Proof of Theorem alephordi
| Step | Hyp | Ref
| Expression |
| 1 | | eleq2 1150 |
. . 3
⊢ (x =
∅ → (A ∈ x ↔ A
∈ ∅)) |
| 2 | | fveq2 2832 |
. . . 4
⊢ (x =
∅ → (ℵ ‘x) =
(ℵ ‘∅)) |
| 3 | 2 | breq2d 2072 |
. . 3
⊢ (x =
∅ → ((ℵ ‘A) ≺
(ℵ ‘x) ↔ (ℵ
‘A) ≺ (ℵ
‘∅))) |
| 4 | 1, 3 | imbi12d 474 |
. 2
⊢ (x =
∅ → ((A ∈ x → (ℵ ‘A) ≺ (ℵ ‘x)) ↔ (A
∈ ∅ → (ℵ ‘A)
≺ (ℵ ‘∅)))) |
| 5 | | eleq2 1150 |
. . 3
⊢ (x =
y → (A ∈ x
↔ A ∈ y)) |
| 6 | | fveq2 2832 |
. . . 4
⊢ (x =
y → (ℵ ‘x) = (ℵ ‘y)) |
| 7 | 6 | breq2d 2072 |
. . 3
⊢ (x =
y → ((ℵ ‘A) ≺ (ℵ ‘x) ↔ (ℵ ‘A) ≺ (ℵ ‘y))) |
| 8 | 5, 7 | imbi12d 474 |
. 2
⊢ (x =
y → ((A ∈ x
→ (ℵ ‘A) ≺ (ℵ
‘x)) ↔ (A ∈ y
→ (ℵ ‘A) ≺ (ℵ
‘y)))) |
| 9 | | eleq2 1150 |
. . 3
⊢ (x =
suc y → (A ∈ x
↔ A ∈ suc y)) |
| 10 | | fveq2 2832 |
. . . 4
⊢ (x =
suc y → (ℵ ‘x) = (ℵ ‘suc y)) |
| 11 | 10 | breq2d 2072 |
. . 3
⊢ (x =
suc y → ((ℵ ‘A) ≺ (ℵ ‘x) ↔ (ℵ ‘A) ≺ (ℵ ‘suc y))) |
| 12 | 9, 11 | imbi12d 474 |
. 2
⊢ (x =
suc y → ((A ∈ x
→ (ℵ ‘A) ≺ (ℵ
‘x)) ↔ (A ∈ suc y
→ (ℵ ‘A) ≺ (ℵ
‘suc y)))) |
| 13 | | eleq2 1150 |
. . 3
⊢ (x =
B → (A ∈ x
↔ A ∈ B)) |
| 14 | | fveq2 2832 |
. . . 4
⊢ (x =
B → (ℵ ‘x) = (ℵ ‘B)) |
| 15 | 14 | breq2d 2072 |
. . 3
⊢ (x =
B → ((ℵ ‘A) ≺ (ℵ ‘x) ↔ (ℵ ‘A) ≺ (ℵ ‘B))) |
| 16 | 13, 15 | imbi12d 474 |
. 2
⊢ (x =
B → ((A ∈ x
→ (ℵ ‘A) ≺ (ℵ
‘x)) ↔ (A ∈ B
→ (ℵ ‘A) ≺ (ℵ
‘B)))) |
| 17 | | noel 1711 |
. . 3
⊢ ¬ A ∈ ∅ |
| 18 | 17 | pm2.21i 73 |
. 2
⊢ (A
∈ ∅ → (ℵ ‘A)
≺ (ℵ ‘∅)) |
| 19 | | sdomtr 3373 |
. . . . . . . . . 10
⊢ (((ℵ ‘A) ≺ (ℵ ‘y) ∧ (ℵ ‘y) ≺ (ℵ ‘suc y)) → (ℵ ‘A) ≺ (ℵ ‘suc y)) |
| 20 | | alephordlem1 3677 |
. . . . . . . . . 10
⊢ (y
