈 ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) ) ,  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) ) 〉  →  ( 2nd  ‘ ( 1st  ‘ 𝑡 ) )  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) ) ) | 
						
							| 363 | 358 362 | syl | ⊢ ( 𝑡  =  〈 〈 ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) ) ,  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) ) 〉 ,  0 〉  →  ( 2nd  ‘ ( 1st  ‘ 𝑡 ) )  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) ) ) | 
						
							| 364 | 363 | imaeq1d | ⊢ ( 𝑡  =  〈 〈 ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) ) ,  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) ) 〉 ,  0 〉  →  ( ( 2nd  ‘ ( 1st  ‘ 𝑡 ) )  “  ( 1 ... 𝑗 ) )  =  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( 1 ... 𝑗 ) ) ) | 
						
							| 365 | 364 | xpeq1d | ⊢ ( 𝑡  =  〈 〈 ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) ) ,  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) ) 〉 ,  0 〉  →  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑡 ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } )  =  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } ) ) | 
						
							| 366 | 363 | imaeq1d | ⊢ ( 𝑡  =  〈 〈 ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) ) ,  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) ) 〉 ,  0 〉  →  ( ( 2nd  ‘ ( 1st  ‘ 𝑡 ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  =  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) ) ) | 
						
							| 367 | 366 | xpeq1d | ⊢ ( 𝑡  =  〈 〈 ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) ) ,  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) ) 〉 ,  0 〉  →  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑡 ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } )  =  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) | 
						
							| 368 | 365 367 | uneq12d | ⊢ ( 𝑡  =  〈 〈 ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) ) ,  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) ) 〉 ,  0 〉  →  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑡 ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑡 ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } ) )  =  ( ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } )  ∪  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) | 
						
							| 369 | 361 368 | oveq12d | ⊢ ( 𝑡  =  〈 〈 ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) ) ,  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) ) 〉 ,  0 〉  →  ( ( 1st  ‘ ( 1st  ‘ 𝑡 ) )  ∘f   +  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑡 ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑡 ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) )  =  ( ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) )  ∘f   +  ( ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } )  ∪  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) ) | 
						
							| 370 | 357 369 | csbeq12dv | ⊢ ( 𝑡  =  〈 〈 ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) ) ,  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) ) 〉 ,  0 〉  →  ⦋ if ( 𝑦  <  ( 2nd  ‘ 𝑡 ) ,  𝑦 ,  ( 𝑦  +  1 ) )  /  𝑗 ⦌ ( ( 1st  ‘ ( 1st  ‘ 𝑡 ) )  ∘f   +  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑡 ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑡 ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) )  =  ⦋ if ( 𝑦  <  0 ,  𝑦 ,  ( 𝑦  +  1 ) )  /  𝑗 ⦌ ( ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) )  ∘f   +  ( ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } )  ∪  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) ) | 
						
							| 371 | 370 | mpteq2dv | ⊢ ( 𝑡  =  〈 〈 ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) ) ,  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) ) 〉 ,  0 〉  →  ( 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) )  ↦  ⦋ if ( 𝑦  <  ( 2nd  ‘ 𝑡 ) ,  𝑦 ,  ( 𝑦  +  1 ) )  /  𝑗 ⦌ ( ( 1st  ‘ ( 1st  ‘ 𝑡 ) )  ∘f   +  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑡 ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑡 ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) )  =  ( 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) )  ↦  ⦋ if ( 𝑦  <  0 ,  𝑦 ,  ( 𝑦  +  1 ) )  /  𝑗 ⦌ ( ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) )  ∘f   +  ( ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } )  ∪  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) ) ) | 
						
							| 372 | 371 | eqeq2d | ⊢ ( 𝑡  =  〈 〈 ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) ) ,  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) ) 〉 ,  0 〉  →  ( 𝐹  =  ( 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) )  ↦  ⦋ if ( 𝑦  <  ( 2nd  ‘ 𝑡 ) ,  𝑦 ,  ( 𝑦  +  1 ) )  /  𝑗 ⦌ ( ( 1st  ‘ ( 1st  ‘ 𝑡 ) )  ∘f   +  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑡 ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } )  ∪  ( ( ( 2nd  ‘ ( 1st  ‘ 𝑡 ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) )  ↔  𝐹  =  ( 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) )  ↦  ⦋ if ( 𝑦  <  0 ,  𝑦 ,  ( 𝑦  +  1 ) )  /  𝑗 ⦌ ( ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) )  ∘f   +  ( ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } )  ∪  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) ) ) ) | 
						
