Step |
Hyp |
Ref |
Expression |
1 |
|
satf0suc.s |
⊢ 𝑆 = ( ∅ Sat ∅ ) |
2 |
1
|
fveq1i |
⊢ ( 𝑆 ‘ suc 𝑁 ) = ( ( ∅ Sat ∅ ) ‘ suc 𝑁 ) |
3 |
2
|
a1i |
⊢ ( 𝑁 ∈ ω → ( 𝑆 ‘ suc 𝑁 ) = ( ( ∅ Sat ∅ ) ‘ suc 𝑁 ) ) |
4 |
|
omsucelsucb |
⊢ ( 𝑁 ∈ ω ↔ suc 𝑁 ∈ suc ω ) |
5 |
|
satf0sucom |
⊢ ( suc 𝑁 ∈ suc ω → ( ( ∅ Sat ∅ ) ‘ suc 𝑁 ) = ( rec ( ( 𝑓 ∈ V ↦ ( 𝑓 ∪ { 〈 𝑥 , 𝑦 〉 ∣ ( 𝑦 = ∅ ∧ ∃ 𝑢 ∈ 𝑓 ( ∃ 𝑣 ∈ 𝑓 𝑥 = ( ( 1st ‘ 𝑢 ) ⊼𝑔 ( 1st ‘ 𝑣 ) ) ∨ ∃ 𝑖 ∈ ω 𝑥 = ∀𝑔 𝑖 ( 1st ‘ 𝑢 ) ) ) } ) ) , { 〈 𝑥 , 𝑦 〉 ∣ ( 𝑦 = ∅ ∧ ∃ 𝑖 ∈ ω ∃ 𝑗 ∈ ω 𝑥 = ( 𝑖 ∈𝑔 𝑗 ) ) } ) ‘ suc 𝑁 ) ) |
6 |
4 5
|
sylbi |
⊢ ( 𝑁 ∈ ω → ( ( ∅ Sat ∅ ) ‘ suc 𝑁 ) = ( rec ( ( 𝑓 ∈ V ↦ ( 𝑓 ∪ { 〈 𝑥 , 𝑦 〉 ∣ ( 𝑦 = ∅ ∧ ∃ 𝑢 ∈ 𝑓 ( ∃ 𝑣 ∈ 𝑓 𝑥 = ( ( 1st ‘ 𝑢 ) ⊼𝑔 ( 1st ‘ 𝑣 ) ) ∨ ∃ 𝑖 ∈ ω 𝑥 = ∀𝑔 𝑖 ( 1st ‘ 𝑢 ) ) ) } ) ) , { 〈 𝑥 , 𝑦 〉 ∣ ( 𝑦 = ∅ ∧ ∃ 𝑖 ∈ ω ∃ 𝑗 ∈ ω 𝑥 = ( 𝑖 ∈𝑔 𝑗 ) ) } ) ‘ suc 𝑁 ) ) |
7 |
|
nnon |
⊢ ( 𝑁 ∈ ω → 𝑁 ∈ On ) |
8 |
|
rdgsuc |
⊢ ( 𝑁 ∈ On → ( rec ( ( 𝑓 ∈ V ↦ ( 𝑓 ∪ { 〈 𝑥 , 𝑦 〉 ∣ ( 𝑦 = ∅ ∧ ∃ 𝑢 ∈ 𝑓 ( ∃ 𝑣 ∈ 𝑓 𝑥 = ( ( 1st ‘ 𝑢 ) ⊼𝑔 ( 1st ‘ 𝑣 ) ) ∨ ∃ 𝑖 ∈ ω 𝑥 = ∀𝑔 𝑖 ( 1st ‘ 𝑢 ) ) ) } ) ) , { 〈 𝑥 , 𝑦 〉 ∣ ( 𝑦 = ∅ ∧ ∃ 𝑖 ∈ ω ∃ 𝑗 ∈ ω 𝑥 = ( 𝑖 ∈𝑔 𝑗 ) ) } ) ‘ suc 𝑁 ) = ( ( 𝑓 ∈ V ↦ ( 𝑓 ∪ { 〈 𝑥 , 𝑦 〉 ∣ ( 𝑦 = ∅ ∧ ∃ 𝑢 ∈ 𝑓 ( ∃ 𝑣 ∈ 𝑓 𝑥 = ( ( 1st ‘ 𝑢 ) ⊼𝑔 ( 1st ‘ 𝑣 ) ) ∨ ∃ 𝑖 ∈ ω 𝑥 = ∀𝑔 𝑖 ( 1st ‘ 𝑢 ) ) ) } ) ) ‘ ( rec ( ( 𝑓 ∈ V ↦ ( 𝑓 ∪ { 〈 𝑥 , 𝑦 〉 ∣ ( 𝑦 = ∅ ∧ ∃ 𝑢 ∈ 𝑓 ( ∃ 𝑣 ∈ 𝑓 𝑥 = ( ( 1st ‘ 𝑢 ) ⊼𝑔 ( 1st ‘ 𝑣 ) ) ∨ ∃ 𝑖 ∈ ω 𝑥 = ∀𝑔 𝑖 ( 1st ‘ 𝑢 ) ) ) } ) ) , { 〈 𝑥 , 𝑦 〉 ∣ ( 𝑦 = ∅ ∧ ∃ 𝑖 ∈ ω ∃ 𝑗 ∈ ω 𝑥 = ( 𝑖 ∈𝑔 𝑗 ) ) } ) ‘ 𝑁 ) ) ) |
9 |
7 8
|
syl |
⊢ ( 𝑁 ∈ ω → ( rec ( ( 𝑓 ∈ V ↦ ( 𝑓 ∪ { 〈 𝑥 , 𝑦 〉 ∣ ( 𝑦 = ∅ ∧ ∃ 𝑢 ∈ 𝑓 ( ∃ 𝑣 ∈ 𝑓 𝑥 = ( ( 1st ‘ 𝑢 ) ⊼𝑔 ( 1st ‘ 𝑣 ) ) ∨ ∃ 𝑖 ∈ ω 𝑥 = ∀𝑔 𝑖 ( 1st ‘ 𝑢 ) ) ) } ) ) , { 〈 𝑥 , 𝑦 〉 ∣ ( 𝑦 = ∅ ∧ ∃ 𝑖 ∈ ω ∃ 𝑗 ∈ ω 𝑥 = ( 𝑖 ∈𝑔 𝑗 ) ) } ) ‘ suc 𝑁 ) = ( ( 𝑓 ∈ V ↦ ( 𝑓 ∪ { 〈 𝑥 , 𝑦 〉 ∣ ( 𝑦 = ∅ ∧ ∃ 𝑢 ∈ 𝑓 ( ∃ 𝑣 ∈ 𝑓 𝑥 = ( ( 1st ‘ 𝑢 ) ⊼𝑔 ( 1st ‘ 𝑣 ) ) ∨ ∃ 𝑖 ∈ ω 𝑥 = ∀𝑔 𝑖 ( 1st ‘ 𝑢 ) ) ) } ) ) ‘ ( rec ( ( 𝑓 ∈ V ↦ ( 𝑓 ∪ { 〈 𝑥 , 𝑦 〉 ∣ ( 𝑦 = ∅ ∧ ∃ 𝑢 ∈ 𝑓 ( ∃ 𝑣 ∈ 𝑓 𝑥 = ( ( 1st ‘ 𝑢 ) ⊼𝑔 ( 1st ‘ 𝑣 ) ) ∨ ∃ 𝑖 ∈ ω 𝑥 = ∀𝑔 𝑖 ( 1st ‘ 𝑢 ) ) ) } ) ) , { 〈 𝑥 , 𝑦 〉 ∣ ( 𝑦 = ∅ ∧ ∃ 𝑖 ∈ ω ∃ 𝑗 ∈ ω 𝑥 = ( 𝑖 ∈𝑔 𝑗 ) ) } ) ‘ 𝑁 ) ) ) |
10 |
|
elelsuc |
⊢ ( 𝑁 ∈ ω → 𝑁 ∈ suc ω ) |
11 |
|
satf0sucom |
