Proof of Theorem axrepndlem2
| Step | Hyp | Ref
| Expression |
| 1 | | eq6 826 |
. . . . 5
⊢ (¬ ∀x x = y → ∀x ¬ ∀x x = y) |
| 2 | | eq6 826 |
. . . . 5
⊢ (¬ ∀x x = z → ∀x ¬ ∀x x = z) |
| 3 | 1, 2 | hban 704 |
. . . 4
⊢ ((¬ ∀x x = y ∧ ¬ ∀x x = z) → ∀x(¬ ∀x x = y ∧ ¬ ∀x x = z)) |
| 4 | | eq6 826 |
. . . . . . 7
⊢ (¬ ∀x x = y → ∀y ¬ ∀x x = y) |
| 5 | | eq6 826 |
. . . . . . 7
⊢ (¬ ∀x x = z → ∀y ¬ ∀x x = z) |
| 6 | 4, 5 | hban 704 |
. . . . . 6
⊢ ((¬ ∀x x = y ∧ ¬ ∀x x = z) → ∀y(¬ ∀x x = y ∧ ¬ ∀x x = z)) |
| 7 | | eq6 826 |
. . . . . . . 8
⊢ (¬ ∀x x = y → ∀z ¬ ∀x x = y) |
| 8 | | eq6 826 |
. . . . . . . 8
⊢ (¬ ∀x x = z → ∀z ¬ ∀x x = z) |
| 9 | 7, 8 | hban 704 |
. . . . . . 7
⊢ ((¬ ∀x x = y ∧ ¬ ∀x x = z) → ∀z(¬ ∀x x = y ∧ ¬ ∀x x = z)) |
| 10 | | ax-17 925 |
. . . . . . . . . 10
⊢ (φ
→ ∀wφ) |
| 11 | 10 | hbsb3 875 |
. . . . . . . . 9
⊢ ([w /
x]φ
→ ∀x[w / x]φ) |
| 12 | 11 | a1i 7 |
. . . . . . . 8
⊢ ((¬ ∀x x = y ∧ ¬ ∀x x = z) → ([w /
x]φ
→ ∀x[w / x]φ)) |
| 13 | | ax-12 802 |
. . . . . . . . . 10
⊢ (¬ ∀x x = z → (¬ ∀x x = y → (z =
y → ∀x z = y))) |
| 14 | 13 | com12 13 |
. . . . . . . . 9
⊢ (¬ ∀x x = y → (¬ ∀x x = z → (z =
y → ∀x z = y))) |
| 15 | 14 | imp 277 |
. . . . . . . 8
⊢ ((¬ ∀x x = y ∧ ¬ ∀x x = z) → (z =
y → ∀x z = y)) |
| 16 | 3, 12, 15 | hbimd 787 |
. . . . . . 7
⊢ ((¬ ∀x x = y ∧ ¬ ∀x x = z) → (([w /
x]φ
→ z = y) → ∀x([w / x]φ →
z = y))) |
| 17 | 9, 16 | hbald 790 |
. . . . . 6
⊢ ((¬ ∀x x = y ∧ ¬ ∀x x = z) → (∀z([w / x]φ →
z = y)
→ ∀x∀z([w / x]φ →
z = y))) |
| 18 | 6, 17 | hbexd 791 |
. . . . 5
⊢ ((¬ ∀x x = y ∧ ¬ ∀x x = z) → (∃y∀z([w / x]φ →
z = y)
→ ∀x∃y∀z([w / x]φ →
z = y))) |
| 19 | | ddeel1 1003 |
. . . . . . . 8
⊢ (¬ ∀x x = z → (z
∈ w → ∀x z ∈
w)) |
| 20 | 19 | adantl 305 |
. . . . . . 7
⊢ ((¬ ∀x x = y ∧ ¬ ∀x x = z) → (z
∈ w → ∀x z ∈
w)) |
| 21 | | ax-17 925 |
. . . . . . . 8
⊢ ((¬ ∀x x = y ∧ ¬ ∀x x = z) → ∀w(¬ ∀x x = y ∧ ¬ ∀x x = z)) |
| 22 | | ddeel2 1004 |
. . . . . . . . . 10
⊢ (¬ ∀x x = y → (w
∈ y → ∀x w ∈
y)) |
| 23 | 22 | adantr 306 |
. . . . . . . . 9
⊢ ((¬ ∀x x = y ∧ ¬ ∀x x = z) → (w
∈ y → ∀x w ∈
y)) |
| 24 | 6, 12 | hbald 790 |
. . . . . . . . 9
