Proof of Theorem ax11el
| Step | Hyp | Ref
| Expression |
| 1 | | 19.26 1066 |
. . 3
⊢ (∀x(x = z ⋀ x =
w) ↔ (∀x x = z ⋀ ∀x x = w)) |
| 2 | | elequ1 1135 |
. . . . . . . . 9
⊢ (x =
y → (x ∈ x
↔ y ∈ x)) |
| 3 | | elequ2 1136 |
. . . . . . . . 9
⊢ (x =
y → (y ∈ x
↔ y ∈ y)) |
| 4 | 2, 3 | bitrd 527 |
. . . . . . . 8
⊢ (x =
y → (x ∈ x
↔ y ∈ y)) |
| 5 | 4 | adantl 388 |
. . . . . . 7
⊢ ((¬ ∀x x = y ⋀ x =
y) → (x ∈ x
↔ y ∈ y)) |
| 6 | | ax-17 970 |
. . . . . . . . . 10
⊢ (v
∈ v → ∀x v ∈
v) |
| 7 | | ax-17 970 |
. . . . . . . . . 10
⊢ (y
∈ y → ∀v y ∈
y) |
| 8 | | elequ1 1135 |
. . . . . . . . . . 11
⊢ (v =
y → (v ∈ v
↔ y ∈ v)) |
| 9 | | elequ2 1136 |
. . . . . . . . . . 11
⊢ (v =
y → (y ∈ v
↔ y ∈ y)) |
| 10 | 8, 9 | bitrd 527 |
. . . . . . . . . 10
⊢ (v =
y → (v ∈ v
↔ y ∈ y)) |
| 11 | 6, 7, 10 | dvelimfALT 1152 |
. . . . . . . . 9
⊢ (¬ ∀x x = y → (y
∈ y → ∀x y ∈
y)) |
| 12 | 4 | biimprcd 156 |
. . . . . . . . . 10
⊢ (y
∈ y → (x = y →
x ∈ x)) |
| 13 | 12 | 19.20i 991 |
. . . . . . . . 9
⊢ (∀x y ∈
y → ∀x(x = y → x
∈ x)) |
| 14 | 11, 13 | syl6 22 |
. . . . . . . 8
⊢ (¬ ∀x x = y → (y
∈ y → ∀x(x = y → x
∈ x))) |
| 15 | 14 | adantr 389 |
. . . . . . 7
⊢ ((¬ ∀x x = y ⋀ x =
y) → (y ∈ y
→ ∀x(x = y →
x ∈ x))) |
| 16 | 5, 15 | sylbid 203 |
. . . . . 6
⊢ ((¬ ∀x x = y ⋀ x =
y) → (x ∈ x
→ ∀x(x = y →
x ∈ x))) |
| 17 | 16 | adantl 388 |
. . . . 5
⊢ ((∀x(x = z ⋀ x =
w) ⋀ (¬ ∀x x = y ⋀ x =
y)) → (x ∈ x
→ ∀x(x = y →
x ∈ x))) |
| 18 | | elequ1 1135 |
. . . . . . . . 9
⊢ (x =
z → (x ∈ x
↔ z ∈ x)) |
| 19 | | elequ2 1136 |
. . . . . . . . 9
⊢ (x =
w → (z ∈ x
↔ z ∈ w)) |
| 20 | 18, 19 | sylan9bb 539 |
. . . . . . . 8
⊢ ((x =
z ⋀ x = w) →
(x ∈ x ↔ z
∈ w)) |
| 21 | 20 | a4s 983 |
. . . . . . 7
⊢ (∀x(x = z ⋀ x =
w) → (x ∈ x
↔ z ∈ w)) |
| 22 | | hba1 1002 |
. . . . . . . 8
⊢ (∀x(x = z ⋀ x =
w) → ∀x∀x(x = z ⋀ x =
w)) |
