Proof of Theorem oaordi
| Step | Hyp | Ref
| Expression |
| 1 | | onelon 2223 |
. . . . 5
⊢ ((B
∈ On ∧ A ∈ B) → A
∈ On) |
| 2 | 1 | adantll 309 |
. . . 4
⊢ (((C
∈ On ∧ B ∈ On) ∧ A ∈ B)
→ A ∈ On) |
| 3 | | eloni 2209 |
. . . . . . . . . 10
⊢ (B
∈ On → Ord B) |
| 4 | | ordsucss 2320 |
. . . . . . . . . 10
⊢ (Ord B
→ (A ∈ B → suc A
⊆ B)) |
| 5 | 3, 4 | syl 12 |
. . . . . . . . 9
⊢ (B
∈ On → (A ∈ B → suc A
⊆ B)) |
| 6 | 5 | ad2antlr 321 |
. . . . . . . 8
⊢ (((C
∈ On ∧ B ∈ On) ∧ A ∈ On) → (A ∈ B
→ suc A ⊆ B)) |
| 7 | | opreq2 3007 |
. . . . . . . . . . . . . . 15
⊢ (x =
suc A → (C +o x) = (C
+o suc A)) |
| 8 | 7 | sseq2d 1528 |
. . . . . . . . . . . . . 14
⊢ (x =
suc A → ((C +o suc A) ⊆ (C
+o x) ↔ (C +o suc A) ⊆ (C
+o suc A))) |
| 9 | 8 | imbi2d 464 |
. . . . . . . . . . . . 13
⊢ (x =
suc A → ((C ∈ On → (C +o suc A) ⊆ (C
+o x)) ↔ (C ∈ On → (C +o suc A) ⊆ (C
+o suc A)))) |
| 10 | | opreq2 3007 |
. . . . . . . . . . . . . . 15
⊢ (x =
y → (C +o x) = (C
+o y)) |
| 11 | 10 | sseq2d 1528 |
. . . . . . . . . . . . . 14
⊢ (x =
y → ((C +o suc A) ⊆ (C
+o x) ↔ (C +o suc A) ⊆ (C
+o y))) |
| 12 | 11 | imbi2d 464 |
. . . . . . . . . . . . 13
⊢ (x =
y → ((C ∈ On → (C +o suc A) ⊆ (C
+o x)) ↔ (C ∈ On → (C +o suc A) ⊆ (C
+o y)))) |
| 13 | | opreq2 3007 |
. . . . . . . . . . . . . . 15
⊢ (x =
suc y → (C +o x) = (C
+o suc y)) |
| 14 | 13 | sseq2d 1528 |
. . . . . . . . . . . . . 14
⊢ (x =
suc y → ((C +o suc A) ⊆ (C
+o x) ↔ (C +o suc A) ⊆ (C
+o suc y))) |
| 15 | 14 | imbi2d 464 |
. . . . . . . . . . . . 13
⊢ (x =
suc y → ((C ∈ On → (C +o suc A) ⊆ (C
+o x)) ↔ (C ∈ On → (C +o suc A) ⊆ (C
+o suc y)))) |
| 16 | | opreq2 3007 |
. . . . . . . . . . . . . . 15
⊢ (x =
B → (C +o x) = (C
+o B)) |
| 17 | 16 | sseq2d 1528 |
. . . . . . . . . . . . . 14
⊢ (x =
B → ((C +o suc A) ⊆ (C
+o x) ↔ (C +o suc A) ⊆ (C
+o B))) |
| 18 | 17 | imbi2d 464 |
. . . . . . . . . . . . 13
⊢ (x =
B → ((C ∈ On → (C +o suc A) ⊆ (C
+o x)) ↔ (C ∈ On → (C +o suc A) ⊆ (C
+o B)))) |
| 19 | | ssid 1519 |
. . . . . . . . . . . . . . 15
⊢ (C