⊢ ((¬ ∀x x = y ∧ ¬ ∀x x = z) → (∀y[w / x]φ →
∀x∀y[w / x]φ)) |
| 25 | 23, 24 | hband 788 |
. . . . . . . 8
⊢ ((¬ ∀x x = y ∧ ¬ ∀x x = z) → ((w
∈ y ∧ ∀y[w / x]φ) →
∀x(w ∈ y ∧
∀y[w / x]φ))) |
| 26 | 21, 25 | hbexd 791 |
. . . . . . 7
⊢ ((¬ ∀x x = y ∧ ¬ ∀x x = z) → (∃w(w ∈
y ∧ ∀y[w / x]φ) →
∀x∃w(w ∈
y ∧ ∀y[w / x]φ))) |
| 27 | 3, 20, 26 | hbbid 789 |
. . . . . 6
⊢ ((¬ ∀x x = y ∧ ¬ ∀x x = z) → ((z
∈ w ↔ ∃w(w ∈
y ∧ ∀y[w / x]φ)) →
∀x(z ∈ w
↔ ∃w(w ∈ y ∧
∀y[w / x]φ)))) |
| 28 | 9, 27 | hbald 790 |
. . . . 5
⊢ ((¬ ∀x x = y ∧ ¬ ∀x x = z) → (∀z(z ∈
w ↔ ∃w(w ∈
y ∧ ∀y[w / x]φ)) →
∀x∀z(z ∈
w ↔ ∃w(w ∈
y ∧ ∀y[w / x]φ)))) |
| 29 | 3, 18, 28 | hbimd 787 |
. . . 4
⊢ ((¬ ∀x x = y ∧ ¬ ∀x x = z) → ((∃y∀z([w / x]φ →
z = y)
→ ∀z(z ∈ w
↔ ∃w(w ∈ y ∧
∀y[w / x]φ))) → ∀x(∃y∀z([w / x]φ →
z = y)
→ ∀z(z ∈ w
↔ ∃w(w ∈ y ∧
∀y[w / x]φ))))) |
| 30 | | nd5 3736 |
. . . . . . . . 9
⊢ (¬ ∀x x = y → (w =
x → ∀y w = x)) |
| 31 | 30 | adantr 306 |
. . . . . . . 8
⊢ ((¬ ∀x x = y ∧ ¬ ∀x x = z) → (w =
x → ∀y w = x)) |
| 32 | 31 | imdistani 340 |
. . . . . . 7
⊢ (((¬ ∀x x = y ∧ ¬ ∀x x = z) ∧ w =
x) → ((¬ ∀x x = y ∧ ¬ ∀x x = z) ∧ ∀y w = x)) |
| 33 | | hba1 698 |
. . . . . . . . 9
⊢ (∀y w = x → ∀y∀y
w = x) |
| 34 | 6, 33 | hban 704 |
. . . . . . . 8
⊢ (((¬ ∀x x = y ∧ ¬ ∀x x = z) ∧ ∀y w = x) → ∀y((¬ ∀x x = y ∧ ¬ ∀x x = z) ∧ ∀y w = x)) |
| 35 | | nd5 3736 |
. . . . . . . . . . 11
⊢ (¬ ∀x x = z → (w =
x → ∀z w = x)) |
| 36 | 35 | imdistani 340 |
. . . . . . . . . 10
⊢ ((¬ ∀x x = z ∧ w =
x) → (¬ ∀x x = z ∧ ∀z w = x)) |
| 37 | | hba1 698 |
. . . . . . . . . . . 12
⊢ (∀z w = x → ∀z∀z
w = x) |
| 38 | 8, 37 | hban 704 |
. . . . . . . . . . 11
⊢ ((¬ ∀x x = z ∧ ∀z w = x) → ∀z(¬ ∀x x = z ∧ ∀z w = x)) |
| 39 | | sbequ12r 866 |
. . . . . . . . . . . . . 14
⊢ (w =
x → ([w / x]φ ↔ φ)) |
| 40 | 39 | imbi1d 465 |
. . . . . . . . . . . . 13
⊢ (w =
x → (([w / x]φ → z = y) ↔
(φ → z = y))) |
| 41 | 40 | a4s 682 |
. . . . . . . . . . . 12
⊢ (∀z w = x → (([w /
x]φ
→ z = y) ↔ (φ
→ z = y))) |
| 42 | 41 | adantl 305 |
. . . . . . . . . . 11
⊢ ((¬ ∀x x = z ∧ ∀z w = x) → (([w /
x]φ
→ z = y) ↔ (φ
→ z = y))) |
| 43 | 38, 42 | biald 782 |
. . . . . . . . . 10
