Proof of Theorem axacndlem4
| Step | Hyp | Ref
| Expression |
| 1 | | axac 4725 |
. . . . 5
⊢ ∃v∀y∀z((y ∈
z ⋀ z ∈ w)
→ ∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ v)) ↔ y = w)) |
| 2 | | ax-4 971 |
. . . . . . . 8
⊢ (∀v(y ∈
z ⋀ z ∈ w)
→ (y ∈ z ⋀ z
∈ w)) |
| 3 | 2 | imim1i 16 |
. . . . . . 7
⊢ (((y
∈ z ⋀ z ∈ w)
→ ∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ v)) ↔ y = w)) →
(∀v(y ∈ z
⋀ z ∈ w) → ∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ v)) ↔ y = w))) |
| 4 | 3 | 19.20i2 991 |
. . . . . 6
⊢ (∀y∀z((y ∈
z ⋀ z ∈ w)
→ ∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ v)) ↔ y = w)) →
∀y∀z(∀v(y ∈
z ⋀ z ∈ w)
→ ∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ v)) ↔ y = w))) |
| 5 | 4 | 19.22i 1038 |
. . . . 5
⊢ (∃v∀y∀z((y ∈
z ⋀ z ∈ w)
→ ∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ v)) ↔ y = w)) →
∃v∀y∀z(∀v(y ∈
z ⋀ z ∈ w)
→ ∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ v)) ↔ y = w))) |
| 6 | 1, 5 | ax-mp 7 |
. . . 4
⊢ ∃v∀y∀z(∀v(y ∈
z ⋀ z ∈ w)
→ ∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ v)) ↔ y = w)) |
| 7 | | hbnae 1145 |
. . . . . 6
⊢ (¬ ∀x x = z → ∀x ¬ ∀x x = z) |
| 8 | | hbnae 1145 |
. . . . . . 7
⊢ (¬ ∀x x = y → ∀x ¬ ∀x x = y) |
| 9 | | hbnae 1145 |
. . . . . . 7
⊢ (¬ ∀x x = w → ∀x ¬ ∀x x = w) |
| 10 | 8, 9 | hban 1007 |
. . . . . 6
⊢ ((¬ ∀x x = y ⋀ ¬ ∀x x = w) → ∀x(¬ ∀x x = y ⋀ ¬ ∀x x = w)) |
| 11 | 7, 10 | hban 1007 |
. . . . 5
⊢ ((¬ ∀x x = z ⋀ (¬ ∀x x = y ⋀ ¬ ∀x x = w)) → ∀x(¬ ∀x x = z ⋀ (¬ ∀x x = y ⋀ ¬ ∀x x = w))) |
| 12 | | hbnae 1145 |
. . . . . . 7
⊢ (¬ ∀x x = z → ∀y ¬ ∀x x = z) |
| 13 | | hbnae 1145 |
. . . . . . . 8
⊢ (¬ ∀x x = y → ∀y ¬ ∀x x = y) |
| 14 | | hbnae 1145 |
. . . . . . . 8
⊢ (¬ ∀x x = w → ∀y ¬ ∀x x = w) |
| 15 | 13, 14 | hban 1007 |
. . . . . . 7
⊢ ((¬ ∀x x = y ⋀ ¬ ∀x x = w) → ∀y(¬ ∀x x = y ⋀ ¬ ∀x x = w)) |
| 16 | 12, 15 | hban 1007 |
. . . . . 6
⊢ ((¬ ∀x x = z ⋀ (¬ ∀x x = y ⋀ ¬ ∀x x = w)) → ∀y(¬ ∀x x = z ⋀ (¬ ∀x x = y ⋀ ¬ ∀x x = w))) |
| 17 | | hbnae 1145 |
. . . . . . . 8
⊢ (¬ ∀x x = z → ∀z ¬ ∀x x = z) |
| 18 | | hbnae 1145 |
. . . . . . . . 9
⊢ (¬ ∀x x = y → ∀z ¬ ∀x x = y) |
| 19 | | hbnae 1145 |
. . . . . . . . 9
⊢ (¬ ∀x x = w → ∀z ¬ ∀x x = w) |