+o suc A) ⊆
(C +o suc A) |
| 20 | 19 | a1i 7 |
. . . . . . . . . . . . . 14
⊢ (C
∈ On → (C +o
suc A) ⊆ (C +o suc A)) |
| 21 | 20 | a1i 7 |
. . . . . . . . . . . . 13
⊢ (suc A
∈ On → (C ∈ On →
(C +o suc A) ⊆ (C
+o suc A))) |
| 22 | | oasuc 3131 |
. . . . . . . . . . . . . . . . . . 19
⊢ ((C
∈ On ∧ y ∈ On) →
(C +o suc y) = suc (C
+o y)) |
| 23 | 22 | ancoms 334 |
. . . . . . . . . . . . . . . . . 18
⊢ ((y
∈ On ∧ C ∈ On) →
(C +o suc y) = suc (C
+o y)) |
| 24 | 23 | sseq2d 1528 |
. . . . . . . . . . . . . . . . 17
⊢ ((y
∈ On ∧ C ∈ On) →
((C +o suc A) ⊆ (C
+o suc y) ↔
(C +o suc A) ⊆ suc (C +o y))) |
| 25 | | sssucid 2300 |
. . . . . . . . . . . . . . . . . 18
⊢ (C
+o y) ⊆ suc
(C +o y) |
| 26 | | sstr2 1510 |
. . . . . . . . . . . . . . . . . 18
⊢ ((C
+o suc A) ⊆
(C +o y) → ((C
+o y) ⊆ suc
(C +o y) → (C
+o suc A) ⊆ suc
(C +o y))) |
| 27 | 25, 26 | mpi 44 |
. . . . . . . . . . . . . . . . 17
⊢ ((C
+o suc A) ⊆
(C +o y) → (C
+o suc A) ⊆ suc
(C +o y)) |
| 28 | 24, 27 | syl5bir 184 |
. . . . . . . . . . . . . . . 16
⊢ ((y
∈ On ∧ C ∈ On) →
((C +o suc A) ⊆ (C
+o y) → (C +o suc A) ⊆ (C
+o suc y))) |
| 29 | 28 | exp 291 |
. . . . . . . . . . . . . . 15
⊢ (y
∈ On → (C ∈ On →
((C +o suc A) ⊆ (C
+o y) → (C +o suc A) ⊆ (C
+o suc y)))) |
| 30 | 29 | ad2antll 320 |
. . . . . . . . . . . . . 14
⊢ (((y
∈ On ∧ suc A ∈ On) ∧ suc
A ⊆ y) → (C
∈ On → ((C +o
suc A) ⊆ (C +o y) → (C
+o suc A) ⊆
(C +o suc y)))) |
| 31 | 30 | a2d 15 |
. . . . . . . . . . . . 13
⊢ (((y
∈ On ∧ suc A ∈ On) ∧ suc
A ⊆ y) → ((C
∈ On → (C +o
suc A) ⊆ (C +o y)) → (C
∈ On → (C +o
suc A) ⊆ (C +o suc y)))) |
| 32 | | sucelon 2319 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ (A
∈ On ↔ suc A ∈ On) |
| 33 | | sucssel 2321 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ (A
∈ On → (suc A ⊆ x → A
∈ x)) |
| 34 | 32, 33 | sylbir 176 |
. . . . . . . . . . . . . . . . . . . 20
⊢ (suc A
∈ On → (suc A ⊆ x → A
∈ x)) |
| 35 | | limsuc 2361 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ (Lim x
→ (A ∈ x ↔ suc A
∈ x)) |
