Proof of Theorem cmcmlem
| Step | Hyp | Ref
| Expression |
| 1 | | pjoml2.1 |
. . . . . . . . . . . 12
⊢ A
∈ Cℋ |
| 2 | | pjoml2.2 |
. . . . . . . . . . . 12
⊢ B
∈ Cℋ |
| 3 | 1, 2 | chdmj4 5405 |
. . . . . . . . . . 11
⊢ (⊥ ‘((⊥ ‘A) ∨ℋ (⊥ ‘B))) = (A ∩
B) |
| 4 | 1, 2 | chdmj2 5403 |
. . . . . . . . . . 11
⊢ (⊥ ‘((⊥ ‘A) ∨ℋ B)) = (A ∩
(⊥ ‘B)) |
| 5 | 3, 4 | opreq12i 3011 |
. . . . . . . . . 10
⊢ ((⊥ ‘((⊥ ‘A) ∨ℋ (⊥ ‘B))) ∨ℋ (⊥
‘((⊥ ‘A)
∨ℋ B))) = ((A ∩ B)
∨ℋ (A ∩ (⊥
‘B))) |
| 6 | 5 | cleq2i 1111 |
. . . . . . . . 9
⊢ (A =
((⊥ ‘((⊥ ‘A)
∨ℋ (⊥ ‘B)))
∨ℋ (⊥ ‘((⊥ ‘A) ∨ℋ B))) ↔ A =
((A ∩ B) ∨ℋ (A ∩ (⊥ ‘B)))) |
| 7 | 6 | biimpr 134 |
. . . . . . . 8
⊢ (A =
((A ∩ B) ∨ℋ (A ∩ (⊥ ‘B))) → A =
((⊥ ‘((⊥ ‘A)
∨ℋ (⊥ ‘B)))
∨ℋ (⊥ ‘((⊥ ‘A) ∨ℋ B)))) |
| 8 | 7 | fveq2d 2836 |
. . . . . . 7
⊢ (A =
((A ∩ B) ∨ℋ (A ∩ (⊥ ‘B))) → (⊥ ‘A) = (⊥ ‘((⊥ ‘((⊥
‘A) ∨ℋ (⊥
‘B))) ∨ℋ (⊥
‘((⊥ ‘A)
∨ℋ B))))) |
| 9 | 1 | chocl 5192 |
. . . . . . . . 9
⊢ (⊥ ‘A) ∈ Cℋ |
| 10 | 2 | chocl 5192 |
. . . . . . . . 9
⊢ (⊥ ‘B) ∈ Cℋ |
| 11 | 9, 10 | chjcl 5379 |
. . . . . . . 8
⊢ ((⊥ ‘A) ∨ℋ (⊥ ‘B)) ∈ Cℋ |
| 12 | 9, 2 | chjcl 5379 |
. . . . . . . 8
⊢ ((⊥ ‘A) ∨ℋ B) ∈ Cℋ |
| 13 | 11, 12 | chdmj4 5405 |
. . . . . . 7
⊢ (⊥ ‘((⊥ ‘((⊥
‘A) ∨ℋ (⊥
‘B))) ∨ℋ (⊥
‘((⊥ ‘A)
∨ℋ B)))) = (((⊥
‘A) ∨ℋ (⊥
‘B)) ∩ ((⊥ ‘A) ∨ℋ B)) |
| 14 | 8, 13 | syl6req 1141 |
. . . . . 6
⊢ (A =
((A ∩ B) ∨ℋ (A ∩ (⊥ ‘B))) → (((⊥ ‘A) ∨ℋ (⊥ ‘B)) ∩ ((⊥ ‘A) ∨ℋ B)) = (⊥ ‘A)) |
| 15 | 14 | ineq1d 1644 |
. . . . 5
⊢ (A =
((A ∩ B) ∨ℋ (A ∩ (⊥ ‘B))) → ((((⊥ ‘A) ∨ℋ (⊥ ‘B)) ∩ ((⊥ ‘A) ∨ℋ B)) ∩ B) =
((⊥ ‘A) ∩ B)) |
| 16 | 2, 9 | chub2 5391 |
. . . . . . . 8
⊢ B
⊆ ((⊥ ‘A)
∨ℋ B) |
| 17 | | sseqin2 1656 |
. . . . . . . 8
⊢ (B
⊆ ((⊥ ‘A)