| 23 | 21 | imbi2d 611 |
. . . . . . . 8
⊢ (∀x(x = z ⋀ x =
w) → ((x = y →
x ∈ x) ↔ (x =
y → z ∈ w))) |
| 24 | 22, 23 | albid 1103 |
. . . . . . 7
⊢ (∀x(x = z ⋀ x =
w) → (∀x(x = y → x
∈ x) ↔ ∀x(x = y → z
∈ w))) |
| 25 | 21, 24 | imbi12d 625 |
. . . . . 6
⊢ (∀x(x = z ⋀ x =
w) → ((x ∈ x
→ ∀x(x = y →
x ∈ x)) ↔ (z
∈ w → ∀x(x = y → z
∈ w)))) |
| 26 | 25 | adantr 389 |
. . . . 5
⊢ ((∀x(x = z ⋀ x =
w) ⋀ (¬ ∀x x = y ⋀ x =
y)) → ((x ∈ x
→ ∀x(x = y →
x ∈ x)) ↔ (z
∈ w → ∀x(x = y → z
∈ w)))) |
| 27 | 17, 26 | mpbid 195 |
. . . 4
⊢ ((∀x(x = z ⋀ x =
w) ⋀ (¬ ∀x x = y ⋀ x =
y)) → (z ∈ w
→ ∀x(x = y →
z ∈ w))) |
| 28 | 27 | exp32 377 |
. . 3
⊢ (∀x(x = z ⋀ x =
w) → (¬ ∀x x = y → (x =
y → (z ∈ w
→ ∀x(x = y →
z ∈ w))))) |
| 29 | 1, 28 | sylbir 201 |
. 2
⊢ ((∀x x = z ⋀ ∀x x = w) → (¬ ∀x x = y → (x =
y → (z ∈ w
→ ∀x(x = y →
z ∈ w))))) |
| 30 | | elequ1 1135 |
. . . . . . 7
⊢ (x =
y → (x ∈ w
↔ y ∈ w)) |
| 31 | 30 | ad2antll 407 |
. . . . . 6
⊢ ((¬ ∀x x = w ⋀ (¬ ∀x x = y ⋀ x =
y)) → (x ∈ w
↔ y ∈ w)) |
| 32 | | ax-15 1359 |
. . . . . . . . 9
⊢ (¬ ∀x x = y → (¬ ∀x x = w → (y
∈ w → ∀x y ∈
w))) |
| 33 | 32 | impcom 351 |
. . . . . . . 8
⊢ ((¬ ∀x x = w ⋀ ¬ ∀x x = y) → (y
∈ w → ∀x y ∈
w)) |
| 34 | 33 | adantrr 395 |
. . . . . . 7
⊢ ((¬ ∀x x = w ⋀ (¬ ∀x x = y ⋀ x =
y)) → (y ∈ w
→ ∀x y ∈ w)) |
| 35 | 30 | biimprcd 156 |
. . . . . . . 8
⊢ (y
∈ w → (x = y →
x ∈ w)) |
| 36 | 35 | 19.20i 991 |
. . . . . . 7
⊢ (∀x y ∈
w → ∀x(x = y → x
∈ w)) |
| 37 | 34, 36 | syl6 22 |
. . . . . 6
⊢ ((¬ ∀x x = w ⋀ (¬ ∀x x = y ⋀ x =
y)) → (y ∈ w
→ ∀x(x = y →
x ∈ w))) |
| 38 | 31, 37 | sylbid 203 |
. . . . 5
⊢ ((¬ ∀x x = w ⋀ (¬ ∀x x = y ⋀ x =
y)) → (x ∈ w
→ ∀x(x = y →
x ∈ w))) |
| 39 | 38 | adantll 392 |
. . . 4
⊢ (((∀x x = z ⋀ ¬ ∀x x = w) ⋀ (¬ ∀x x = y ⋀ x =
y)) → (x ∈ w
→ ∀x(x = y →
x ∈ w))) |
| 40 | | elequ1 1135 |
. . . . . . 7
⊢ (x =
z → (x ∈ w
↔ z ∈ w)) |