| 36 | 35 | biimpd 135 |
. . . . . . . . . . . . . . . . . . . 20
⊢ (Lim x
→ (A ∈ x → suc A
∈ x)) |
| 37 | 34, 36 | sylan9r 360 |
. . . . . . . . . . . . . . . . . . 19
⊢ ((Lim x ∧ suc A
∈ On) → (suc A ⊆ x → suc A
∈ x)) |
| 38 | 37 | imp 277 |
. . . . . . . . . . . . . . . . . 18
⊢ (((Lim x ∧ suc A
∈ On) ∧ suc A ⊆ x) → suc A
∈ x) |
| 39 | | opreq2 3007 |
. . . . . . . . . . . . . . . . . . 19
⊢ (y =
suc A → (C +o y) = (C
+o suc A)) |
| 40 | 39 | ssiun2s 2020 |
. . . . . . . . . . . . . . . . . 18
⊢ (suc A
∈ x → (C +o suc A) ⊆ ∪y ∈ x
(C +o y)) |
| 41 | 38, 40 | syl 12 |
. . . . . . . . . . . . . . . . 17
⊢ (((Lim x ∧ suc A
∈ On) ∧ suc A ⊆ x) → (C
+o suc A) ⊆ ∪y ∈ x (C
+o y)) |
| 42 | 41 | adantr 306 |
. . . . . . . . . . . . . . . 16
⊢ ((((Lim x ∧ suc A
∈ On) ∧ suc A ⊆ x) ∧ C
∈ On) → (C +o
suc A) ⊆ ∪y ∈ x (C
+o y)) |
| 43 | | visset 1350 |
. . . . . . . . . . . . . . . . . . . 20
⊢ x
∈ V |
| 44 | | oalim 3135 |
. . . . . . . . . . . . . . . . . . . 20
⊢ ((C
∈ On ∧ (x ∈ V ∧
Lim x)) → (C +o x) = ∪y ∈ x
(C +o y)) |
| 45 | 43, 44 | mpan21 531 |
. . . . . . . . . . . . . . . . . . 19
⊢ ((C
∈ On ∧ Lim x) → (C +o x) = ∪y ∈ x
(C +o y)) |
| 46 | 45 | ancoms 334 |
. . . . . . . . . . . . . . . . . 18
⊢ ((Lim x ∧ C ∈
On) → (C +o x) = ∪y ∈ x
(C +o y)) |
| 47 | 46 | adantlr 310 |
. . . . . . . . . . . . . . . . 17
⊢ (((Lim x ∧ suc A
∈ On) ∧ C ∈ On) →
(C +o x) = ∪y ∈ x
(C +o y)) |
| 48 | 47 | adantlr 310 |
. . . . . . . . . . . . . . . 16
⊢ ((((Lim x ∧ suc A
∈ On) ∧ suc A ⊆ x) ∧ C
∈ On) → (C +o
x) = ∪y ∈ x
(C +o y)) |
| 49 | 42, 48 | sseqtr4d 1537 |
. . . . . . . . . . . . . . 15
⊢ ((((Lim x ∧ suc A
∈ On) ∧ suc A ⊆ x) ∧ C
∈ On) → (C +o
suc A) ⊆ (C +o x)) |
| 50 | 49 | exp 291 |
. . . . . . . . . . . . . 14
⊢ (((Lim x ∧ suc A
∈ On) ∧ suc A ⊆ x) → (C
∈ On → (C +o
suc A) ⊆ (C +o x))) |
| 51 | 50 | a1d 14 |
. . . . . . . . . . . . 13
⊢ (((Lim x ∧ suc A
∈ On) ∧ suc A ⊆ x) → (∀y ∈ x (suc
A ⊆ y → (C
∈ On → (C +o
suc A) ⊆ (C +o y))) → (C
∈ On → (C +o
suc A) ⊆ (C +o x)))) |
| 52 | 9, 12, 15, 18, 21, 31, 51 | tfindsg 2402 |