⊢ ((¬ ∀x x = z ∧ ∀z w = x) → (∀z([w / x]φ →
z = y)
↔ ∀z(φ → z = y))) |
| 44 | 36, 43 | syl 12 |
. . . . . . . . 9
⊢ ((¬ ∀x x = z ∧ w =
x) → (∀z([w / x]φ →
z = y)
↔ ∀z(φ → z = y))) |
| 45 | | pm3.27 260 |
. . . . . . . . 9
⊢ ((¬ ∀x x = y ∧ ¬ ∀x x = z) → ¬ ∀x x = z) |
| 46 | | ax-4 673 |
. . . . . . . . 9
⊢ (∀y w = x → w =
x) |
| 47 | 44, 45, 46 | syl2an 349 |
. . . . . . . 8
⊢ (((¬ ∀x x = y ∧ ¬ ∀x x = z) ∧ ∀y w = x) → (∀z([w / x]φ →
z = y)
↔ ∀z(φ → z = y))) |
| 48 | 34, 47 | biexd 783 |
. . . . . . 7
⊢ (((¬ ∀x x = y ∧ ¬ ∀x x = z) ∧ ∀y w = x) → (∃y∀z([w / x]φ →
z = y)
↔ ∃y∀z(φ →
z = y))) |
| 49 | 32, 48 | syl 12 |
. . . . . 6
⊢ (((¬ ∀x x = y ∧ ¬ ∀x x = z) ∧ w =
x) → (∃y∀z([w / x]φ →
z = y)
↔ ∃y∀z(φ →
z = y))) |
| 50 | 35 | adantl 305 |
. . . . . . . 8
⊢ ((¬ ∀x x = y ∧ ¬ ∀x x = z) → (w =
x → ∀z w = x)) |
| 51 | 50 | imdistani 340 |
. . . . . . 7
⊢ (((¬ ∀x x = y ∧ ¬ ∀x x = z) ∧ w =
x) → ((¬ ∀x x = y ∧ ¬ ∀x x = z) ∧ ∀z w = x)) |
| 52 | 9, 37 | hban 704 |
. . . . . . . 8
⊢ (((¬ ∀x x = y ∧ ¬ ∀x x = z) ∧ ∀z w = x) → ∀z((¬ ∀x x = y ∧ ¬ ∀x x = z) ∧ ∀z w = x)) |
| 53 | | a14b 820 |
. . . . . . . . . . 11
⊢ (w =
x → (z ∈ w
↔ z ∈ x)) |
| 54 | 53 | adantl 305 |
. . . . . . . . . 10
⊢ (((¬ ∀x x = y ∧ ¬ ∀x x = z) ∧ w =
x) → (z ∈ w
↔ z ∈ x)) |
| 55 | | a13b 819 |
. . . . . . . . . . . . . . 15
⊢ (w =
x → (w ∈ y
↔ x ∈ y)) |
| 56 | 55 | adantl 305 |
. . . . . . . . . . . . . 14
⊢ (((¬ ∀x x = y ∧ ¬ ∀x x = z) ∧ w =
x) → (w ∈ y
↔ x ∈ y)) |
| 57 | | sbal2 1005 |
. . . . . . . . . . . . . . . . . 18
⊢ (¬ ∀y y = x → ([w /
x]∀yφ ↔
∀y[w / x]φ)) |
| 58 | 57 | eq4ds 823 |
. . . . . . . . . . . . . . . . 17
⊢ (¬ ∀x x = y → ([w /
x]∀yφ ↔
∀y[w / x]φ)) |
| 59 | 58 | bicomd 399 |
. . . . . . . . . . . . . . . 16
⊢ (¬ ∀x x = y → (∀y[w / x]φ ↔
[w / x]∀yφ)) |
| 60 | | sbequ12r 866 |
. . . . . . . . . . . . . . . 16
⊢ (w =
x → ([w / x]∀yφ ↔ ∀yφ)) |
| 61 | 59, 60 | sylan9bb 418 |
. . . . . . . . . . . . . . 15
⊢ ((¬ ∀x x = y ∧ w =
x) → (∀y[w / x]φ ↔
∀yφ)) |
| 62 | 61 | adantlr 310 |
. . . . . . . . . . . . . 14
⊢ (((¬ ∀x x = y ∧ ¬ ∀x x = z) ∧ w =
x) → (∀y[w / x]φ ↔
∀yφ)) |
| 63 | 56, 62 | anbi12d 476 |
. . . . . . . . . . . . 13