∈ On → (ℵ ‘y) ≺
(ℵ ‘suc y)) |
| 21 | 19, 20 | sylan2 346 |
. . . . . . . . 9
⊢ (((ℵ ‘A) ≺ (ℵ ‘y) ∧ y
∈ On) → (ℵ ‘A)
≺ (ℵ ‘suc y)) |
| 22 | 21 | exp 291 |
. . . . . . . 8
⊢ ((ℵ ‘A) ≺ (ℵ ‘y) → (y
∈ On → (ℵ ‘A) ≺
(ℵ ‘suc y))) |
| 23 | 22 | com12 13 |
. . . . . . 7
⊢ (y
∈ On → ((ℵ ‘A)
≺ (ℵ ‘y) → (ℵ
‘A) ≺ (ℵ ‘suc
y))) |
| 24 | 23 | syl3d 26 |
. . . . . 6
⊢ (y
∈ On → ((A ∈ y → (ℵ ‘A) ≺ (ℵ ‘y)) → (A
∈ y → (ℵ ‘A) ≺ (ℵ ‘suc y)))) |
| 25 | 24 | com23 32 |
. . . . 5
⊢ (y
∈ On → (A ∈ y → ((A
∈ y → (ℵ ‘A) ≺ (ℵ ‘y)) → (ℵ ‘A) ≺ (ℵ ‘suc y)))) |
| 26 | | fveq2 2832 |
. . . . . . . . 9
⊢ (A =
y → (ℵ ‘A) = (ℵ ‘y)) |
| 27 | 26 | breq1d 2071 |
. . . . . . . 8
⊢ (A =
y → ((ℵ ‘A) ≺ (ℵ ‘suc y) ↔ (ℵ ‘y) ≺ (ℵ ‘suc y))) |
| 28 | 27, 20 | syl5bir 184 |
. . . . . . 7
⊢ (A =
y → (y ∈ On → (ℵ ‘A) ≺ (ℵ ‘suc y))) |
| 29 | 28 | a1d 14 |
. . . . . 6
⊢ (A =
y → ((A ∈ y
→ (ℵ ‘A) ≺ (ℵ
‘y)) → (y ∈ On → (ℵ ‘A) ≺ (ℵ ‘suc y)))) |
| 30 | 29 | com3r 35 |
. . . . 5
⊢ (y
∈ On → (A = y → ((A
∈ y → (ℵ ‘A) ≺ (ℵ ‘y)) → (ℵ ‘A) ≺ (ℵ ‘suc y)))) |
| 31 | 25, 30 | jaod 329 |
. . . 4
⊢ (y
∈ On → ((A ∈ y ∨ A =
y) → ((A ∈ y
→ (ℵ ‘A) ≺ (ℵ
‘y)) → (ℵ ‘A) ≺ (ℵ ‘suc y)))) |
| 32 | | visset 1350 |
. . . . 5
⊢ y
∈ V |
| 33 | 32 | elsuc2 2293 |
. . . 4
⊢ (A
∈ suc y ↔ (A ∈ y ∨
A = y)) |
| 34 | 31, 33 | syl5ib 181 |
. . 3
⊢ (y
∈ On → (A ∈ suc y → ((A
∈ y → (ℵ ‘A) ≺ (ℵ ‘y)) → (ℵ ‘A) ≺ (ℵ ‘suc y)))) |
| 35 | 34 | com23 32 |
. 2
⊢ (y
∈ On → ((A ∈ y → (ℵ ‘A) ≺ (ℵ ‘y)) → (A
∈ suc y → (ℵ
‘A) ≺ (ℵ ‘suc
y)))) |
| 36 | | visset 1350 |
. . . . . . . . 9
⊢ x
∈ V |
| 37 | | alephlim 3670 |
. . . . . . . . 9
⊢ ((x
∈ V ∧ Lim x) →
