| Step |
Hyp |
Ref |
Expression |
| 1 |
|
dfpprod2 |
⊢ pprod ( 𝑅 , 𝑆 ) = ( ( ◡ ( 1st ↾ ( V × V ) ) ∘ ( 𝑅 ∘ ( 1st ↾ ( V × V ) ) ) ) ∩ ( ◡ ( 2nd ↾ ( V × V ) ) ∘ ( 𝑆 ∘ ( 2nd ↾ ( V × V ) ) ) ) ) |
| 2 |
|
dfpprod2 |
⊢ pprod ( ◡ 𝑅 , ◡ 𝑆 ) = ( ( ◡ ( 1st ↾ ( V × V ) ) ∘ ( ◡ 𝑅 ∘ ( 1st ↾ ( V × V ) ) ) ) ∩ ( ◡ ( 2nd ↾ ( V × V ) ) ∘ ( ◡ 𝑆 ∘ ( 2nd ↾ ( V × V ) ) ) ) ) |
| 3 |
2
|
cnveqi |
⊢ ◡ pprod ( ◡ 𝑅 , ◡ 𝑆 ) = ◡ ( ( ◡ ( 1st ↾ ( V × V ) ) ∘ ( ◡ 𝑅 ∘ ( 1st ↾ ( V × V ) ) ) ) ∩ ( ◡ ( 2nd ↾ ( V × V ) ) ∘ ( ◡ 𝑆 ∘ ( 2nd ↾ ( V × V ) ) ) ) ) |
| 4 |
|
cnvin |
⊢ ◡ ( ( ◡ ( 1st ↾ ( V × V ) ) ∘ ( ◡ 𝑅 ∘ ( 1st ↾ ( V × V ) ) ) ) ∩ ( ◡ ( 2nd ↾ ( V × V ) ) ∘ ( ◡ 𝑆 ∘ ( 2nd ↾ ( V × V ) ) ) ) ) = ( ◡ ( ◡ ( 1st ↾ ( V × V ) ) ∘ ( ◡ 𝑅 ∘ ( 1st ↾ ( V × V ) ) ) ) ∩ ◡ ( ◡ ( 2nd ↾ ( V × V ) ) ∘ ( ◡ 𝑆 ∘ ( 2nd ↾ ( V × V ) ) ) ) ) |
| 5 |
|
cnvco1 |
⊢ ◡ ( ◡ ( 1st ↾ ( V × V ) ) ∘ ( ◡ 𝑅 ∘ ( 1st ↾ ( V × V ) ) ) ) = ( ◡ ( ◡ 𝑅 ∘ ( 1st ↾ ( V × V ) ) ) ∘ ( 1st ↾ ( V × V ) ) ) |
| 6 |
|
cnvco1 |
⊢ ◡ ( ◡ 𝑅 ∘ ( 1st ↾ ( V × V ) ) ) = ( ◡ ( 1st ↾ ( V × V ) ) ∘ 𝑅 ) |
| 7 |
6
|
coeq1i |
⊢ ( ◡ ( ◡ 𝑅 ∘ ( 1st ↾ ( V × V ) ) ) ∘ ( 1st ↾ ( V × V ) ) ) = ( ( ◡ ( 1st ↾ ( V × V ) ) ∘ 𝑅 ) ∘ ( 1st ↾ ( V × V ) ) ) |
| 8 |
|
coass |
⊢ ( ( ◡ ( 1st ↾ ( V × V ) ) ∘ 𝑅 ) ∘ ( 1st ↾ ( V × V ) ) ) = ( ◡ ( 1st ↾ ( V × V ) ) ∘ ( 𝑅 ∘ ( 1st ↾ ( V × V ) ) ) ) |
| 9 |
5 7 8
|
3eqtri |
⊢ ◡ ( ◡ ( 1st ↾ ( V × V ) ) ∘ ( ◡ 𝑅 ∘ ( 1st ↾ ( V × V ) ) ) ) = ( ◡ ( 1st ↾ ( V × V ) ) ∘ ( 𝑅 ∘ ( 1st ↾ ( V × V ) ) ) ) |
| 10 |
|
cnvco1 |
⊢ ◡ ( ◡ ( 2nd ↾ ( V × V ) ) ∘ ( ◡ 𝑆 ∘ ( 2nd ↾ ( V × V ) ) ) ) = ( ◡ ( ◡ 𝑆 ∘ ( 2nd ↾ ( V × V ) ) ) ∘ ( 2nd ↾ ( V × V ) ) ) |
| 11 |
|
cnvco1 |
⊢ ◡ ( ◡ 𝑆 ∘ ( 2nd ↾ ( V × V ) ) ) = ( ◡ ( 2nd ↾ ( V × V ) ) ∘ 𝑆 ) |
| 12 |
11
|
coeq1i |
⊢ ( ◡ ( ◡ 𝑆 ∘ ( 2nd ↾ ( V × V ) ) ) ∘ ( 2nd ↾ ( V × V ) ) ) = ( ( ◡ ( 2nd ↾ ( V × V ) ) ∘ 𝑆 ) ∘ ( 2nd ↾ ( V × V ) ) ) |
| 13 |
|
coass |
⊢ ( ( ◡ ( 2nd ↾ ( V × V ) ) ∘ 𝑆 ) ∘ ( 2nd ↾ ( V × V ) ) ) = ( ◡ ( 2nd ↾ ( V × V ) ) ∘ ( 𝑆 ∘ ( 2nd ↾ ( V × V ) ) ) ) |
| 14 |
10 12 13
|
3eqtri |
⊢ ◡ ( ◡ ( 2nd ↾ ( V × V ) ) ∘ ( ◡ 𝑆 ∘ ( 2nd ↾ ( V × V ) ) ) ) = ( ◡ ( 2nd ↾ ( V × V ) ) ∘ ( 𝑆 ∘ ( 2nd ↾ ( V × V ) ) ) ) |
| 15 |
9 14
|
ineq12i |
⊢ ( ◡ ( ◡ ( 1st ↾ ( V × V ) ) ∘ ( ◡ 𝑅 ∘ ( 1st ↾ ( V × V ) ) ) ) ∩ ◡ ( ◡ ( 2nd ↾ ( V × V ) ) ∘ ( ◡ 𝑆 ∘ ( 2nd ↾ ( V × V ) ) ) ) ) = ( ( ◡ ( 1st ↾ ( V × V ) ) ∘ ( 𝑅 ∘ ( 1st ↾ ( V × V ) ) ) ) ∩ ( ◡ ( 2nd ↾ ( V × V ) ) ∘ ( 𝑆 ∘ ( 2nd ↾ ( V × V ) ) ) ) ) |
| 16 |
3 4 15
|
3eqtri |
⊢ ◡ pprod ( ◡ 𝑅 , ◡ 𝑆 ) = ( ( ◡ ( 1st ↾ ( V × V ) ) ∘ ( 𝑅 ∘ ( 1st ↾ ( V × V ) ) ) ) ∩ ( ◡ ( 2nd ↾ ( V × V ) ) ∘ ( 𝑆 ∘ ( 2nd ↾ ( V × V ) ) ) ) ) |
| 17 |
1 16
|
eqtr4i |
⊢ pprod ( 𝑅 , 𝑆 ) = ◡ pprod ( ◡ 𝑅 , ◡ 𝑆 ) |