Proof of Theorem climuni
| Step | Hyp | Ref
| Expression |
| 1 | | cleq1 1107 |
. 2
⊢ (A =
if((F ⇝ A ∧ F
⇝ B), A, 0) → (A
= B ↔ if((F ⇝ A
∧ F ⇝ B), A, 0) =
B)) |
| 2 | | cleq2 1110 |
. 2
⊢ (B =
if((F ⇝ A ∧ F
⇝ B), B, 0) → (if((F ⇝ A
∧ F ⇝ B), A, 0) =
B ↔ if((F ⇝ A
∧ F ⇝ B), A, 0) =
if((F ⇝ A ∧ F
⇝ B), B, 0))) |
| 3 | | climuni.1 |
. . . 4
⊢ A
∈ V |
| 4 | | 0cn 4100 |
. . . . 5
⊢ 0 ∈ ℂ |
| 5 | 4 | elisseti 1355 |
. . . 4
⊢ 0 ∈ V |
| 6 | 3, 5 | keepel 1796 |
. . 3
⊢ if((F
⇝ A ∧ F ⇝ B),
A, 0) ∈ V |
| 7 | | climuni.2 |
. . . 4
⊢ B
∈ V |
| 8 | 7, 5 | keepel 1796 |
. . 3
⊢ if((F
⇝ A ∧ F ⇝ B),
B, 0) ∈ V |
| 9 | | climuni.3 |
. . . 4
⊢ F
∈ V |
| 10 | | nnex 4431 |
. . . . 5
⊢ ℕ ∈ V |
| 11 | | snex 1859 |
. . . . 5
⊢ {0} ∈ V |
| 12 | 10, 11 | xpex 2488 |
. . . 4
⊢ (ℕ × {0}) ∈
V |
| 13 | 9, 12 | keepel 1796 |
. . 3
⊢ if((F
⇝ A ∧ F ⇝ B),
F, (ℕ × {0})) ∈
V |
| 14 | | breq2 2066 |
. . . . 5
⊢ (A =
if((F ⇝ A ∧ F
⇝ B), A, 0) → (F
⇝ A ↔ F ⇝ if((F
⇝ A ∧ F ⇝ B),
A, 0))) |
| 15 | 14 | anbi1d 469 |
. . . 4
⊢ (A =
if((F ⇝ A ∧ F
⇝ B), A, 0) → ((F
⇝ A ∧ F ⇝ B)
↔ (F ⇝ if((F ⇝ A
∧ F ⇝ B), A, 0) ∧
F ⇝ B))) |
| 16 | | breq2 2066 |
. . . . 5
⊢ (B =
if((F ⇝ A ∧ F
⇝ B), B, 0) → (F
⇝ B ↔ F ⇝ if((F
⇝ A ∧ F ⇝ B),
B, 0))) |
| 17 | 16 | anbi2d 468 |
. . . 4
⊢ (B =
if((F ⇝ A ∧ F
⇝ B), B, 0) → ((F
⇝ if((F ⇝ A ∧ F
⇝ B), A, 0) ∧ F
⇝ B) ↔ (F ⇝ if((F
⇝ A ∧ F ⇝ B),
A, 0) ∧ F ⇝ if((F
⇝ A ∧ F ⇝ B),
B, 0)))) |
| 18 | | breq1 2065 |
. . . . 5
⊢ (F =
if((F ⇝ A ∧ F
⇝ B), F, (ℕ × {0})) → (F ⇝ if((F
⇝ A ∧ F ⇝ B),
A, 0) ↔ if((F ⇝ A
∧ F ⇝ B), F, (ℕ
× {0})) ⇝ if((F ⇝
A ∧ F ⇝ B),
A, 0))) |
| 19 | | breq1 2065 |
. . . . 5
⊢ (F =
if((F ⇝ A ∧ F
⇝ B), F, (ℕ × {0})) → (F ⇝ if((F
⇝ A ∧ F ⇝ B),
B, 0) ↔ if((F ⇝ A
∧ F ⇝ B), F, (ℕ
× {0})) ⇝ if((F ⇝
A ∧ F ⇝ B),
B, 0))) |
| 20 | 18, 19 | anbi12d 476 |
. . . 4
⊢ (F =
if((F ⇝ A ∧ F
⇝ B), F, (ℕ × {0})) → ((F ⇝ if((F
⇝ A ∧ F ⇝ B),
A, 0) ∧ F ⇝ if((F
⇝ A ∧ F ⇝ B),
B, 0)) ↔ (if((F ⇝ A
