Proof of Theorem infxpidmlem12
| Step | Hyp | Ref
| Expression |
| 1 | | infxpidmlem.1 |
. . 3
⊢ H =
{f∣(f = ∅ ∨ ∃t((ω ≼ t ∧ t
⊆ A) ∧ f:(t ×
t)–1-1-onto→t))} |
| 2 | | infxpidmlem.2 |
. . 3
⊢ A
∈ V |
| 3 | 1, 2 | infxpidmlem9 4941 |
. 2
⊢ ∃g ∈ H
∀h ∈ H ¬ g ⊂
h |
| 4 | 1, 2 | infxpidmlem10 4942 |
. . . . 5
⊢ (∀h ∈ H ¬
g ⊂ h → (ω ≼ A → ¬ g
= ∅)) |
| 5 | | visset 1350 |
. . . . . . . . 9
⊢ g
∈ V |
| 6 | 1, 5 | infxpidmlem2 4934 |
. . . . . . . 8
⊢ (g
∈ H ↔ (g = ∅ ∨ ∃x((ω ≼ x ∧ x
⊆ A) ∧ g:(x ×
x)–1-1-onto→x))) |
| 7 | | df-or 197 |
. . . . . . . 8
⊢ ((g =
∅ ∨ ∃x((ω ≼
x ∧ x ⊆ A)
∧ g:(x × x)–1-1-onto→x)) ↔
(¬ g = ∅ → ∃x((ω ≼ x ∧ x
⊆ A) ∧ g:(x ×
x)–1-1-onto→x))) |
| 8 | 6, 7 | bitr 151 |
. . . . . . 7
⊢ (g
∈ H ↔ (¬ g = ∅ → ∃x((ω ≼ x ∧ x
⊆ A) ∧ g:(x ×
x)–1-1-onto→x))) |
| 9 | | entrt 3319 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ ((((x
× y) ∪ ((y × x)
∪ (y × y))) ≈ x
∧ x ≈ y) → ((x
× y) ∪ ((y × x)
∪ (y × y))) ≈ y) |
| 10 | | entrt 3319 |
. . . . . . . . . . . . . . . . . . . . . . . . 25
⊢ ((x
≈ (x × x) ∧ (x
× x) ≈ (x × y))
→ x ≈ (x × y)) |
| 11 | | visset 1350 |
. . . . . . . . . . . . . . . . . . . . . . . . . . 27
⊢ x
∈ V |
| 12 | 11 | enref 3295 |
. . . . . . . . . . . . . . . . . . . . . . . . . 26
⊢ x
≈ x |
| 13 | | visset 1350 |
. . . . . . . . . . . . . . . . . . . . . . . . . . 27
⊢ y
∈ V |
| 14 | 11, 11, 11, 13 | xpen 3383 |
. . . . . . . . . . . . . . . . . . . . . . . . . 26
⊢ ((x
≈ x ∧ x ≈ y)
→ (x × x) ≈ (x
× y)) |
| 15 | 12, 14 | mpan 518 |
. . . . . . . . . . . . . . . . . . . . . . . . 25
⊢ (x
≈ y → (x × x)
≈ (x × y)) |
| 16 | 10, 15 | sylan2 346 |
. . . . . . . . . . . . . . . . . . . . . . . 24
⊢ ((x
≈ (x × x) ∧ x
≈ y) → x ≈ (x
× y)) |
| 17 | 16 | adantll 309 |
. . . . . . . . . . . . . . . . . . . . . . 23
⊢ (((ω ≼ x ∧ x
≈ (x × x)) ∧ x
≈ y) → x ≈ (x
× y)) |
| 18 | | entrt 3319 |
. . . . . . . . . . . . . . . . . . . . . . . . . . 27
⊢ ((x
≈ (x × x) ∧ (x
× x) ≈ (y × x))
→ x ≈ (y × x)) |
| 19 | 11, 13, 11, 11 | xpen 3383 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . 28
⊢ ((x
≈ y ∧ x ≈ x)
→ (x × x) ≈ (y
× x)) |
| 20 | 12, 19 | mpan2 519 |
. . . . . . . . . . . . . . . . . . . . . . . . . . 27
⊢ (x
≈ y → (x × x)
≈ (y × x)) |