| 41 | 40 | a4s 983 |
. . . . . 6
⊢ (∀x x = z → (x
∈ w ↔ z ∈ w)) |
| 42 | 41 | imbi2d 611 |
. . . . . . 7
⊢ (∀x x = z → ((x =
y → x ∈ w)
↔ (x = y → z
∈ w))) |
| 43 | 42 | dral2 1154 |
. . . . . 6
⊢ (∀x x = z → (∀x(x = y → x
∈ w) ↔ ∀x(x = y → z
∈ w))) |
| 44 | 41, 43 | imbi12d 625 |
. . . . 5
⊢ (∀x x = z → ((x
∈ w → ∀x(x = y → x
∈ w)) ↔ (z ∈ w
→ ∀x(x = y →
z ∈ w)))) |
| 45 | 44 | ad2antrr 404 |
. . . 4
⊢ (((∀x x = z ⋀ ¬ ∀x x = w) ⋀ (¬ ∀x x = y ⋀ x =
y)) → ((x ∈ w
→ ∀x(x = y →
x ∈ w)) ↔ (z
∈ w → ∀x(x = y → z
∈ w)))) |
| 46 | 39, 45 | mpbid 195 |
. . 3
⊢ (((∀x x = z ⋀ ¬ ∀x x = w) ⋀ (¬ ∀x x = y ⋀ x =
y)) → (z ∈ w
→ ∀x(x = y →
z ∈ w))) |
| 47 | 46 | exp32 377 |
. 2
⊢ ((∀x x = z ⋀ ¬ ∀x x = w) → (¬ ∀x x = y → (x =
y → (z ∈ w
→ ∀x(x = y →
z ∈ w))))) |
| 48 | | elequ2 1136 |
. . . . . . 7
⊢ (x =
y → (z ∈ x
↔ z ∈ y)) |
| 49 | 48 | ad2antll 407 |
. . . . . 6
⊢ ((¬ ∀x x = z ⋀ (¬ ∀x x = y ⋀ x =
y)) → (z ∈ x
↔ z ∈ y)) |
| 50 | | ax-15 1359 |
. . . . . . . . 9
⊢ (¬ ∀x x = z → (¬ ∀x x = y → (z
∈ y → ∀x z ∈
y))) |
| 51 | 50 | imp 350 |
. . . . . . . 8
⊢ ((¬ ∀x x = z ⋀ ¬ ∀x x = y) → (z
∈ y → ∀x z ∈
y)) |
| 52 | 51 | adantrr 395 |
. . . . . . 7
⊢ ((¬ ∀x x = z ⋀ (¬ ∀x x = y ⋀ x =
y)) → (z ∈ y
→ ∀x z ∈ y)) |
| 53 | 48 | biimprcd 156 |
. . . . . . . 8
⊢ (z
∈ y → (x = y →
z ∈ x)) |
| 54 | 53 | 19.20i 991 |
. . . . . . 7
⊢ (∀x z ∈
y → ∀x(x = y → z
∈ x)) |
| 55 | 52, 54 | syl6 22 |
. . . . . 6
⊢ ((¬ ∀x x = z ⋀ (¬ ∀x x = y ⋀ x =
y)) → (z ∈ y
→ ∀x(x = y →
z ∈ x))) |
| 56 | 49, 55 | sylbid 203 |
. . . . 5
⊢ ((¬ ∀x x = z ⋀ (¬ ∀x x = y ⋀ x =
y)) → (z ∈ x
→ ∀x(x = y →
z ∈ x))) |
| 57 | 56 | adantlr 393 |
. . . 4
⊢ (((¬ ∀x x = z ⋀ ∀x x = w) ⋀ (¬ ∀x x = y ⋀ x =
y)) → (z ∈ x
→ ∀x(x = y →
z ∈ x))) |
| 58 | 19 | a4s 983 |
. . . . . 6
⊢ (∀x x = w → (z
∈ x ↔ z ∈ w)) |
| 59 | 58 | imbi2d 611 |
. . . . . . 7
⊢ (∀x x = w → ((x =