| 20 | 18, 19 | hban 1007 |
. . . . . . . 8
⊢ ((¬ ∀x x = y ⋀ ¬ ∀x x = w) → ∀z(¬ ∀x x = y ⋀ ¬ ∀x x = w)) |
| 21 | 17, 20 | hban 1007 |
. . . . . . 7
⊢ ((¬ ∀x x = z ⋀ (¬ ∀x x = y ⋀ ¬ ∀x x = w)) → ∀z(¬ ∀x x = z ⋀ (¬ ∀x x = y ⋀ ¬ ∀x x = w))) |
| 22 | | ax-17 969 |
. . . . . . . . 9
⊢ ((¬ ∀x x = z ⋀ (¬ ∀x x = y ⋀ ¬ ∀x x = w)) → ∀v(¬ ∀x x = z ⋀ (¬ ∀x x = y ⋀ ¬ ∀x x = w))) |
| 23 | | ax-15 1358 |
. . . . . . . . . . . 12
⊢ (¬ ∀x x = y → (¬ ∀x x = z → (y
∈ z → ∀x y ∈
z))) |
| 24 | 23 | impcom 351 |
. . . . . . . . . . 11
⊢ ((¬ ∀x x = z ⋀ ¬ ∀x x = y) → (y
∈ z → ∀x y ∈
z)) |
| 25 | 24 | adantrr 395 |
. . . . . . . . . 10
⊢ ((¬ ∀x x = z ⋀ (¬ ∀x x = y ⋀ ¬ ∀x x = w)) → (y
∈ z → ∀x y ∈
z)) |
| 26 | | ax-15 1358 |
. . . . . . . . . . . 12
⊢ (¬ ∀x x = z → (¬ ∀x x = w → (z
∈ w → ∀x z ∈
w))) |
| 27 | 26 | imp 350 |
. . . . . . . . . . 11
⊢ ((¬ ∀x x = z ⋀ ¬ ∀x x = w) → (z
∈ w → ∀x z ∈
w)) |
| 28 | 27 | adantrl 394 |
. . . . . . . . . 10
⊢ ((¬ ∀x x = z ⋀ (¬ ∀x x = y ⋀ ¬ ∀x x = w)) → (z
∈ w → ∀x z ∈
w)) |
| 29 | 25, 28 | hband 1109 |
. . . . . . . . 9
⊢ ((¬ ∀x x = z ⋀ (¬ ∀x x = y ⋀ ¬ ∀x x = w)) → ((y
∈ z ⋀ z ∈ w)
→ ∀x(y ∈ z
⋀ z ∈ w))) |
| 30 | 22, 29 | hbald 1111 |
. . . . . . . 8
⊢ ((¬ ∀x x = z ⋀ (¬ ∀x x = y ⋀ ¬ ∀x x = w)) → (∀v(y ∈
z ⋀ z ∈ w)
→ ∀x∀v(y ∈
z ⋀ z ∈ w))) |
| 31 | | hbnae 1145 |
. . . . . . . . . 10
⊢ (¬ ∀x x = z → ∀w ¬ ∀x x = z) |
| 32 | | hbnae 1145 |
. . . . . . . . . . 11
⊢ (¬ ∀x x = y → ∀w ¬ ∀x x = y) |
| 33 | | hbnae 1145 |
. . . . . . . . . . 11
⊢ (¬ ∀x x = w → ∀w ¬ ∀x x = w) |
| 34 | 32, 33 | hban 1007 |
. . . . . . . . . 10
⊢ ((¬ ∀x x = y ⋀ ¬ ∀x x = w) → ∀w(¬ ∀x x = y ⋀ ¬ ∀x x = w)) |
| 35 | 31, 34 | hban 1007 |
. . . . . . . . 9
⊢ ((¬ ∀x x = z ⋀ (¬ ∀x x = y ⋀ ¬ ∀x x = w)) → ∀w(¬ ∀x x = z ⋀ (¬ ∀x x = y ⋀ ¬ ∀x x = w))) |
| 36 | | ax-15 1358 |
. . . . . . . . . . . . . . . 16
⊢ (¬ ∀x x = y → (¬ ∀x x = w → (y
∈ w → ∀x y ∈
w))) |
| 37 | 36 | imp 350 |
. . . . . . . . . . . . . . 15
⊢ ((¬ ∀x x = y ⋀ ¬ ∀x x = w) → (y
∈ w → ∀x y ∈
w)) |
| 38 | | dveel1 1354 |
. . . . . . . . . . . . . . . 16
⊢ (¬ ∀x x = w → (w
∈ v → ∀x w ∈
v)) |
| 39 | 38 | adantl 388 |
. . . . . . . . . . . . . . 15
⊢ ((¬ ∀x x = y ⋀ ¬ ∀x x = w) → (w
∈ v → ∀x w ∈
v)) |
| 40 | 37, 39 | hband 1109 |