| 21 | 18, 20 | sylan2 346 |
. . . . . . . . . . . . . . . . . . . . . . . . . 26
⊢ ((x
≈ (x × x) ∧ x
≈ y) → x ≈ (y
× x)) |
| 22 | | entrt 3319 |
. . . . . . . . . . . . . . . . . . . . . . . . . . 27
⊢ ((x
≈ (x × x) ∧ (x
× x) ≈ (y × y))
→ x ≈ (y × y)) |
| 23 | 11, 13, 11, 13 | xpen 3383 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . 28
⊢ ((x
≈ y ∧ x ≈ y)
→ (x × x) ≈ (y
× y)) |
| 24 | 23 | anidms 332 |
. . . . . . . . . . . . . . . . . . . . . . . . . . 27
⊢ (x
≈ y → (x × x)
≈ (y × y)) |
| 25 | 22, 24 | sylan2 346 |
. . . . . . . . . . . . . . . . . . . . . . . . . 26
⊢ ((x
≈ (x × x) ∧ x
≈ y) → x ≈ (y
× y)) |
| 26 | 21, 25 | jca 236 |
. . . . . . . . . . . . . . . . . . . . . . . . 25
⊢ ((x
≈ (x × x) ∧ x
≈ y) → (x ≈ (y
× x) ∧ x ≈ (y
× y))) |
| 27 | 26 | adantll 309 |
. . . . . . . . . . . . . . . . . . . . . . . 24
⊢ (((ω ≼ x ∧ x
≈ (x × x)) ∧ x
≈ y) → (x ≈ (y
× x) ∧ x ≈ (y
× y))) |
| 28 | 13, 11 | xpex 2488 |
. . . . . . . . . . . . . . . . . . . . . . . . . 26
⊢ (y
× x) ∈ V |
| 29 | 13, 13 | xpex 2488 |
. . . . . . . . . . . . . . . . . . . . . . . . . 26
⊢ (y
× y) ∈ V |
| 30 | 28, 29 | infxpidmlem1 4933 |
. . . . . . . . . . . . . . . . . . . . . . . . 25
⊢ ((ω ≼ x ∧ x
≈ (x × x)) → ((x
≈ (y × x) ∧ x
≈ (y × y)) → x
≈ ((y × x) ∪ (y
× y)))) |
| 31 | 30 | adantr 306 |
. . . . . . . . . . . . . . . . . . . . . . . 24
⊢ (((ω ≼ x ∧ x
≈ (x × x)) ∧ x
≈ y) → ((x ≈ (y
× x) ∧ x ≈ (y
× y)) → x ≈ ((y
× x) ∪ (y × y)))) |
| 32 | 27, 31 | mpd 46 |
. . . . . . . . . . . . . . . . . . . . . . 23
⊢ (((ω ≼ x ∧ x
≈ (x × x)) ∧ x
≈ y) → x ≈ ((y
× x) ∪ (y × y))) |
| 33 | 11, 13 | xpex 2488 |
. . . . . . . . . . . . . . . . . . . . . . . . 25
⊢ (x
× y) ∈ V |
| 34 | 28, 29 | unex 1949 |
. . . . . . . . . . . . . . . . . . . . . . . . 25
⊢ ((y
× x) ∪ (y × y))
∈ V |
| 35 | 33, 34 | infxpidmlem1 4933 |
. . . . . . . . . . . . . . . . . . . . . . . 24
⊢ ((ω ≼ x ∧ x
≈ (x × x)) → ((x
≈ (x × y) ∧ x
≈ ((y × x) ∪ (y
× y))) → x ≈ ((x
× y) ∪ ((y × x)
∪ (y × y))))) |
| 36 | 35 | adantr 306 |
. . . . . . . . . . . . . . . . . . . . . . 23
⊢ (((ω ≼ x ∧ x
≈ (x × x)) ∧ x
≈ y) → ((x ≈ (x
× y) ∧ x ≈ ((y
× x) ∪ (y × y)))
→ x ≈ ((x × y)
∪ ((y × x) ∪ (y
× y))))) |
| 37 | 17, 32, 36 | mp2and 526 |