⊢ ( 𝑁 ∈ suc ω → ( ( ∅ Sat ∅ ) ‘ 𝑁 ) = ( rec ( ( 𝑓 ∈ V ↦ ( 𝑓 ∪ { 〈 𝑥 , 𝑦 〉 ∣ ( 𝑦 = ∅ ∧ ∃ 𝑢 ∈ 𝑓 ( ∃ 𝑣 ∈ 𝑓 𝑥 = ( ( 1st ‘ 𝑢 ) ⊼𝑔 ( 1st ‘ 𝑣 ) ) ∨ ∃ 𝑖 ∈ ω 𝑥 = ∀𝑔 𝑖 ( 1st ‘ 𝑢 ) ) ) } ) ) , { 〈 𝑥 , 𝑦 〉 ∣ ( 𝑦 = ∅ ∧ ∃ 𝑖 ∈ ω ∃ 𝑗 ∈ ω 𝑥 = ( 𝑖 ∈𝑔 𝑗 ) ) } ) ‘ 𝑁 ) ) |
12 |
10 11
|
syl |
⊢ ( 𝑁 ∈ ω → ( ( ∅ Sat ∅ ) ‘ 𝑁 ) = ( rec ( ( 𝑓 ∈ V ↦ ( 𝑓 ∪ { 〈 𝑥 , 𝑦 〉 ∣ ( 𝑦 = ∅ ∧ ∃ 𝑢 ∈ 𝑓 ( ∃ 𝑣 ∈ 𝑓 𝑥 = ( ( 1st ‘ 𝑢 ) ⊼𝑔 ( 1st ‘ 𝑣 ) ) ∨ ∃ 𝑖 ∈ ω 𝑥 = ∀𝑔 𝑖 ( 1st ‘ 𝑢 ) ) ) } ) ) , { 〈 𝑥 , 𝑦 〉 ∣ ( 𝑦 = ∅ ∧ ∃ 𝑖 ∈ ω ∃ 𝑗 ∈ ω 𝑥 = ( 𝑖 ∈𝑔 𝑗 ) ) } ) ‘ 𝑁 ) ) |
13 |
1
|
eqcomi |
⊢ ( ∅ Sat ∅ ) = 𝑆 |
14 |
13
|
fveq1i |
⊢ ( ( ∅ Sat ∅ ) ‘ 𝑁 ) = ( 𝑆 ‘ 𝑁 ) |
15 |
12 14
|
eqtr3di |
⊢ ( 𝑁 ∈ ω → ( rec ( ( 𝑓 ∈ V ↦ ( 𝑓 ∪ { 〈 𝑥 , 𝑦 〉 ∣ ( 𝑦 = ∅ ∧ ∃ 𝑢 ∈ 𝑓 ( ∃ 𝑣 ∈ 𝑓 𝑥 = ( ( 1st ‘ 𝑢 ) ⊼𝑔 ( 1st ‘ 𝑣 ) ) ∨ ∃ 𝑖 ∈ ω 𝑥 = ∀𝑔 𝑖 ( 1st ‘ 𝑢 ) ) ) } ) ) , { 〈 𝑥 , 𝑦 〉 ∣ ( 𝑦 = ∅ ∧ ∃ 𝑖 ∈ ω ∃ 𝑗 ∈ ω 𝑥 = ( 𝑖 ∈𝑔 𝑗 ) ) } ) ‘ 𝑁 ) = ( 𝑆 ‘ 𝑁 ) ) |
16 |
15
|
fveq2d |
⊢ ( 𝑁 ∈ ω → ( ( 𝑓 ∈ V ↦ ( 𝑓 ∪ { 〈 𝑥 , 𝑦 〉 ∣ ( 𝑦 = ∅ ∧ ∃ 𝑢 ∈ 𝑓 ( ∃ 𝑣 ∈ 𝑓 𝑥 = ( ( 1st ‘ 𝑢 ) ⊼𝑔 ( 1st ‘ 𝑣 ) ) ∨ ∃ 𝑖 ∈ ω 𝑥 = ∀𝑔 𝑖 ( 1st ‘ 𝑢 ) ) ) } ) ) ‘ ( rec ( ( 𝑓 ∈ V ↦ ( 𝑓 ∪ { 〈 𝑥 , 