							| 373 | 372 2 | elrab2 | ⊢ ( 〈 〈 ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) ) ,  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) ) 〉 ,  0 〉  ∈  𝑆  ↔  ( 〈 〈 ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) ) ,  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) ) 〉 ,  0 〉  ∈  ( ( ( ( 0 ..^ 𝐾 )  ↑m  ( 1 ... 𝑁 ) )  ×  { 𝑓  ∣  𝑓 : ( 1 ... 𝑁 ) –1-1-onto→ ( 1 ... 𝑁 ) } )  ×  ( 0 ... 𝑁 ) )  ∧  𝐹  =  ( 𝑦  ∈  ( 0 ... ( 𝑁  −  1 ) )  ↦  ⦋ if ( 𝑦  <  0 ,  𝑦 ,  ( 𝑦  +  1 ) )  /  𝑗 ⦌ ( ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) )  ∘f   +  ( ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( 1 ... 𝑗 ) )  ×  { 1 } )  ∪  ( ( ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) )  “  ( ( 𝑗  +  1 ) ... 𝑁 ) )  ×  { 0 } ) ) ) ) ) ) | 
						
							| 374 | 331 353 373 | sylanbrc | ⊢ ( 𝜑  →  〈 〈 ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) ) ,  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) ) 〉 ,  0 〉  ∈  𝑆 ) | 
						
							| 375 | 354 52 | op2ndd | ⊢ ( 𝑇  =  〈 〈 ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) ) ,  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) ) 〉 ,  0 〉  →  ( 2nd  ‘ 𝑇 )  =  0 ) | 
						
							| 376 | 375 | eqcoms | ⊢ ( 〈 〈 ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) ) ,  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) ) 〉 ,  0 〉  =  𝑇  →  ( 2nd  ‘ 𝑇 )  =  0 ) | 
						
							| 377 | 1 | nnne0d | ⊢ ( 𝜑  →  𝑁  ≠  0 ) | 
						
							| 378 | 377 | necomd | ⊢ ( 𝜑  →  0  ≠  𝑁 ) | 
						
							| 379 |  | neeq1 | ⊢ ( ( 2nd  ‘ 𝑇 )  =  0  →  ( ( 2nd  ‘ 𝑇 )  ≠  𝑁  ↔  0  ≠  𝑁 ) ) | 
						
							| 380 | 378 379 | syl5ibrcom | ⊢ ( 𝜑  →  ( ( 2nd  ‘ 𝑇 )  =  0  →  ( 2nd  ‘ 𝑇 )  ≠  𝑁 ) ) | 
						
							| 381 | 376 380 | syl5 | ⊢ ( 𝜑  →  ( 〈 〈 ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) ) ,  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) ) 〉 ,  0 〉  =  𝑇  →  ( 2nd  ‘ 𝑇 )  ≠  𝑁 ) ) | 
						
							| 382 | 381 | necon2d | ⊢ ( 𝜑  →  ( ( 2nd  ‘ 𝑇 )  =  𝑁  →  〈 〈 ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) ) ,  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) ) 〉 ,  0 〉  ≠  𝑇 ) ) | 
						
							| 383 | 6 382 | mpd | ⊢ ( 𝜑  →  〈 〈 ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) ) ,  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) ) 〉 ,  0 〉  ≠  𝑇 ) | 
						
							| 384 |  | neeq1 | ⊢ ( 𝑧  =  〈 〈 ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) ) ,  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) ) 〉 ,  0 〉  →  ( 𝑧  ≠  𝑇  ↔  〈 〈 ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) ) ,  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) ) 〉 ,  0 〉  ≠  𝑇 ) ) | 
						
							| 385 | 384 | rspcev | ⊢ ( ( 〈 〈 ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) ) ,  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) ) 〉 ,  0 〉  ∈  𝑆  ∧  〈 〈 ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  ( ( ( 1st  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑛 )  −  if ( 𝑛  =  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) ) ‘ 𝑁 ) ,  1 ,  0 ) ) ) ,  ( ( 2nd  ‘ ( 1st  ‘ 𝑇 ) )  ∘  ( 𝑛  ∈  ( 1 ... 𝑁 )  ↦  if ( 𝑛  =  1 ,  𝑁 ,  ( 𝑛  −  1 ) ) ) ) 〉 ,  0 〉  ≠  𝑇 )  →  ∃ 𝑧  ∈  𝑆 𝑧  ≠  𝑇 ) | 
						
							| 386 | 374 383 385 | syl2anc | ⊢ ( 𝜑  →  ∃ 𝑧  ∈  𝑆 𝑧  ≠  𝑇 ) |