. . . . . . . . . . . . . . . . . . . . . 22
⊢ (((ω ≼ x ∧ x
≈ (x × x)) ∧ x
≈ y) → x ≈ ((x
× y) ∪ ((y × x)
∪ (y × y)))) |
| 38 | 33, 34 | unex 1949 |
. . . . . . . . . . . . . . . . . . . . . . 23
⊢ ((x
× y) ∪ ((y × x)
∪ (y × y))) ∈ V |
| 39 | 38 | ensym 3317 |
. . . . . . . . . . . . . . . . . . . . . 22
⊢ (x
≈ ((x × y) ∪ ((y
× x) ∪ (y × y)))
→ ((x × y) ∪ ((y
× x) ∪ (y × y)))
≈ x) |
| 40 | 37, 39 | syl 12 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ (((ω ≼ x ∧ x
≈ (x × x)) ∧ x
≈ y) → ((x × y)
∪ ((y × x) ∪ (y
× y))) ≈ x) |
| 41 | | pm3.27 260 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ (((ω ≼ x ∧ x
≈ (x × x)) ∧ x
≈ y) → x ≈ y) |
| 42 | 9, 40, 41 | sylanc 361 |
. . . . . . . . . . . . . . . . . . . 20
⊢ (((ω ≼ x ∧ x
≈ (x × x)) ∧ x
≈ y) → ((x × y)
∪ ((y × x) ∪ (y
× y))) ≈ y) |
| 43 | 11 | ensym 3317 |
. . . . . . . . . . . . . . . . . . . 20
⊢ ((x
× x) ≈ x → x
≈ (x × x)) |
| 44 | 42, 43 | sylan12 355 |
. . . . . . . . . . . . . . . . . . 19
⊢ (((ω ≼ x ∧ (x
× x) ≈ x) ∧ x
≈ y) → ((x × y)
∪ ((y × x) ∪ (y
× y))) ≈ y) |
| 45 | 13 | bren 3282 |
. . . . . . . . . . . . . . . . . . 19
⊢ (((x
× y) ∪ ((y × x)
∪ (y × y))) ≈ y
↔ ∃u u:((x ×
y) ∪ ((y × x)
∪ (y × y)))–1-1-onto→y) |
| 46 | 44, 45 | sylib 173 |
. . . . . . . . . . . . . . . . . 18
⊢ (((ω ≼ x ∧ (x
× x) ≈ x) ∧ x
≈ y) → ∃u u:((x × y)
∪ ((y × x) ∪ (y
× y)))–1-1-onto→y) |
| 47 | 11, 11 | xpex 2488 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ (x
× x) ∈ V |
| 48 | 47 | f1oen 3301 |
. . . . . . . . . . . . . . . . . . . 20
⊢ (g:(x ×
x)–1-1-onto→x →
(x × x) ≈ x) |
| 49 | 48 | anim2i 270 |
. . . . . . . . . . . . . . . . . . 19
⊢ ((ω ≼ x ∧ g:(x ×
x)–1-1-onto→x) →
(ω ≼ x ∧ (x × x)
≈ x)) |
| 50 | 49 | adantlr 310 |
. . . . . . . . . . . . . . . . . 18
⊢ (((ω ≼ x ∧ x
⊆ A) ∧ g:(x ×
x)–1-1-onto→x) →
(ω ≼ x ∧ (x × x)
≈ x)) |
| 51 | 46, 50 | sylan 343 |
. . . . . . . . . . . . . . . . 17
⊢ ((((ω ≼ x ∧ x
⊆ A) ∧ g:(x ×
x)–1-1-onto→x) ∧
x ≈ y) → ∃u u:((x × y)
∪ ((y × x) ∪ (y
× y)))–1-1-onto→y) |
| 52 | 51 | adantrr 312 |
. . . . . . . . . . . . . . . 16
⊢ ((((ω ≼ x ∧ x
⊆ A) ∧ g:(x ×
x)–1-1-onto→x) ∧
(x ≈ y ∧ y
⊆ (A ∖ x))) → ∃u u:((x × y)
∪ ((y × x) ∪ (y
× y)))–1-1-onto→y) |
| 53 | 1, 2 | infxpidmlem11 4943 |