. . . . . . . . . . . . . 14
⊢ ((¬ ∀x x = y ⋀ ¬ ∀x x = w) → ((y
∈ w ⋀ w ∈ v)
→ ∀x(y ∈ w
⋀ w ∈ v))) |
| 41 | 40 | adantl 388 |
. . . . . . . . . . . . 13
⊢ ((¬ ∀x x = z ⋀ (¬ ∀x x = y ⋀ ¬ ∀x x = w)) → ((y
∈ w ⋀ w ∈ v)
→ ∀x(y ∈ w
⋀ w ∈ v))) |
| 42 | 29, 41 | hband 1109 |
. . . . . . . . . . . 12
⊢ ((¬ ∀x x = z ⋀ (¬ ∀x x = y ⋀ ¬ ∀x x = w)) → (((y
∈ z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ v)) → ∀x((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ v)))) |
| 43 | 35, 42 | hbexd 1112 |
. . . . . . . . . . 11
⊢ ((¬ ∀x x = z ⋀ (¬ ∀x x = y ⋀ ¬ ∀x x = w)) → (∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ v)) → ∀x∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ v)))) |
| 44 | | ax-12 966 |
. . . . . . . . . . . . 13
⊢ (¬ ∀x x = y → (¬ ∀x x = w → (y =
w → ∀x y = w))) |
| 45 | 44 | imp 350 |
. . . . . . . . . . . 12
⊢ ((¬ ∀x x = y ⋀ ¬ ∀x x = w) → (y =
w → ∀x y = w)) |
| 46 | 45 | adantl 388 |
. . . . . . . . . . 11
⊢ ((¬ ∀x x = z ⋀ (¬ ∀x x = y ⋀ ¬ ∀x x = w)) → (y =
w → ∀x y = w)) |
| 47 | 11, 43, 46 | hbbid 1110 |
. . . . . . . . . 10
⊢ ((¬ ∀x x = z ⋀ (¬ ∀x x = y ⋀ ¬ ∀x x = w)) → ((∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ v)) ↔ y = w) →
∀x(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ v)) ↔ y = w))) |
| 48 | 16, 47 | hbald 1111 |
. . . . . . . . 9
⊢ ((¬ ∀x x = z ⋀ (¬ ∀x x = y ⋀ ¬ ∀x x = w)) → (∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ v)) ↔ y = w) →
∀x∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ v)) ↔ y = w))) |
| 49 | 35, 48 | hbexd 1112 |
. . . . . . . 8
⊢ ((¬ ∀x x = z ⋀ (¬ ∀x x = y ⋀ ¬ ∀x x = w)) → (∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ v)) ↔ y = w) →
∀x∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ v)) ↔ y = w))) |
| 50 | 11, 30, 49 | hbimd 1108 |
. . . . . . 7
⊢ ((¬ ∀x x = z ⋀ (¬ ∀x x = y ⋀ ¬ ∀x x = w)) → ((∀v(y ∈
z ⋀ z ∈ w)
→ ∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ v)) ↔ y = w)) →
∀x(∀v(y ∈
z ⋀ z ∈ w)
→ ∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ v)) ↔ y = w)))) |
| 51 | 21, 50 | hbald 1111 |
. . . . . 6
⊢ ((¬ ∀x x = z ⋀ (¬ ∀x x = y ⋀ ¬ ∀x x = w)) → (∀z(∀v(y ∈
z ⋀ z ∈ w)
→ ∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ v)) ↔ y = w)) →