y → z ∈ x)
↔ (x = y → z
∈ w))) |
| 60 | 59 | dral2 1154 |
. . . . . 6
⊢ (∀x x = w → (∀x(x = y → z
∈ x) ↔ ∀x(x = y → z
∈ w))) |
| 61 | 58, 60 | imbi12d 625 |
. . . . 5
⊢ (∀x x = w → ((z
∈ x → ∀x(x = y → z
∈ x)) ↔ (z ∈ w
→ ∀x(x = y →
z ∈ w)))) |
| 62 | 61 | ad2antlr 405 |
. . . 4
⊢ (((¬ ∀x x = z ⋀ ∀x x = w) ⋀ (¬ ∀x x = y ⋀ x =
y)) → ((z ∈ x
→ ∀x(x = y →
z ∈ x)) ↔ (z
∈ w → ∀x(x = y → z
∈ w)))) |
| 63 | 57, 62 | mpbid 195 |
. . 3
⊢ (((¬ ∀x x = z ⋀ ∀x x = w) ⋀ (¬ ∀x x = y ⋀ x =
y)) → (z ∈ w
→ ∀x(x = y →
z ∈ w))) |
| 64 | 63 | exp32 377 |
. 2
⊢ ((¬ ∀x x = z ⋀ ∀x x = w) → (¬ ∀x x = y → (x =
y → (z ∈ w
→ ∀x(x = y →
z ∈ w))))) |
| 65 | | a9e 1124 |
. . . . 5
⊢ ∃u u = w |
| 66 | | a9e 1124 |
. . . . . . 7
⊢ ∃v v = z |
| 67 | | ax-1 4 |
. . . . . . . . . . 11
⊢ (v
∈ u → (x = y →
v ∈ u)) |
| 68 | 67 | 19.21aiv 1285 |
. . . . . . . . . 10
⊢ (v
∈ u → ∀x(x = y → v
∈ u)) |
| 69 | | elequ1 1135 |
. . . . . . . . . . . . 13
⊢ (v =
z → (v ∈ u
↔ z ∈ u)) |
| 70 | | elequ2 1136 |
. . . . . . . . . . . . 13
⊢ (u =
w → (z ∈ u
↔ z ∈ w)) |
| 71 | 69, 70 | sylan9bb 539 |
. . . . . . . . . . . 12
⊢ ((v =
z ⋀ u = w) →
(v ∈ u ↔ z
∈ w)) |
| 72 | 71 | adantl 388 |
. . . . . . . . . . 11
⊢ (((¬ ∀x x = z ⋀ ¬ ∀x x = w) ⋀ (v =
z ⋀ u = w)) →
(v ∈ u ↔ z
∈ w)) |
| 73 | | dveeq2 1211 |
. . . . . . . . . . . . . . 15
⊢ (¬ ∀x x = z → (v =
z → ∀x v = z)) |
| 74 | | dveeq2 1211 |
. . . . . . . . . . . . . . 15
⊢ (¬ ∀x x = w → (u =
w → ∀x u = w)) |
| 75 | 73, 74 | im2anan9 562 |
. . . . . . . . . . . . . 14
⊢ ((¬ ∀x x = z ⋀ ¬ ∀x x = w) → ((v =
z ⋀ u = w) →
(∀x v = z ⋀
∀x u = w))) |
| 76 | 75 | imp 350 |
. . . . . . . . . . . . 13
⊢ (((¬ ∀x x = z ⋀ ¬ ∀x x = w) ⋀ (v =
z ⋀ u = w)) →
(∀x v = z ⋀
∀x u = w)) |
| 77 | | 19.26 1066 |
. . . . . . . . . . . . 13
⊢ (∀x(v = z ⋀ u =
w) ↔ (∀x v = z ⋀ ∀x u = w)) |
| 78 | 76, 77 | sylibr 200 |