. . . . . . . . . . . . . . . . . 18
⊢ (((((ω ≼ x ∧ x
⊆ A) ∧ g:(x ×
x)–1-1-onto→x) ∧
(x ≈ y ∧ y
⊆ (A ∖ x))) ∧ u:((x ×
y) ∪ ((y × x)
∪ (y × y)))–1-1-onto→y) →
∃h ∈ H g ⊂
h) |
| 54 | 53 | exp 291 |
. . . . . . . . . . . . . . . . 17
⊢ ((((ω ≼ x ∧ x
⊆ A) ∧ g:(x ×
x)–1-1-onto→x) ∧
(x ≈ y ∧ y
⊆ (A ∖ x))) → (u:((x ×
y) ∪ ((y × x)
∪ (y × y)))–1-1-onto→y →
∃h ∈ H g ⊂
h)) |
| 55 | 54 | 19.23adv 954 |
. . . . . . . . . . . . . . . 16
⊢ ((((ω ≼ x ∧ x
⊆ A) ∧ g:(x ×
x)–1-1-onto→x) ∧
(x ≈ y ∧ y
⊆ (A ∖ x))) → (∃u u:((x × y)
∪ ((y × x) ∪ (y
× y)))–1-1-onto→y →
∃h ∈ H g ⊂
h)) |
| 56 | 52, 55 | mpd 46 |
. . . . . . . . . . . . . . 15
⊢ ((((ω ≼ x ∧ x
⊆ A) ∧ g:(x ×
x)–1-1-onto→x) ∧
(x ≈ y ∧ y
⊆ (A ∖ x))) → ∃h ∈ H
g ⊂ h) |
| 57 | 56 | exp 291 |
. . . . . . . . . . . . . 14
⊢ (((ω ≼ x ∧ x
⊆ A) ∧ g:(x ×
x)–1-1-onto→x) →
((x ≈ y ∧ y
⊆ (A ∖ x)) → ∃h ∈ H
g ⊂ h)) |
| 58 | 57 | 19.23adv 954 |
. . . . . . . . . . . . 13
⊢ (((ω ≼ x ∧ x
⊆ A) ∧ g:(x ×
x)–1-1-onto→x) →
(∃y(x ≈ y
∧ y ⊆ (A ∖ x))
→ ∃h ∈ H g ⊂
h)) |
| 59 | | difexg 1703 |
. . . . . . . . . . . . . . 15
⊢ (A
∈ V → (A ∖ x) ∈ V) |
| 60 | 2, 59 | ax-mp 6 |
. . . . . . . . . . . . . 14
⊢ (A
∖ x) ∈ V |
| 61 | 60 | domen 3284 |
. . . . . . . . . . . . 13
⊢ (x
≼ (A ∖ x) ↔ ∃y(x ≈
y ∧ y ⊆ (A
∖ x))) |
| 62 | 58, 61 | syl5ib 181 |
. . . . . . . . . . . 12
⊢ (((ω ≼ x ∧ x
⊆ A) ∧ g:(x ×
x)–1-1-onto→x) →
(x ≼ (A ∖ x)
→ ∃h ∈ H g ⊂
h)) |
| 63 | | domtri 3644 |
. . . . . . . . . . . . 13
⊢ ((x
∈ V ∧ (A ∖ x) ∈ V) → (x ≼ (A
∖ x) ↔ ¬ (A ∖ x)
≺ x)) |
| 64 | 11, 60, 63 | mp2an 520 |
. . . . . . . . . . . 12
⊢ (x
≼ (A ∖ x) ↔ ¬ (A ∖ x)
≺ x) |
| 65 | | dfrex2 1212 |
. . . . . . . . . . . 12
⊢ (∃h ∈ H
g ⊂ h ↔ ¬ ∀h ∈ H ¬
g ⊂ h) |
| 66 | 62, 64, 65 | 3imtr3g 425 |
. . . . . . . . . . 11
⊢ (((ω ≼ x ∧ x
⊆ A) ∧ g:(x ×
x)–1-1-onto→x) →
(¬ (A ∖ x) ≺ x
→ ¬ ∀h ∈ H ¬ g ⊂
h)) |
| 67 | 66 | a3d 70 |
. . . . . . . . . 10
⊢ (((ω ≼ x ∧ x
⊆ A) ∧ g:(x ×
x)–1-1-onto→x) →
(∀h ∈ H ¬ g ⊂
h → (A ∖ x)
≺ x)) |
| 68 | | sbth 3359 |
. . . . . . . . . . . . . . . 16
⊢ ((A
≼ x ∧ x ≼ A)
→ A ≈ x) |
| 69 | | domentr 3326 |
. . . . . . . . . . . . . . . . 17
⊢ ((A
≼ (x × x) ∧ (x
× x) ≈ x) → A
≼ x) |
| 70 | 11, 60 | unxpdom2 3651 |
. . . . . . . . . . . . . . . . . . 19
⊢ ((1o ≺ x ∧ (A
∖ x) ≼ x) → (x