. . . . . . . . . . . 12
⊢ (((B
∈ On ∧ suc A ∈ On) ∧ suc
A ⊆ B) → (C
∈ On → (C +o
suc A) ⊆ (C +o B))) |
| 53 | 52 | exp31 293 |
. . . . . . . . . . 11
⊢ (B
∈ On → (suc A ∈ On →
(suc A ⊆ B → (C
∈ On → (C +o
suc A) ⊆ (C +o B))))) |
| 54 | 53, 32 | syl5ib 181 |
. . . . . . . . . 10
⊢ (B
∈ On → (A ∈ On → (suc
A ⊆ B → (C
∈ On → (C +o
suc A) ⊆ (C +o B))))) |
| 55 | 54 | com4r 41 |
. . . . . . . . 9
⊢ (C
∈ On → (B ∈ On →
(A ∈ On → (suc A ⊆ B
→ (C +o suc A) ⊆ (C
+o B))))) |
| 56 | 55 | imp31 280 |
. . . . . . . 8
⊢ (((C
∈ On ∧ B ∈ On) ∧ A ∈ On) → (suc A ⊆ B
→ (C +o suc A) ⊆ (C
+o B))) |
| 57 | 6, 56 | syld 27 |
. . . . . . 7
⊢ (((C
∈ On ∧ B ∈ On) ∧ A ∈ On) → (A ∈ B
→ (C +o suc A) ⊆ (C
+o B))) |
| 58 | | oasuc 3131 |
. . . . . . . . . 10
⊢ ((C
∈ On ∧ A ∈ On) →
(C +o suc A) = suc (C
+o A)) |
| 59 | 58 | sseq1d 1527 |
. . . . . . . . 9
⊢ ((C
∈ On ∧ A ∈ On) →
((C +o suc A) ⊆ (C
+o B) ↔ suc
(C +o A) ⊆ (C
+o B))) |
| 60 | | oprex 3018 |
. . . . . . . . . 10
⊢ (C
+o A) ∈
V |
| 61 | | sucssel 2321 |
. . . . . . . . . 10
⊢ ((C
+o A) ∈ V
→ (suc (C +o
A) ⊆ (C +o B) → (C
+o A) ∈ (C +o B))) |
| 62 | 60, 61 | ax-mp 6 |
. . . . . . . . 9
⊢ (suc (C +o A) ⊆ (C
+o B) → (C +o A) ∈ (C
+o B)) |
| 63 | 59, 62 | syl6bi 187 |
. . . . . . . 8
⊢ ((C
∈ On ∧ A ∈ On) →
((C +o suc A) ⊆ (C
+o B) → (C +o A) ∈ (C
+o B))) |
| 64 | 63 | adantlr 310 |
. . . . . . 7
⊢ (((C
∈ On ∧ B ∈ On) ∧ A ∈ On) → ((C +o suc A) ⊆ (C
+o B) → (C +o A) ∈ (C
+o B))) |
| 65 | 57, 64 | syld 27 |
. . . . . 6
⊢ (((C
∈ On ∧ B ∈ On) ∧ A ∈ On) → (A ∈ B
→ (C +o A) ∈ (C
+o B))) |
| 66 | 65 | imp 277 |
. . . . 5
⊢ ((((C
∈ On ∧ B ∈ On) ∧ A ∈ On) ∧ A ∈ B)
→ (C +o A) ∈ (C
+o B)) |
| 67 | 66 | an1rs 373 |
. . . 4
⊢ ((((C
∈ On ∧ B ∈ On) ∧ A ∈ B)
∧ A ∈ On) → (C +o A) ∈ (C
+o B)) |
| 68 | 2, 67 | mpdan 527 |
. . 3
⊢ (((C
∈ On ∧ B ∈ On) ∧ A ∈ B)
→ (C +o A) ∈ (C
+o B)) |
| 69 | 68 | exp 291 |
. 2
⊢ ((C
∈ On ∧ B ∈ On) →
(A ∈ B → (C
+o A) ∈ (C +o B))) |
| 70 | 69 | ancoms 334 |
1
⊢ ((B
∈ On ∧ C ∈ On) →
(A ∈ B → (C
+o A) ∈ (C +o B))) |