𝑦 〉 ∣ ( 𝑦 = ∅ ∧ ∃ 𝑢 ∈ 𝑓 ( ∃ 𝑣 ∈ 𝑓 𝑥 = ( ( 1st ‘ 𝑢 ) ⊼𝑔 ( 1st ‘ 𝑣 ) ) ∨ ∃ 𝑖 ∈ ω 𝑥 = ∀𝑔 𝑖 ( 1st ‘ 𝑢 ) ) ) } ) ) , { 〈 𝑥 , 𝑦 〉 ∣ ( 𝑦 = ∅ ∧ ∃ 𝑖 ∈ ω ∃ 𝑗 ∈ ω 𝑥 = ( 𝑖 ∈𝑔 𝑗 ) ) } ) ‘ 𝑁 ) ) = ( ( 𝑓 ∈ V ↦ ( 𝑓 ∪ { 〈 𝑥 , 𝑦 〉 ∣ ( 𝑦 = ∅ ∧ ∃ 𝑢 ∈ 𝑓 ( ∃ 𝑣 ∈ 𝑓 𝑥 = ( ( 1st ‘ 𝑢 ) ⊼𝑔 ( 1st ‘ 𝑣 ) ) ∨ ∃ 𝑖 ∈ ω 𝑥 = ∀𝑔 𝑖 ( 1st ‘ 𝑢 ) ) ) } ) ) ‘ ( 𝑆 ‘ 𝑁 ) ) ) |
17 |
|
eqidd |
⊢ ( 𝑁 ∈ ω → ( 𝑓 ∈ V ↦ ( 𝑓 ∪ { 〈 𝑥 , 𝑦 〉 ∣ ( 𝑦 = ∅ ∧ ∃ 𝑢 ∈ 𝑓 ( ∃ 𝑣 ∈ 𝑓 𝑥 = ( ( 1st ‘ 𝑢 ) ⊼𝑔 ( 1st ‘ 𝑣 ) ) ∨ ∃ 𝑖 ∈ ω 𝑥 = ∀𝑔 𝑖 ( 1st ‘ 𝑢 ) ) ) } ) ) = ( 𝑓 ∈ V ↦ ( 𝑓 ∪ { 〈 𝑥 , 𝑦 〉 ∣ ( 𝑦 = ∅ ∧ ∃ 𝑢 ∈ 𝑓 ( ∃ 𝑣 ∈ 𝑓 𝑥 = ( ( 1st ‘ 𝑢 ) ⊼𝑔 ( 1st ‘ 𝑣 ) ) ∨ ∃ 𝑖 ∈ ω 𝑥 = ∀𝑔 𝑖 ( 1st ‘ 𝑢 ) ) ) } ) ) ) |
18 |
|
id |
⊢ ( 𝑓 = ( 𝑆 ‘ 𝑁 ) → 𝑓 = ( 𝑆 ‘ 𝑁 ) ) |
19 |
|
rexeq |
⊢ ( 𝑓 = ( 𝑆 ‘ 𝑁 ) → ( ∃ 𝑣 ∈ 𝑓 𝑥 = ( ( 1st ‘ 𝑢 ) ⊼𝑔 ( 1st ‘ 𝑣 ) ) ↔ ∃ 𝑣 ∈ ( 𝑆 ‘ 𝑁 ) 𝑥 = ( ( 1st ‘ 𝑢 ) ⊼𝑔 ( 1st ‘ 𝑣 ) ) ) ) |
20 |
19
|
orbi1d |
⊢ ( 𝑓 = ( 𝑆 ‘ 𝑁 ) → ( ( ∃ 𝑣 ∈ 𝑓 𝑥 = ( ( 1st ‘ 𝑢 ) ⊼𝑔 ( 1st ‘ 𝑣 ) ) ∨ ∃ 𝑖 ∈ ω 𝑥 = ∀𝑔 𝑖 ( 1st ‘ 𝑢 ) ) ↔ ( ∃ 𝑣 ∈ ( 𝑆 ‘ 𝑁 ) 𝑥 = ( ( 1st ‘ 𝑢 ) ⊼𝑔 ( 1st ‘ 𝑣 ) ) ∨ ∃ 𝑖 ∈ ω 𝑥 = ∀𝑔 𝑖 ( 1st ‘ 𝑢 ) ) ) ) |
21 |
20
|
rexeqbi1dv |