∀x∀z(∀v(y ∈
z ⋀ z ∈ w)
→ ∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ v)) ↔ y = w)))) |
| 52 | 16, 51 | hbald 1111 |
. . . . 5
⊢ ((¬ ∀x x = z ⋀ (¬ ∀x x = y ⋀ ¬ ∀x x = w)) → (∀y∀z(∀v(y ∈
z ⋀ z ∈ w)
→ ∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ v)) ↔ y = w)) →
∀x∀y∀z(∀v(y ∈
z ⋀ z ∈ w)
→ ∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ v)) ↔ y = w)))) |
| 53 | | nd5 4922 |
. . . . . . . 8
⊢ (¬ ∀x x = z → (v =
x → ∀z v = x)) |
| 54 | | nd5 4922 |
. . . . . . . . 9
⊢ (¬ ∀x x = y → (v =
x → ∀y v = x)) |
| 55 | 18, 54 | hbald 1111 |
. . . . . . . 8
⊢ (¬ ∀x x = y → (∀z v = x → ∀y∀z
v = x)) |
| 56 | 53, 55 | sylan9 468 |
. . . . . . 7
⊢ ((¬ ∀x x = z ⋀ ¬ ∀x x = y) → (v =
x → ∀y∀z
v = x)) |
| 57 | 56 | adantrr 395 |
. . . . . 6
⊢ ((¬ ∀x x = z ⋀ (¬ ∀x x = y ⋀ ¬ ∀x x = w)) → (v =
x → ∀y∀z
v = x)) |
| 58 | | hba1 1001 |
. . . . . . . . 9
⊢ (∀y∀z
v = x
→ ∀y∀y∀z
v = x) |
| 59 | 16, 58 | hban 1007 |
. . . . . . . 8
⊢ (((¬ ∀x x = z ⋀ (¬ ∀x x = y ⋀ ¬ ∀x x = w)) ⋀ ∀y∀z
v = x)
→ ∀y((¬ ∀x x = z ⋀ (¬ ∀x x = y ⋀ ¬ ∀x x = w)) ⋀ ∀y∀z
v = x)) |
| 60 | | hba2 1011 |
. . . . . . . . . 10
⊢ (∀y∀z
v = x
→ ∀z∀y∀z
v = x) |
| 61 | 21, 60 | hban 1007 |
. . . . . . . . 9
⊢ (((¬ ∀x x = z ⋀ (¬ ∀x x = y ⋀ ¬ ∀x x = w)) ⋀ ∀y∀z
v = x)
→ ∀z((¬ ∀x x = z ⋀ (¬ ∀x x = y ⋀ ¬ ∀x x = w)) ⋀ ∀y∀z
v = x)) |
| 62 | | pm4.2i 171 |
. . . . . . . . . . . . 13
⊢ (v =
x → ((y ∈ z
⋀ z ∈ w) ↔ (y
∈ z ⋀ z ∈ w))) |
| 63 | 62 | a1i 8 |
. . . . . . . . . . . 12
⊢ ((¬ ∀x x = z ⋀ (¬ ∀x x = y ⋀ ¬ ∀x x = w)) → (v =
x → ((y ∈ z
⋀ z ∈ w) ↔ (y
∈ z ⋀ z ∈ w)))) |
| 64 | 11, 29, 63 | cbvald 1318 |
. . . . . . . . . . 11
⊢ ((¬ ∀x x = z ⋀ (¬ ∀x x = y ⋀ ¬ ∀x x = w)) → (∀v(y ∈
z ⋀ z ∈ w)
↔ ∀x(y ∈ z
⋀ z ∈ w))) |
| 65 | 64 | adantr 389 |
. . . . . . . . . 10
⊢ (((¬ ∀x x = z ⋀ (¬ ∀x x = y ⋀ ¬ ∀x x = w)) ⋀ ∀y∀z
v = x)
→ (∀v(y ∈ z
⋀ z ∈ w) ↔ ∀x(y ∈
z ⋀ z ∈ w))) |
| 66 | | nd5 4922 |
. . . . . . . . . . . . . . . 16
⊢ (¬ ∀x x = w → (v =
x → ∀w v = x)) |
| 67 | 14, 66 | 19.20d 994 |
. . . . . . . . . . . . . . 15
⊢ (¬ ∀x x = w → (∀y v = x → ∀y∀w
v = x)) |
| 68 | | ax-4 971 |
. . . . . . . . . . . . . . . 16
⊢ (∀z v = x → v =
x) |
| 69 | 68 | 19.20i 990 |
. . . . . . . . . . . . . . 15