∧ F ⇝ B), F, (ℕ
× {0})) ⇝ if((F ⇝
A ∧ F ⇝ B),
A, 0) ∧ if((F ⇝ A
∧ F ⇝ B), F, (ℕ
× {0})) ⇝ if((F ⇝
A ∧ F ⇝ B),
B, 0)))) |
| 21 | | breq2 2066 |
. . . . 5
⊢ (0 = if((F ⇝ A
∧ F ⇝ B), A, 0) →
((ℕ × {0}) ⇝ 0 ↔ (ℕ × {0}) ⇝
if((F ⇝ A ∧ F
⇝ B), A, 0))) |
| 22 | 21 | anbi1d 469 |
. . . 4
⊢ (0 = if((F ⇝ A
∧ F ⇝ B), A, 0) →
(((ℕ × {0}) ⇝ 0 ∧ (ℕ × {0}) ⇝ 0) ↔
((ℕ × {0}) ⇝ if((F
⇝ A ∧ F ⇝ B),
A, 0) ∧ (ℕ × {0}) ⇝
0))) |
| 23 | | breq2 2066 |
. . . . 5
⊢ (0 = if((F ⇝ A
∧ F ⇝ B), B, 0) →
((ℕ × {0}) ⇝ 0 ↔ (ℕ × {0}) ⇝
if((F ⇝ A ∧ F
⇝ B), B, 0))) |
| 24 | 23 | anbi2d 468 |
. . . 4
⊢ (0 = if((F ⇝ A
∧ F ⇝ B), B, 0) →
(((ℕ × {0}) ⇝ if((F
⇝ A ∧ F ⇝ B),
A, 0) ∧ (ℕ × {0}) ⇝
0) ↔ ((ℕ × {0}) ⇝ if((F ⇝ A
∧ F ⇝ B), A, 0) ∧
(ℕ × {0}) ⇝ if((F ⇝
A ∧ F ⇝ B),
B, 0)))) |
| 25 | | breq1 2065 |
. . . . 5
⊢ ((ℕ × {0}) = if((F ⇝ A
∧ F ⇝ B), F, (ℕ
× {0})) → ((ℕ × {0}) ⇝ if((F ⇝ A
∧ F ⇝ B), A, 0) ↔
if((F ⇝ A ∧ F
⇝ B), F, (ℕ × {0})) ⇝ if((F ⇝ A
∧ F ⇝ B), A,
0))) |
| 26 | | breq1 2065 |
. . . . 5
⊢ ((ℕ × {0}) = if((F ⇝ A
∧ F ⇝ B), F, (ℕ
× {0})) → ((ℕ × {0}) ⇝ if((F ⇝ A
∧ F ⇝ B), B, 0) ↔
if((F ⇝ A ∧ F
⇝ B), F, (ℕ × {0})) ⇝ if((F ⇝ A
∧ F ⇝ B), B,
0))) |
| 27 | 25, 26 | anbi12d 476 |
. . . 4
⊢ ((ℕ × {0}) = if((F ⇝ A
∧ F ⇝ B), F, (ℕ
× {0})) → (((ℕ × {0}) ⇝ if((F ⇝ A
∧ F ⇝ B), A, 0) ∧
(ℕ × {0}) ⇝ if((F ⇝
A ∧ F ⇝ B),
B, 0)) ↔ (if((F ⇝ A
∧ F ⇝ B), F, (ℕ
× {0})) ⇝ if((F ⇝
A ∧ F ⇝ B),
A, 0) ∧ if((F ⇝ A
∧ F ⇝ B), F, (ℕ
× {0})) ⇝ if((F ⇝
A ∧ F ⇝ B),
B, 0)))) |
| 28 | | clim0 4882 |
. . . . 5
⊢ (ℕ × {0}) ⇝ 0 |
| 29 | 28, 28 | pm3.2i 234 |
. . . 4
⊢ ((ℕ × {0}) ⇝ 0 ∧
(ℕ × {0}) ⇝ 0) |
| 30 | 15, 17, 20, 22, 24, 27, 29 | elimhyp3v 1792 |
. . 3
⊢ (if((F
⇝ A ∧ F ⇝ B),
F, (ℕ × {0})) ⇝
if((F ⇝ A ∧ F
⇝ B), A, 0) ∧ if((F ⇝ A
∧ F ⇝ B), F, (ℕ
× {0})) ⇝ if((F ⇝
A ∧ F ⇝ B),
B, 0)) |
| 31 | 6, 8, 13, 30 | climunii 4883 |
. 2
⊢ if((F
⇝ A ∧ F ⇝ B),
A, 0) = if((F ⇝ A
∧ F ⇝ B), B,
0) |
| 32 | 1, 2, 31 | dedth2v 1785 |
1
⊢ ((F
⇝ A ∧ F ⇝ B)
→ A = B) |