| Step | 
						Hyp | 
						Ref | 
						Expression | 
					
						
							| 0 | 
							
								
							 | 
							cusyn | 
							⊢ mUSyn  | 
						
						
							| 1 | 
							
								
							 | 
							vt | 
							⊢ 𝑡  | 
						
						
							| 2 | 
							
								
							 | 
							cvv | 
							⊢ V  | 
						
						
							| 3 | 
							
								
							 | 
							vv | 
							⊢ 𝑣  | 
						
						
							| 4 | 
							
								
							 | 
							cmuv | 
							⊢ mUV  | 
						
						
							| 5 | 
							
								1
							 | 
							cv | 
							⊢ 𝑡  | 
						
						
							| 6 | 
							
								5 4
							 | 
							cfv | 
							⊢ ( mUV ‘ 𝑡 )  | 
						
						
							| 7 | 
							
								
							 | 
							cmsy | 
							⊢ mSyn  | 
						
						
							| 8 | 
							
								5 7
							 | 
							cfv | 
							⊢ ( mSyn ‘ 𝑡 )  | 
						
						
							| 9 | 
							
								
							 | 
							c1st | 
							⊢ 1st   | 
						
						
							| 10 | 
							
								3
							 | 
							cv | 
							⊢ 𝑣  | 
						
						
							| 11 | 
							
								10 9
							 | 
							cfv | 
							⊢ ( 1st  ‘ 𝑣 )  | 
						
						
							| 12 | 
							
								11 8
							 | 
							cfv | 
							⊢ ( ( mSyn ‘ 𝑡 ) ‘ ( 1st  ‘ 𝑣 ) )  | 
						
						
							| 13 | 
							
								
							 | 
							c2nd | 
							⊢ 2nd   | 
						
						
							| 14 | 
							
								10 13
							 | 
							cfv | 
							⊢ ( 2nd  ‘ 𝑣 )  | 
						
						
							| 15 | 
							
								12 14
							 | 
							cop | 
							⊢ 〈 ( ( mSyn ‘ 𝑡 ) ‘ ( 1st  ‘ 𝑣 ) ) ,  ( 2nd  ‘ 𝑣 ) 〉  | 
						
						
							| 16 | 
							
								3 6 15
							 | 
							cmpt | 
							⊢ ( 𝑣  ∈  ( mUV ‘ 𝑡 )  ↦  〈 ( ( mSyn ‘ 𝑡 ) ‘ ( 1st  ‘ 𝑣 ) ) ,  ( 2nd  ‘ 𝑣 ) 〉 )  | 
						
						
							| 17 | 
							
								1 2 16
							 | 
							cmpt | 
							⊢ ( 𝑡  ∈  V  ↦  ( 𝑣  ∈  ( mUV ‘ 𝑡 )  ↦  〈 ( ( mSyn ‘ 𝑡 ) ‘ ( 1st  ‘ 𝑣 ) ) ,  ( 2nd  ‘ 𝑣 ) 〉 ) )  | 
						
						
							| 18 | 
							
								0 17
							 | 
							wceq | 
							⊢ mUSyn  =  ( 𝑡  ∈  V  ↦  ( 𝑣  ∈  ( mUV ‘ 𝑡 )  ↦  〈 ( ( mSyn ‘ 𝑡 ) ‘ ( 1st  ‘ 𝑣 ) ) ,  ( 2nd  ‘ 𝑣 ) 〉 ) )  |