⊢ ( 𝑓 = ( 𝑆 ‘ 𝑁 ) → ( ∃ 𝑢 ∈ 𝑓 ( ∃ 𝑣 ∈ 𝑓 𝑥 = ( ( 1st ‘ 𝑢 ) ⊼𝑔 ( 1st ‘ 𝑣 ) ) ∨ ∃ 𝑖 ∈ ω 𝑥 = ∀𝑔 𝑖 ( 1st ‘ 𝑢 ) ) ↔ ∃ 𝑢 ∈ ( 𝑆 ‘ 𝑁 ) ( ∃ 𝑣 ∈ ( 𝑆 ‘ 𝑁 ) 𝑥 = ( ( 1st ‘ 𝑢 ) ⊼𝑔 ( 1st ‘ 𝑣 ) ) ∨ ∃ 𝑖 ∈ ω 𝑥 = ∀𝑔 𝑖 ( 1st ‘ 𝑢 ) ) ) ) |
22 |
21
|
anbi2d |
⊢ ( 𝑓 = ( 𝑆 ‘ 𝑁 ) → ( ( 𝑦 = ∅ ∧ ∃ 𝑢 ∈ 𝑓 ( ∃ 𝑣 ∈ 𝑓 𝑥 = ( ( 1st ‘ 𝑢 ) ⊼𝑔 ( 1st ‘ 𝑣 ) ) ∨ ∃ 𝑖 ∈ ω 𝑥 = ∀𝑔 𝑖 ( 1st ‘ 𝑢 ) ) ) ↔ ( 𝑦 = ∅ ∧ ∃ 𝑢 ∈ ( 𝑆 ‘ 𝑁 ) ( ∃ 𝑣 ∈ ( 𝑆 ‘ 𝑁 ) 𝑥 = ( ( 1st ‘ 𝑢 ) ⊼𝑔 ( 1st ‘ 𝑣 ) ) ∨ ∃ 𝑖 ∈ ω 𝑥 = ∀𝑔 𝑖 ( 1st ‘ 𝑢 ) ) ) ) ) |
23 |
22
|
opabbidv |
⊢ ( 𝑓 = ( 𝑆 ‘ 𝑁 ) → { 〈 𝑥 , 𝑦 〉 ∣ ( 𝑦 = ∅ ∧ ∃ 𝑢 ∈ 𝑓 ( ∃ 𝑣 ∈ 𝑓 𝑥 = ( ( 1st ‘ 𝑢 ) ⊼𝑔 ( 1st ‘ 𝑣 ) ) ∨ ∃ 𝑖 ∈ ω 𝑥 = ∀𝑔 𝑖 ( 1st ‘ 𝑢 ) ) ) } = { 〈 𝑥 , 𝑦 〉 ∣ ( 𝑦 = ∅ ∧ ∃ 𝑢 ∈ ( 𝑆 ‘ 𝑁 ) ( ∃ 𝑣 ∈ ( 𝑆 ‘ 𝑁 ) 𝑥 = ( ( 1st ‘ 𝑢 ) ⊼𝑔 ( 1st ‘ 𝑣 ) ) ∨ ∃ 𝑖 ∈ ω 𝑥 = ∀𝑔 𝑖 ( 1st ‘ 𝑢 ) ) ) } ) |
24 |
18 23
|
uneq12d |
⊢ ( 𝑓 = ( 𝑆 ‘ 𝑁 ) → ( 𝑓 ∪ { 〈 𝑥 , 𝑦 〉 ∣ ( 𝑦 = ∅ ∧ ∃ 𝑢 ∈ 𝑓 ( ∃ 𝑣 ∈ 𝑓 𝑥 = ( ( 1st ‘ 𝑢 ) ⊼𝑔 ( 1st ‘ 𝑣 ) ) ∨ ∃ 𝑖 ∈ ω 𝑥 = ∀𝑔 𝑖 ( 1st ‘ 𝑢 ) ) ) } ) = ( ( 𝑆 ‘ 𝑁 ) ∪ { 〈 𝑥 , 𝑦 〉 ∣ ( 𝑦 = ∅ ∧ ∃ 𝑢 ∈ ( 𝑆 ‘ 𝑁 ) ( ∃ 𝑣 ∈ ( 𝑆 ‘ 𝑁 ) 𝑥 = ( ( 1st ‘ 𝑢 ) ⊼𝑔 ( 1st ‘ 𝑣 ) ) ∨ ∃ 𝑖 ∈ ω 𝑥 = ∀𝑔 𝑖 ( 1st ‘ 𝑢 ) ) ) } ) ) |