⊢ (((¬ ∀x x = y ∧ ¬ ∀x x = z) ∧ w =
x) → ((w ∈ y ∧
∀y[w / x]φ) ↔ (x ∈ y ∧
∀yφ))) |
| 64 | 63 | exp 291 |
. . . . . . . . . . . 12
⊢ ((¬ ∀x x = y ∧ ¬ ∀x x = z) → (w =
x → ((w ∈ y ∧
∀y[w / x]φ) ↔ (x ∈ y ∧
∀yφ)))) |
| 65 | 3, 25, 64 | cbvexd 978 |
. . . . . . . . . . 11
⊢ ((¬ ∀x x = y ∧ ¬ ∀x x = z) → (∃w(w ∈
y ∧ ∀y[w / x]φ) ↔
∃x(x ∈ y ∧
∀yφ))) |
| 66 | 65 | adantr 306 |
. . . . . . . . . 10
⊢ (((¬ ∀x x = y ∧ ¬ ∀x x = z) ∧ w =
x) → (∃w(w ∈
y ∧ ∀y[w / x]φ) ↔
∃x(x ∈ y ∧
∀yφ))) |
| 67 | 54, 66 | bibi12d 477 |
. . . . . . . . 9
⊢ (((¬ ∀x x = y ∧ ¬ ∀x x = z) ∧ w =
x) → ((z ∈ w
↔ ∃w(w ∈ y ∧
∀y[w / x]φ)) ↔ (z ∈ x
↔ ∃x(x ∈ y ∧
∀yφ)))) |
| 68 | | ax-4 673 |
. . . . . . . . 9
⊢ (∀z w = x → w =
x) |
| 69 | 67, 68 | sylan2 346 |
. . . . . . . 8
⊢ (((¬ ∀x x = y ∧ ¬ ∀x x = z) ∧ ∀z w = x) → ((z
∈ w ↔ ∃w(w ∈
y ∧ ∀y[w / x]φ)) ↔
(z ∈ x ↔ ∃x(x ∈
y ∧ ∀yφ)))) |
| 70 | 52, 69 | biald 782 |
. . . . . . 7
⊢ (((¬ ∀x x = y ∧ ¬ ∀x x = z) ∧ ∀z w = x) → (∀z(z ∈
w ↔ ∃w(w ∈
y ∧ ∀y[w / x]φ)) ↔
∀z(z ∈ x
↔ ∃x(x ∈ y ∧
∀yφ)))) |
| 71 | 51, 70 | syl 12 |
. . . . . 6
⊢ (((¬ ∀x x = y ∧ ¬ ∀x x = z) ∧ w =
x) → (∀z(z ∈
w ↔ ∃w(w ∈
y ∧ ∀y[w / x]φ)) ↔
∀z(z ∈ x
↔ ∃x(x ∈ y ∧
∀yφ)))) |
| 72 | 49, 71 | imbi12d 474 |
. . . . 5
⊢ (((¬ ∀x x = y ∧ ¬ ∀x x = z) ∧ w =
x) → ((∃y∀z([w / x]φ →
z = y)
→ ∀z(z ∈ w
↔ ∃w(w ∈ y ∧
∀y[w / x]φ))) ↔ (∃y∀z(φ → z = y) →
∀z(z ∈ x
↔ ∃x(x ∈ y ∧
∀yφ))))) |
| 73 | 72 | exp 291 |
. . . 4
⊢ ((¬ ∀x x = y ∧ ¬ ∀x x = z) → (w =
x → ((∃y∀z([w / x]φ →
z = y)
→ ∀z(z ∈ w
↔ ∃w(w ∈ y ∧
∀y[w / x]φ))) ↔ (∃y∀z(φ → z = y) →
∀z(z ∈ x
↔ ∃x(x ∈ y ∧
∀yφ)))))) |
| 74 | 3, 29, 73 | cbvexd 978 |
. . 3
⊢ ((¬ ∀x x = y ∧ ¬ ∀x x = z) → (∃w(∃y∀z([w / x]φ →
z = y)
→ ∀z(z ∈ w
↔ ∃w(w ∈ y ∧
∀y[w / x]φ))) ↔ ∃x(∃y∀z(φ → z = y) →
∀z(z ∈ x
↔ ∃x(x ∈ y ∧
∀yφ))))) |
| 75 | | axrepndlem1 3738 |
. . 3
⊢ (¬ ∀y y = z → ∃w(∃y∀z([w / x]φ →
z = y)
→ ∀z(z ∈ w
↔ ∃w(w ∈ y ∧
∀y[w / x]φ)))) |
| 76 | 74, 75 | syl5bi 183 |
. 2
⊢ ((¬ ∀x x = y ∧ ¬ ∀x x = z) → (¬ ∀y y = z → ∃x(∃y∀z(φ → z = y) →
∀z(z ∈ x
↔ ∃x(x ∈ y ∧
∀yφ))))) |
| 77 | 76 | imp 277 |
1
⊢ (((¬ ∀x x = y ∧ ¬ ∀x x = z) ∧ ¬ ∀y y = z) → ∃x(∃y∀z(φ → z = y) →
∀z(z ∈ x
↔ ∃x(x ∈ y ∧
∀yφ)))) |