∨ℋ B) ↔ (((⊥
‘A) ∨ℋ B) ∩ B) =
B) |
| 18 | 16, 17 | mpbi 164 |
. . . . . . 7
⊢ (((⊥ ‘A) ∨ℋ B) ∩ B) =
B |
| 19 | 18 | ineq2i 1642 |
. . . . . 6
⊢ (((⊥ ‘A) ∨ℋ (⊥ ‘B)) ∩ (((⊥ ‘A) ∨ℋ B) ∩ B)) =
(((⊥ ‘A) ∨ℋ
(⊥ ‘B)) ∩ B) |
| 20 | | inass 1650 |
. . . . . 6
⊢ ((((⊥ ‘A) ∨ℋ (⊥ ‘B)) ∩ ((⊥ ‘A) ∨ℋ B)) ∩ B) =
(((⊥ ‘A) ∨ℋ
(⊥ ‘B)) ∩ (((⊥
‘A) ∨ℋ B) ∩ B)) |
| 21 | 1, 2 | chdmm1 5398 |
. . . . . . 7
⊢ (⊥ ‘(A ∩ B)) =
((⊥ ‘A) ∨ℋ
(⊥ ‘B)) |
| 22 | 21 | ineq1i 1641 |
. . . . . 6
⊢ ((⊥ ‘(A ∩ B))
∩ B) = (((⊥ ‘A) ∨ℋ (⊥ ‘B)) ∩ B) |
| 23 | 19, 20, 22 | 3eqtr4r 1127 |
. . . . 5
⊢ ((⊥ ‘(A ∩ B))
∩ B) = ((((⊥ ‘A) ∨ℋ (⊥ ‘B)) ∩ ((⊥ ‘A) ∨ℋ B)) ∩ B) |
| 24 | 15, 23 | syl5eq 1136 |
. . . 4
⊢ (A =
((A ∩ B) ∨ℋ (A ∩ (⊥ ‘B))) → ((⊥ ‘(A ∩ B))
∩ B) = ((⊥ ‘A) ∩ B)) |
| 25 | 24 | opreq2d 3013 |
. . 3
⊢ (A =
((A ∩ B) ∨ℋ (A ∩ (⊥ ‘B))) → ((A
∩ B) ∨ℋ ((⊥
‘(A ∩ B)) ∩ B)) =
((A ∩ B) ∨ℋ ((⊥ ‘A) ∩ B))) |
| 26 | | inss2 1658 |
. . . 4
⊢ (A
∩ B) ⊆ B |
| 27 | 1, 2 | chincl 5382 |
. . . . 5
⊢ (A
∩ B) ∈
Cℋ |
| 28 | 27, 2 | pjoml2 5495 |
. . . 4
⊢ ((A
∩ B) ⊆ B → ((A
∩ B) ∨ℋ ((⊥
‘(A ∩ B)) ∩ B)) =
B) |
| 29 | 26, 28 | ax-mp 6 |
. . 3
⊢ ((A
∩ B) ∨ℋ ((⊥
‘(A ∩ B)) ∩ B)) =
B |
| 30 | | incom 1636 |
. . . 4
⊢ (A
∩ B) = (B ∩ A) |
| 31 | | incom 1636 |
. . . 4
⊢ ((⊥ ‘A) ∩ B) =
(B ∩ (⊥ ‘A)) |
| 32 | 30, 31 | opreq12i 3011 |
. . 3
⊢ ((A
∩ B) ∨ℋ ((⊥
‘A) ∩ B)) = ((B ∩
A) ∨ℋ (B ∩ (⊥ ‘A))) |
| 33 | 25, 29, 32 | 3eqtr3g 1146 |
. 2
⊢ (A =
((A ∩ B) ∨ℋ (A ∩ (⊥ ‘B))) → B =
((B ∩ A) ∨ℋ (B ∩ (⊥ ‘A)))) |
| 34 | 1, 2 | cmbr 5499 |
. 2
⊢ (A Com
B ↔ A = ((A ∩
B) ∨ℋ (A ∩ (⊥ ‘B)))) |
| 35 | 2, 1 | cmbr 5499 |
. 2
⊢ (B Com
A ↔ B = ((B ∩
A) ∨ℋ (B ∩ (⊥ ‘A)))) |
| 36 | 33, 34, 35 | 3imtr4 192 |
1
⊢ (A Com
B → B Com A) |