25 |
24
|
adantl |
⊢ ( ( 𝑁 ∈ ω ∧ 𝑓 = ( 𝑆 ‘ 𝑁 ) ) → ( 𝑓 ∪ { 〈 𝑥 , 𝑦 〉 ∣ ( 𝑦 = ∅ ∧ ∃ 𝑢 ∈ 𝑓 ( ∃ 𝑣 ∈ 𝑓 𝑥 = ( ( 1st ‘ 𝑢 ) ⊼𝑔 ( 1st ‘ 𝑣 ) ) ∨ ∃ 𝑖 ∈ ω 𝑥 = ∀𝑔 𝑖 ( 1st ‘ 𝑢 ) ) ) } ) = ( ( 𝑆 ‘ 𝑁 ) ∪ { 〈 𝑥 , 𝑦 〉 ∣ ( 𝑦 = ∅ ∧ ∃ 𝑢 ∈ ( 𝑆 ‘ 𝑁 ) ( ∃ 𝑣 ∈ ( 𝑆 ‘ 𝑁 ) 𝑥 = ( ( 1st ‘ 𝑢 ) ⊼𝑔 ( 1st ‘ 𝑣 ) ) ∨ ∃ 𝑖 ∈ ω 𝑥 = ∀𝑔 𝑖 ( 1st ‘ 𝑢 ) ) ) } ) ) |
26 |
|
fvex |
⊢ ( 𝑆 ‘ 𝑁 ) ∈ V |
27 |
26
|
a1i |
⊢ ( 𝑁 ∈ ω → ( 𝑆 ‘ 𝑁 ) ∈ V ) |
28 |
|
omex |
⊢ ω ∈ V |
29 |
|
satf0suclem |
⊢ ( ( ( 𝑆 ‘ 𝑁 ) ∈ V ∧ ( 𝑆 ‘ 𝑁 ) ∈ V ∧ ω ∈ V ) → { 〈 𝑥 , 𝑦 〉 ∣ ( 𝑦 = ∅ ∧ ∃ 𝑢 ∈ ( 𝑆 ‘ 𝑁 ) ( ∃ 𝑣 ∈ ( 𝑆 ‘ 𝑁 ) 𝑥 = ( ( 1st ‘ 𝑢 ) ⊼𝑔 ( 1st ‘ 𝑣 ) ) ∨ ∃ 𝑖 ∈ ω 𝑥 = ∀𝑔 𝑖 ( 1st ‘ 𝑢 ) ) ) } ∈ V ) |
30 |
26 26 28 29
|
mp3an |
⊢ { 〈 𝑥 , 𝑦 〉 ∣ ( 𝑦 = ∅ ∧ ∃ 𝑢 ∈ ( 𝑆 ‘ 𝑁 ) ( ∃ 𝑣 ∈ ( 𝑆 ‘ 𝑁 ) 𝑥 = ( ( 1st ‘ 𝑢 ) ⊼𝑔 ( 1st ‘ 𝑣 ) ) ∨ ∃ 𝑖 ∈ ω 𝑥 = ∀𝑔 𝑖 ( 1st ‘ 𝑢 ) ) ) } ∈ V |
31 |
26 30
|
unex |
⊢ ( ( 𝑆 ‘ 𝑁 ) ∪ { 〈 𝑥 , 𝑦 〉 ∣ ( 𝑦 = ∅ ∧ ∃ 𝑢 ∈ ( 𝑆 ‘ 𝑁 ) ( ∃ 𝑣 ∈ ( 𝑆 ‘ 𝑁 ) 𝑥 = ( ( 1st ‘ 𝑢 ) ⊼𝑔 ( 1st ‘ 𝑣 ) ) ∨ ∃ 𝑖 ∈ ω 𝑥 = ∀𝑔 𝑖 ( 1st ‘ 𝑢 ) ) ) } ) ∈ V |
32 |
31
|
a1i |