(ℵ ‘x) = ∪y ∈ x (ℵ ‘y)) |
| 38 | 36, 37 | mpan 518 |
. . . . . . . 8
⊢ (Lim x
→ (ℵ ‘x) = ∪y ∈ x (ℵ ‘y)) |
| 39 | 38 | sseq2d 1528 |
. . . . . . 7
⊢ (Lim x
→ ((ℵ ‘A) ⊆ (ℵ
‘x) ↔ (ℵ ‘A) ⊆ ∪y ∈ x
(ℵ ‘y))) |
| 40 | | fveq2 2832 |
. . . . . . . 8
⊢ (y =
A → (ℵ ‘y) = (ℵ ‘A)) |
| 41 | 40 | ssiun2s 2020 |
. . . . . . 7
⊢ (A
∈ x → (ℵ ‘A) ⊆ ∪y ∈ x
(ℵ ‘y)) |
| 42 | 39, 41 | syl5bir 184 |
. . . . . 6
⊢ (Lim x
→ (A ∈ x → (ℵ ‘A) ⊆ (ℵ ‘x))) |
| 43 | | alephon 3671 |
. . . . . . 7
⊢ (ℵ ‘A) ∈ On |
| 44 | | ssdomg 3311 |
. . . . . . 7
⊢ ((ℵ ‘A) ∈ On → ((ℵ ‘A) ⊆ (ℵ ‘x) → (ℵ ‘A) ≼ (ℵ ‘x))) |
| 45 | 43, 44 | ax-mp 6 |
. . . . . 6
⊢ ((ℵ ‘A) ⊆ (ℵ ‘x) → (ℵ ‘A) ≼ (ℵ ‘x)) |
| 46 | 42, 45 | syl6 23 |
. . . . 5
⊢ (Lim x
→ (A ∈ x → (ℵ ‘A) ≼ (ℵ ‘x))) |
| 47 | | limsuc 2361 |
. . . . . . . . . 10
⊢ (Lim x
→ (A ∈ x ↔ suc A
∈ x)) |
| 48 | | alephordlem2 3678 |
. . . . . . . . . . 11
⊢ ((x
∈ V ∧ Lim x) → (suc
A ∈ x → (ℵ ‘suc A) ≼ (ℵ ‘x))) |
| 49 | 36, 48 | mpan 518 |
. . . . . . . . . 10
⊢ (Lim x
→ (suc A ∈ x → (ℵ ‘suc A) ≼ (ℵ ‘x))) |
| 50 | 47, 49 | sylbid 178 |
. . . . . . . . 9
⊢ (Lim x
→ (A ∈ x → (ℵ ‘suc A) ≼ (ℵ ‘x))) |
| 51 | 50 | imp 277 |
. . . . . . . 8
⊢ ((Lim x ∧ A ∈
x) → (ℵ ‘suc A) ≼ (ℵ ‘x)) |
| 52 | | domnsym 3365 |
. . . . . . . 8
⊢ ((ℵ ‘suc A) ≼ (ℵ ‘x) → ¬ (ℵ ‘x) ≺ (ℵ ‘suc A)) |
| 53 | 51, 52 | syl 12 |
. . . . . . 7
⊢ ((Lim x ∧ A ∈
x) → ¬ (ℵ ‘x) ≺ (ℵ ‘suc A)) |
| 54 | | onelon 2223 |
. . . . . . . . 9
⊢ ((x
∈ On ∧ A ∈ x) → A
∈ On) |
| 55 | | limelon 2286 |
. . . . . . . . . 10
⊢ ((x
∈ V ∧ Lim x) →
x ∈ On) |
| 56 | 36, 55 | mpan 518 |
. . . . . . . . 9
⊢ (Lim x