. . . . . . . . . . . 12
⊢ (((¬ ∀x x = z ⋀ ¬ ∀x x = w) ⋀ (v =
z ⋀ u = w)) →
∀x(v = z ⋀
u = w)) |
| 79 | | hba1 1002 |
. . . . . . . . . . . . 13
⊢ (∀x(v = z ⋀ u =
w) → ∀x∀x(v = z ⋀ u =
w)) |
| 80 | 71 | a4s 983 |
. . . . . . . . . . . . . 14
⊢ (∀x(v = z ⋀ u =
w) → (v ∈ u
↔ z ∈ w)) |
| 81 | 80 | imbi2d 611 |
. . . . . . . . . . . . 13
⊢ (∀x(v = z ⋀ u =
w) → ((x = y →
v ∈ u) ↔ (x =
y → z ∈ w))) |
| 82 | 79, 81 | albid 1103 |
. . . . . . . . . . . 12
⊢ (∀x(v = z ⋀ u =
w) → (∀x(x = y → v
∈ u) ↔ ∀x(x = y → z
∈ w))) |
| 83 | 78, 82 | syl 10 |
. . . . . . . . . . 11
⊢ (((¬ ∀x x = z ⋀ ¬ ∀x x = w) ⋀ (v =
z ⋀ u = w)) →
(∀x(x = y →
v ∈ u) ↔ ∀x(x = y → z
∈ w))) |
| 84 | 72, 83 | imbi12d 625 |
. . . . . . . . . 10
⊢ (((¬ ∀x x = z ⋀ ¬ ∀x x = w) ⋀ (v =
z ⋀ u = w)) →
((v ∈ u → ∀x(x = y → v
∈ u)) ↔ (z ∈ w
→ ∀x(x = y →
z ∈ w)))) |
| 85 | 68, 84 | mpbii 193 |
. . . . . . . . 9
⊢ (((¬ ∀x x = z ⋀ ¬ ∀x x = w) ⋀ (v =
z ⋀ u = w)) →
(z ∈ w → ∀x(x = y → z
∈ w))) |
| 86 | 85 | exp32 377 |
. . . . . . . 8
⊢ ((¬ ∀x x = z ⋀ ¬ ∀x x = w) → (v =
z → (u = w →
(z ∈ w → ∀x(x = y → z
∈ w))))) |
| 87 | 86 | 19.23adv 1213 |
. . . . . . 7
⊢ ((¬ ∀x x = z ⋀ ¬ ∀x x = w) → (∃v v = z → (u =
w → (z ∈ w
→ ∀x(x = y →
z ∈ w))))) |
| 88 | 66, 87 | mpi 44 |
. . . . . 6
⊢ ((¬ ∀x x = z ⋀ ¬ ∀x x = w) → (u =
w → (z ∈ w
→ ∀x(x = y →
z ∈ w)))) |
| 89 | 88 | 19.23adv 1213 |
. . . . 5
⊢ ((¬ ∀x x = z ⋀ ¬ ∀x x = w) → (∃u u = w → (z
∈ w → ∀x(x = y → z
∈ w)))) |
| 90 | 65, 89 | mpi 44 |
. . . 4
⊢ ((¬ ∀x x = z ⋀ ¬ ∀x x = w) → (z
∈ w → ∀x(x = y → z
∈ w))) |
| 91 | 90 | a1d 12 |
. . 3
⊢ ((¬ ∀x x = z ⋀ ¬ ∀x x = w) → (x =
y → (z ∈ w
→ ∀x(x = y →
z ∈ w)))) |
| 92 | 91 | a1d 12 |
. 2
⊢ ((¬ ∀x x = z ⋀ ¬ ∀x x = w) → (¬ ∀x x = y → (x =
y → (z ∈ w
→ ∀x(x = y →
z ∈ w))))) |
| 93 | 29, 47, 64, 92 | 4cases 757 |
1
⊢ (¬ ∀x x = y → (x =
y → (z ∈ w
→ ∀x(x = y →
z ∈ w)))) |