∪ (A ∖ x)) ≼ (x
× x)) |
| 71 | | ssun2 1622 |
. . . . . . . . . . . . . . . . . . . . . 22
⊢ A
⊆ (x ∪ A) |
| 72 | | ssdomg 3311 |
. . . . . . . . . . . . . . . . . . . . . 22
⊢ (A
∈ V → (A ⊆ (x ∪ A)
→ A ≼ (x ∪ A))) |
| 73 | 2, 71, 72 | mp2 43 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ A
≼ (x ∪ A) |
| 74 | | undif2 1762 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ (x
∪ (A ∖ x)) = (x ∪
A) |
| 75 | 73, 74 | breqtrr 2082 |
. . . . . . . . . . . . . . . . . . . 20
⊢ A
≼ (x ∪ (A ∖ x)) |
| 76 | | domtr 3320 |
. . . . . . . . . . . . . . . . . . . 20
⊢ ((A
≼ (x ∪ (A ∖ x))
∧ (x ∪ (A ∖ x))
≼ (x × x)) → A
≼ (x × x)) |
| 77 | 75, 76 | mpan 518 |
. . . . . . . . . . . . . . . . . . 19
⊢ ((x
∪ (A ∖ x)) ≼ (x
× x) → A ≼ (x
× x)) |
| 78 | 70, 77 | syl 12 |
. . . . . . . . . . . . . . . . . 18
⊢ ((1o ≺ x ∧ (A
∖ x) ≼ x) → A
≼ (x × x)) |
| 79 | | 1onn 3193 |
. . . . . . . . . . . . . . . . . . 19
⊢ 1o ∈
ω |
| 80 | 11 | infsdomnn 3426 |
. . . . . . . . . . . . . . . . . . 19
⊢ ((ω ≼ x ∧ 1o ∈ ω) →
1o ≺ x) |
| 81 | 79, 80 | mpan2 519 |
. . . . . . . . . . . . . . . . . 18
⊢ (ω ≼ x → 1o ≺ x) |
| 82 | | sdomdom 3290 |
. . . . . . . . . . . . . . . . . 18
⊢ ((A
∖ x) ≺ x → (A
∖ x) ≼ x) |
| 83 | 78, 81, 82 | syl2an 349 |
. . . . . . . . . . . . . . . . 17
⊢ ((ω ≼ x ∧ (A
∖ x) ≺ x) → A
≼ (x × x)) |
| 84 | 69, 83 | sylan 343 |
. . . . . . . . . . . . . . . 16
⊢ (((ω ≼ x ∧ (A
∖ x) ≺ x) ∧ (x
× x) ≈ x) → A
≼ x) |
| 85 | | ssdomg 3311 |
. . . . . . . . . . . . . . . . 17
⊢ (x
∈ V → (x ⊆ A → x
≼ A)) |
| 86 | 11, 85 | ax-mp 6 |
. . . . . . . . . . . . . . . 16
⊢ (x
⊆ A → x ≼ A) |
| 87 | 68, 84, 86 | syl2an 349 |
. . . . . . . . . . . . . . 15
⊢ ((((ω ≼ x ∧ (A
∖ x) ≺ x) ∧ (x
× x) ≈ x) ∧ x
⊆ A) → A ≈ x) |
| 88 | | entrt 3319 |
. . . . . . . . . . . . . . . . . . 19
⊢ (((A
× A) ≈ x ∧ x
≈ A) → (A × A)
≈ A) |
| 89 | | entrt 3319 |
. . . . . . . . . . . . . . . . . . . 20
⊢ (((A
× A) ≈ (x × x)
∧ (x × x) ≈ x)
→ (A × A) ≈ x) |
| 90 | 2, 11, 2, 11 | xpen 3383 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ ((A
≈ x ∧ A ≈ x)
→ (A × A) ≈ (x
× x)) |
| 91 | 90 | anidms 332 |
. . . . . . . . . . . . . . . . . . . 20
⊢ (A
≈ x → (A × A)
≈ (x × x)) |
| 92 | 89, 91 | sylan 343 |
. . . . . . . . . . . . . . . . . . 19