⊢ ( 𝑁 ∈ ω → ( ( 𝑆 ‘ 𝑁 ) ∪ { 〈 𝑥 , 𝑦 〉 ∣ ( 𝑦 = ∅ ∧ ∃ 𝑢 ∈ ( 𝑆 ‘ 𝑁 ) ( ∃ 𝑣 ∈ ( 𝑆 ‘ 𝑁 ) 𝑥 = ( ( 1st ‘ 𝑢 ) ⊼𝑔 ( 1st ‘ 𝑣 ) ) ∨ ∃ 𝑖 ∈ ω 𝑥 = ∀𝑔 𝑖 ( 1st ‘ 𝑢 ) ) ) } ) ∈ V ) |
33 |
17 25 27 32
|
fvmptd |
⊢ ( 𝑁 ∈ ω → ( ( 𝑓 ∈ V ↦ ( 𝑓 ∪ { 〈 𝑥 , 𝑦 〉 ∣ ( 𝑦 = ∅ ∧ ∃ 𝑢 ∈ 𝑓 ( ∃ 𝑣 ∈ 𝑓 𝑥 = ( ( 1st ‘ 𝑢 ) ⊼𝑔 ( 1st ‘ 𝑣 ) ) ∨ ∃ 𝑖 ∈ ω 𝑥 = ∀𝑔 𝑖 ( 1st ‘ 𝑢 ) ) ) } ) ) ‘ ( 𝑆 ‘ 𝑁 ) ) = ( ( 𝑆 ‘ 𝑁 ) ∪ { 〈 𝑥 , 𝑦 〉 ∣ ( 𝑦 = ∅ ∧ ∃ 𝑢 ∈ ( 𝑆 ‘ 𝑁 ) ( ∃ 𝑣 ∈ ( 𝑆 ‘ 𝑁 ) 𝑥 = ( ( 1st ‘ 𝑢 ) ⊼𝑔 ( 1st ‘ 𝑣 ) ) ∨ ∃ 𝑖 ∈ ω 𝑥 = ∀𝑔 𝑖 ( 1st ‘ 𝑢 ) ) ) } ) ) |
34 |
9 16 33
|
3eqtrd |
⊢ ( 𝑁 ∈ ω → ( rec ( ( 𝑓 ∈ V ↦ ( 𝑓 ∪ { 〈 𝑥 , 𝑦 〉 ∣ ( 𝑦 = ∅ ∧ ∃ 𝑢 ∈ 𝑓 ( ∃ 𝑣 ∈ 𝑓 𝑥 = ( ( 1st ‘ 𝑢 ) ⊼𝑔 ( 1st ‘ 𝑣 ) ) ∨ ∃ 𝑖 ∈ ω 𝑥 = ∀𝑔 𝑖 ( 1st ‘ 𝑢 ) ) ) } ) ) , { 〈 𝑥 , 𝑦 〉 ∣ ( 𝑦 = ∅ ∧ ∃ 𝑖 ∈ ω ∃ 𝑗 ∈ ω 𝑥 = ( 𝑖 ∈𝑔 𝑗 ) ) } ) ‘ suc 𝑁 ) = ( ( 𝑆 ‘ 𝑁 ) ∪ { 〈 𝑥 , 𝑦 〉 ∣ ( 𝑦 = ∅ ∧ ∃ 𝑢 ∈ ( 𝑆 ‘ 𝑁 ) ( ∃ 𝑣 ∈ ( 𝑆 ‘ 𝑁 ) 𝑥 = ( ( 1st ‘ 𝑢 ) ⊼𝑔 ( 1st ‘ 𝑣 ) ) ∨ ∃ 𝑖 ∈ ω 𝑥 = ∀𝑔 𝑖 ( 1st ‘ 𝑢 ) ) ) } ) ) |
35 |
3 6 34
|
3eqtrd |
⊢ ( 𝑁 ∈ ω → ( 𝑆 ‘ suc 𝑁 ) = ( ( 𝑆 ‘ 𝑁 ) ∪ { 〈 𝑥 , 𝑦 〉 ∣ ( 𝑦 = ∅ ∧ ∃ 𝑢 ∈ ( 𝑆 ‘ 𝑁 ) ( ∃ 𝑣 ∈ ( 𝑆 ‘ 𝑁 ) 𝑥 = ( ( 1st ‘ 𝑢 ) ⊼𝑔 ( 1st ‘ 𝑣 ) ) ∨ ∃ 𝑖 ∈ ω 𝑥 = ∀𝑔 𝑖 ( 1st ‘ 𝑢 ) ) ) } ) ) |