→ x ∈ On) |
| 57 | 54, 56 | sylan 343 |
. . . . . . . 8
⊢ ((Lim x ∧ A ∈
x) → A ∈ On) |
| 58 | | fvex 2838 |
. . . . . . . . . . . 12
⊢ (ℵ ‘x) ∈ V |
| 59 | 58 | ensym 3317 |
. . . . . . . . . . 11
⊢ ((ℵ ‘A) ≈ (ℵ ‘x) → (ℵ ‘x) ≈ (ℵ ‘A)) |
| 60 | | ensdomtr 3372 |
. . . . . . . . . . . 12
⊢ (((ℵ ‘x) ≈ (ℵ ‘A) ∧ (ℵ ‘A) ≺ (ℵ ‘suc A)) → (ℵ ‘x) ≺ (ℵ ‘suc A)) |
| 61 | 60 | exp 291 |
. . . . . . . . . . 11
⊢ ((ℵ ‘x) ≈ (ℵ ‘A) → ((ℵ ‘A) ≺ (ℵ ‘suc A) → (ℵ ‘x) ≺ (ℵ ‘suc A))) |
| 62 | 59, 61 | syl 12 |
. . . . . . . . . 10
⊢ ((ℵ ‘A) ≈ (ℵ ‘x) → ((ℵ ‘A) ≺ (ℵ ‘suc A) → (ℵ ‘x) ≺ (ℵ ‘suc A))) |
| 63 | | alephordlem1 3677 |
. . . . . . . . . 10
⊢ (A
∈ On → (ℵ ‘A) ≺
(ℵ ‘suc A)) |
| 64 | 62, 63 | syl5 22 |
. . . . . . . . 9
⊢ ((ℵ ‘A) ≈ (ℵ ‘x) → (A
∈ On → (ℵ ‘x) ≺
(ℵ ‘suc A))) |
| 65 | 64 | com12 13 |
. . . . . . . 8
⊢ (A
∈ On → ((ℵ ‘A)
≈ (ℵ ‘x) → (ℵ
‘x) ≺ (ℵ ‘suc
A))) |
| 66 | 57, 65 | syl 12 |
. . . . . . 7
⊢ ((Lim x ∧ A ∈
x) → ((ℵ ‘A) ≈ (ℵ ‘x) → (ℵ ‘x) ≺ (ℵ ‘suc A))) |
| 67 | 53, 66 | mtod 95 |
. . . . . 6
⊢ ((Lim x ∧ A ∈
x) → ¬ (ℵ ‘A) ≈ (ℵ ‘x)) |
| 68 | 67 | exp 291 |
. . . . 5
⊢ (Lim x
→ (A ∈ x → ¬ (ℵ ‘A) ≈ (ℵ ‘x))) |
| 69 | 46, 68 | jcad 455 |
. . . 4
⊢ (Lim x
→ (A ∈ x → ((ℵ ‘A) ≼ (ℵ ‘x) ∧ ¬ (ℵ ‘A) ≈ (ℵ ‘x)))) |
| 70 | | brsdom 3286 |
. . . 4
⊢ ((ℵ ‘A) ≺ (ℵ ‘x) ↔ ((ℵ ‘A) ≼ (ℵ ‘x) ∧ ¬ (ℵ ‘A) ≈ (ℵ ‘x))) |
| 71 | 69, 70 | syl6ibr 186 |
. . 3
⊢ (Lim x
→ (A ∈ x → (ℵ ‘A) ≺ (ℵ ‘x))) |
| 72 | 71 | a1d 14 |
. 2
⊢ (Lim x
→ (∀y ∈ x (A ∈
y → (ℵ ‘A) ≺ (ℵ ‘y)) → (A
∈ x → (ℵ ‘A) ≺ (ℵ ‘x)))) |
| 73 | 4, 8, 12, 16, 18, 35, 72 | tfinds 2401 |
1
⊢ (B
∈ On → (A ∈ B → (ℵ ‘A) ≺ (ℵ ‘B))) |