⊢ ((A
≈ x ∧ (x × x)
≈ x) → (A × A)
≈ x) |
| 93 | 11 | ensym 3317 |
. . . . . . . . . . . . . . . . . . . 20
⊢ (A
≈ x → x ≈ A) |
| 94 | 93 | adantr 306 |
. . . . . . . . . . . . . . . . . . 19
⊢ ((A
≈ x ∧ (x × x)
≈ x) → x ≈ A) |
| 95 | 88, 92, 94 | sylanc 361 |
. . . . . . . . . . . . . . . . . 18
⊢ ((A
≈ x ∧ (x × x)
≈ x) → (A × A)
≈ A) |
| 96 | 95 | ancoms 334 |
. . . . . . . . . . . . . . . . 17
⊢ (((x
× x) ≈ x ∧ A
≈ x) → (A × A)
≈ A) |
| 97 | 96 | exp 291 |
. . . . . . . . . . . . . . . 16
⊢ ((x
× x) ≈ x → (A
≈ x → (A × A)
≈ A)) |
| 98 | 97 | ad2antlr 321 |
. . . . . . . . . . . . . . 15
⊢ ((((ω ≼ x ∧ (A
∖ x) ≺ x) ∧ (x
× x) ≈ x) ∧ x
⊆ A) → (A ≈ x
→ (A × A) ≈ A)) |
| 99 | 87, 98 | mpd 46 |
. . . . . . . . . . . . . 14
⊢ ((((ω ≼ x ∧ (A
∖ x) ≺ x) ∧ (x
× x) ≈ x) ∧ x
⊆ A) → (A × A)
≈ A) |
| 100 | 99 | exp41 299 |
. . . . . . . . . . . . 13
⊢ (ω ≼ x → ((A
∖ x) ≺ x → ((x
× x) ≈ x → (x
⊆ A → (A × A)
≈ A)))) |
| 101 | 100 | com24 37 |
. . . . . . . . . . . 12
⊢ (ω ≼ x → (x
⊆ A → ((x × x)
≈ x → ((A ∖ x)
≺ x → (A × A)
≈ A)))) |
| 102 | 101 | imp31 280 |
. . . . . . . . . . 11
⊢ (((ω ≼ x ∧ x
⊆ A) ∧ (x × x)
≈ x) → ((A ∖ x)
≺ x → (A × A)
≈ A)) |
| 103 | 102, 48 | sylan2 346 |
. . . . . . . . . 10
⊢ (((ω ≼ x ∧ x
⊆ A) ∧ g:(x ×
x)–1-1-onto→x) →
((A ∖ x) ≺ x
→ (A × A) ≈ A)) |
| 104 | 67, 103 | syld 27 |
. . . . . . . . 9
⊢ (((ω ≼ x ∧ x
⊆ A) ∧ g:(x ×
x)–1-1-onto→x) →
(∀h ∈ H ¬ g ⊂
h → (A × A)
≈ A)) |
| 105 | 104 | 19.23aiv 952 |
. . . . . . . 8
⊢ (∃x((ω ≼ x ∧ x
⊆ A) ∧ g:(x ×
x)–1-1-onto→x) →
(∀h ∈ H ¬ g ⊂
h → (A × A)
≈ A)) |
| 106 | 105 | syl3 18 |
. . . . . . 7
⊢ ((¬ g = ∅ → ∃x((ω ≼ x ∧ x
⊆ A) ∧ g:(x ×
x)–1-1-onto→x)) →
(¬ g = ∅ → (∀h ∈ H ¬
g ⊂ h → (A
× A) ≈ A))) |
| 107 | 8, 106 | sylbi 174 |
. . . . . 6
⊢ (g
∈ H → (¬ g = ∅ → (∀h ∈ H ¬
g ⊂ h → (A
× A) ≈ A))) |
| 108 | 107 | com13 33 |
. . . . 5
⊢ (∀h ∈ H ¬
g ⊂ h → (¬ g = ∅ → (g ∈ H
→ (A × A) ≈ A))) |
| 109 | 4, 108 | syld 27 |
. . . 4
⊢ (∀h ∈ H ¬
g ⊂ h → (ω ≼ A → (g
∈ H → (A × A)
≈ A))) |
| 110 | 109 | com3r 35 |
. . 3
⊢ (g
∈ H → (∀h ∈ H ¬
g ⊂ h → (ω ≼ A → (A
× A) ≈ A))) |
| 111 | 110 | r19.23aiv 1284 |
. 2
⊢ (∃g ∈ H
∀h ∈ H ¬ g ⊂
h → (ω ≼ A → (A
× A) ≈ A)) |
| 112 | 3, 111 | ax-mp 6 |
1
⊢ (ω ≼ A → (A
× A) ≈ A) |