⊢ (∀y∀z
v = x
→ ∀y v = x) |
| 70 | 67, 69 | syl5 21 |
. . . . . . . . . . . . . 14
⊢ (¬ ∀x x = w → (∀y∀z
v = x
→ ∀y∀w v = x)) |
| 71 | 70 | adantl 388 |
. . . . . . . . . . . . 13
⊢ ((¬ ∀x x = y ⋀ ¬ ∀x x = w) → (∀y∀z
v = x
→ ∀y∀w v = x)) |
| 72 | 71 | imdistani 443 |
. . . . . . . . . . . 12
⊢ (((¬ ∀x x = y ⋀ ¬ ∀x x = w) ⋀ ∀y∀z
v = x)
→ ((¬ ∀x x = y ⋀
¬ ∀x x = w) ⋀
∀y∀w v = x)) |
| 73 | | hba2 1011 |
. . . . . . . . . . . . . 14
⊢ (∀y∀w
v = x
→ ∀w∀y∀w
v = x) |
| 74 | | hba1 1001 |
. . . . . . . . . . . . . . 15
⊢ (∀y∀w
v = x
→ ∀y∀y∀w
v = x) |
| 75 | | hba1 1001 |
. . . . . . . . . . . . . . . . . 18
⊢ (∀w v = x → ∀w∀w
v = x) |
| 76 | | elequ2 1135 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ (v =
x → (w ∈ v
↔ w ∈ x)) |
| 77 | 76 | anbi2d 615 |
. . . . . . . . . . . . . . . . . . . 20
⊢ (v =
x → ((y ∈ w
⋀ w ∈ v) ↔ (y
∈ w ⋀ w ∈ x))) |
| 78 | 77 | anbi2d 615 |
. . . . . . . . . . . . . . . . . . 19
⊢ (v =
x → (((y ∈ z
⋀ z ∈ w) ⋀ (y
∈ w ⋀ w ∈ v))
↔ ((y ∈ z ⋀ z
∈ w) ⋀ (y ∈ w
⋀ w ∈ x)))) |
| 79 | 78 | a4s 982 |
. . . . . . . . . . . . . . . . . 18
⊢ (∀w v = x → (((y
∈ z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ v)) ↔ ((y ∈ z
⋀ z ∈ w) ⋀ (y
∈ w ⋀ w ∈ x)))) |
| 80 | 75, 79 | exbid 1103 |
. . . . . . . . . . . . . . . . 17
⊢ (∀w v = x → (∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ v)) ↔ ∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ x)))) |
| 81 | 80 | bibi1d 618 |
. . . . . . . . . . . . . . . 16
⊢ (∀w v = x → ((∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ v)) ↔ y = w) ↔
(∃w((y ∈ z
⋀ z ∈ w) ⋀ (y
∈ w ⋀ w ∈ x))
↔ y = w))) |
| 82 | 81 | a4s 982 |
. . . . . . . . . . . . . . 15
⊢ (∀y∀w
v = x
→ ((∃w((y ∈ z
⋀ z ∈ w) ⋀ (y
∈ w ⋀ w ∈ v))
↔ y = w) ↔ (∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ x)) ↔ y = w))) |
| 83 | 74, 82 | albid 1102 |
. . . . . . . . . . . . . 14
⊢ (∀y∀w
v = x
→ (∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ v)) ↔ y = w) ↔
∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ x)) ↔ y = w))) |
| 84 | 73, 83 | exbid 1103 |
. . . . . . . . . . . . 13
⊢ (∀y∀w
v = x
→ (∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ v)) ↔ y = w) ↔
∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ x)) ↔ y = w))) |
| 85 | 84 | adantl 388 |
. . . . . . . . . . . 12
⊢ (((¬ ∀x x = y ⋀ ¬ ∀x x = w) ⋀ ∀y∀w
v = x)
→ (∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ v)) ↔ y = w) ↔
∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ x)) ↔ y = w))) |
| 86 | 72, 85 | syl 10 |
. . . . . . . . . . 11
⊢ (((¬ ∀x x = y ⋀ ¬ ∀x x = w) ⋀ ∀y∀z
v = x)
→ (∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ v)) ↔ y = w) ↔
∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ x)) ↔ y = w))) |
| 87 | 86 | adantll 392 |
. . . . . . . . . 10
⊢ (((¬ ∀x x = z ⋀ (¬ ∀x x = y ⋀ ¬ ∀x x = w)) ⋀ ∀y∀z
v = x)
→ (∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ v)) ↔ y = w) ↔
∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ x)) ↔ y = w))) |
| 88 | 65, 87 | imbi12d 625 |
. . . . . . . . 9
⊢ (((¬ ∀x x = z ⋀ (¬ ∀x x = y ⋀ ¬ ∀x x = w)) ⋀ ∀y∀z
v = x)
→ ((∀v(y ∈ z
⋀ z ∈ w) → ∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ v)) ↔ y = w)) ↔
(∀x(y ∈ z
⋀ z ∈ w) → ∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ x)) ↔ y = w)))) |
| 89 | 61, 88 | albid 1102 |
. . . . . . . 8
⊢ (((¬ ∀x x = z ⋀ (¬ ∀x x = y ⋀ ¬ ∀x x = w)) ⋀ ∀y∀z
v = x)
→ (∀z(∀v(y ∈
z ⋀ z ∈ w)
→ ∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ v)) ↔ y = w)) ↔
∀z(∀x(y ∈
z ⋀ z ∈ w)
→ ∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ x)) ↔ y = w)))) |
| 90 | 59, 89 | albid 1102 |
. . . . . . 7
⊢ (((¬ ∀x x = z ⋀ (¬ ∀x x = y ⋀ ¬ ∀x x = w)) ⋀ ∀y∀z
v = x)
→ (∀y∀z(∀v(y ∈
z ⋀ z ∈ w)
→ ∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ v)) ↔ y = w)) ↔
∀y∀z(∀x(y ∈
z ⋀ z ∈ w)
→ ∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ x)) ↔ y = w)))) |
| 91 | 90 | ex 373 |
. . . . . 6
⊢ ((¬ ∀x x = z ⋀ (¬ ∀x x = y ⋀ ¬ ∀x x = w)) → (∀y∀z
v = x
→ (∀y∀z(∀v(y ∈
z ⋀ z ∈ w)
→ ∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ v)) ↔ y = w)) ↔
∀y∀z(∀x(y ∈
z ⋀ z ∈ w)
→ ∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ x)) ↔ y = w))))) |
| 92 | 57, 91 | syld 27 |
. . . . 5
⊢ ((¬ ∀x x = z ⋀ (¬ ∀x x = y ⋀ ¬ ∀x x = w)) → (v =
x → (∀y∀z(∀v(y ∈
z ⋀ z ∈ w)
→ ∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ v)) ↔ y = w)) ↔
∀y∀z(∀x(y ∈
z ⋀ z ∈ w)
→ ∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ x)) ↔ y = w))))) |
| 93 | 11, 52, 92 | cbvexd 1319 |
. . . 4
⊢ ((¬ ∀x x = z ⋀ (¬ ∀x x = y ⋀ ¬ ∀x x = w)) → (∃v∀y∀z(∀v(y ∈
z ⋀ z ∈ w)
→ ∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ v)) ↔ y = w)) ↔
∃x∀y∀z(∀x(y ∈
z ⋀ z ∈ w)
→ ∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ x)) ↔ y = w)))) |
| 94 | 6, 93 | mpbii 193 |
. . 3
⊢ ((¬ ∀x x = z ⋀ (¬ ∀x x = y ⋀ ¬ ∀x x = w)) → ∃x∀y∀z(∀x(y ∈
z ⋀ z ∈ w)
→ ∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ x)) ↔ y = w))) |
| 95 | 94 | exp32 377 |
. 2
⊢ (¬ ∀x x = z → (¬ ∀x x = y → (¬ ∀x x = w → ∃x∀y∀z(∀x(y ∈
z ⋀ z ∈ w)
→ ∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ x)) ↔ y = w))))) |
| 96 | | axacndlem2 4940 |
. 2
⊢ (∀x x = z → ∃x∀y∀z(∀x(y ∈
z ⋀ z ∈ w)
→ ∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ x)) ↔ y = w))) |
| 97 | | axacndlem1 4939 |
. 2
⊢ (∀x x = y → ∃x∀y∀z(∀x(y ∈
z ⋀ z ∈ w)
→ ∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ x)) ↔ y = w))) |
| 98 | | hbae 1143 |
. . . 4
⊢ (∀x x = w → ∀y∀x
x = w) |
| 99 | | hbae 1143 |
. . . . 5
⊢ (∀x x = w → ∀z∀x
x = w) |
| 100 | | nd2 4919 |
. . . . . . 7
⊢ (∀x x = w → ¬ ∀x z ∈
w) |
| 101 | 100 | pm2.21d 78 |
. . . . . 6
⊢ (∀x x = w → (∀x z ∈
w → ∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ x)) ↔ y = w))) |
| 102 | | pm3.27 323 |
. . . . . . 7
⊢ ((y
∈ z ⋀ z ∈ w)
→ z ∈ w) |
| 103 | 102 | 19.20i 990 |
. . . . . 6
⊢ (∀x(y ∈
z ⋀ z ∈ w)
→ ∀x z ∈ w) |
| 104 | 101, 103 | syl5 21 |
. . . . 5
⊢ (∀x x = w → (∀x(y ∈
z ⋀ z ∈ w)
→ ∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ x)) ↔ y = w))) |
| 105 | 99, 104 | 19.21ai 996 |
. . . 4
⊢ (∀x x = w → ∀z(∀x(y ∈
z ⋀ z ∈ w)
→ ∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ x)) ↔ y = w))) |
| 106 | 98, 105 | 19.21ai 996 |
. . 3
⊢ (∀x x = w → ∀y∀z(∀x(y ∈
z ⋀ z ∈ w)
→ ∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ x)) ↔ y = w))) |
| 107 | | 19.8a 1027 |
. . 3
⊢ (∀y∀z(∀x(y ∈
z ⋀ z ∈ w)
→ ∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ x)) ↔ y = w)) →
∃x∀y∀z(∀x(y ∈
z ⋀ z ∈ w)
→ ∃w∀y(∃w((y ∈
z ⋀ z ∈ w)
⋀ (y ∈ w ⋀ w
∈ x)) ↔ y = w))) |
| 108 | 106, 107 | syl 10 |
. 2
⊢ (∀x x = w → ∃x∀y∀z(∀x(y ∈
z ⋀ z ∈ w)
→ ∃w∀y(∃w((y ∈
z ⋀ z |