Proof of Theorem oaass
| Step | Hyp | Ref
| Expression |
| 1 | | opreq2 3007 |
. . . . . 6
⊢ (x =
∅ → ((A +o
B) +o x) = ((A
+o B)
+o ∅)) |
| 2 | | opreq2 3007 |
. . . . . . 7
⊢ (x =
∅ → (B +o
x) = (B
+o ∅)) |
| 3 | 2 | opreq2d 3013 |
. . . . . 6
⊢ (x =
∅ → (A +o
(B +o x)) = (A
+o (B
+o ∅))) |
| 4 | 1, 3 | cleq12d 1115 |
. . . . 5
⊢ (x =
∅ → (((A +o
B) +o x) = (A
+o (B
+o x)) ↔ ((A +o B) +o ∅) = (A +o (B +o ∅)))) |
| 5 | | opreq2 3007 |
. . . . . 6
⊢ (x =
y → ((A +o B) +o x) = ((A
+o B)
+o y)) |
| 6 | | opreq2 3007 |
. . . . . . 7
⊢ (x =
y → (B +o x) = (B
+o y)) |
| 7 | 6 | opreq2d 3013 |
. . . . . 6
⊢ (x =
y → (A +o (B +o x)) = (A
+o (B
+o y))) |
| 8 | 5, 7 | cleq12d 1115 |
. . . . 5
⊢ (x =
y → (((A +o B) +o x) = (A
+o (B
+o x)) ↔ ((A +o B) +o y) = (A
+o (B
+o y)))) |
| 9 | | opreq2 3007 |
. . . . . 6
⊢ (x =
suc y → ((A +o B) +o x) = ((A
+o B)
+o suc y)) |
| 10 | | opreq2 3007 |
. . . . . . 7
⊢ (x =
suc y → (B +o x) = (B
+o suc y)) |
| 11 | 10 | opreq2d 3013 |
. . . . . 6
⊢ (x =
suc y → (A +o (B +o x)) = (A
+o (B
+o suc y))) |
| 12 | 9, 11 | cleq12d 1115 |
. . . . 5
⊢ (x =
suc y → (((A +o B) +o x) = (A
+o (B
+o x)) ↔ ((A +o B) +o suc y) = (A
+o (B
+o suc y)))) |
| 13 | | opreq2 3007 |
. . . . . 6
⊢ (x =
C → ((A +o B) +o x) = ((A
+o B)
+o C)) |
| 14 | | opreq2 3007 |
. . . . . . 7
⊢ (x =
C → (B +o x) = (B
+o C)) |
| 15 | 14 | opreq2d 3013 |
. . . . . 6
⊢ (x =
C → (A +o (B +o x)) = (A
+o (B
+o C))) |
| 16 | 13, 15 | cleq12d 1115 |
. . . . 5
⊢ (x =
C → (((A +o B) +o x) = (A
+o (B
+o x)) ↔ ((A +o B) +o C) = (A
+o (B
+o C)))) |
| 17 | | oacl 3138 |
. . . . . . 7
⊢ ((A
∈ On ∧ B ∈ On) →
(A +o B) ∈ On) |
| 18 | | oa0 3124 |
. . . . . . 7
⊢ ((A
+o B) ∈ On →
((A +o B) +o ∅) = (A +o B)) |
| 19 | 17, 18 | syl 12 |
. . . . . 6
⊢ ((A
∈ On ∧ B ∈ On) →
((A +o B) +o ∅) = (A +o B)) |
| 20 | | oa0 3124 |
. . . . . . . 8
⊢ (B
∈ On → (B +o
∅) = B) |
| 21 | 20 | opreq2d 3013 |
. . . . . . 7
⊢ (B
∈ On → (A +o
(B +o ∅)) =
(A +o B)) |
| 22 | 21 | adantl 305 |
. . . . . 6
⊢ ((A
∈ On ∧ B ∈ On) →
(A +o (B +o ∅)) = (A +o B)) |
| 23 | 19, 22 | eqtr4d 1131 |
. . . . 5
⊢ ((A
∈ On ∧ B ∈ On) →
((A +o B) +o ∅) = (A +o (B +o ∅))) |
| 24 | | oasuc 3131 |
. . . . . . . . . 10
⊢ (((A
+o B) ∈ On ∧
y ∈ On) → ((A +o B) +o suc y) = suc ((A
+o B)
+o y)) |
| 25 | 24, 17 | sylan 343 |
. . . . . . . . 9
⊢ (((A
∈ On ∧ B ∈ On) ∧ y ∈ On) → ((A +o B) +o suc y) = suc ((A
+o B)
+o y)) |
| 26 | | oasuc 3131 |
. . . . . . . . . . . . 13
⊢ ((B
∈ On ∧ y ∈ On) →
(B +o suc y) = suc (B
+o y)) |
| 27 | 26 | opreq2d 3013 |
. . . . . . . . . . . 12
⊢ ((B
∈ On ∧ y ∈ On) →
(A +o (B +o suc y)) = (A
+o suc (B
+o y))) |
| 28 | 27 | adantl 305 |
. . . . . . . . . . 11
⊢ ((A
∈ On ∧ (B ∈ On ∧ y ∈ On)) → (A +o (B +o suc y)) = (A
+o suc (B
+o y))) |
| 29 | | oasuc 3131 |
. . . . . . . . . . . 12
⊢ ((A
∈ On ∧ (B +o
y) ∈ On) → (A +o suc (B +o y)) = suc (A
+o (B
+o y))) |
| 30 | | oacl 3138 |
. . . . . . . . . . . 12
⊢ ((B
∈ On ∧ y ∈ On) →
(B +o y) ∈ On) |
| 31 | 29, 30 | sylan2 346 |
. . . . . . . . . . 11
⊢ ((A
∈ On ∧ (B ∈ On ∧ y ∈ On)) → (A +o suc (B +o y)) = suc (A
+o (B
+o y))) |
| 32 | 28, 31 | eqtrd 1128 |
. . . . . . . . . 10
⊢ ((A
∈ On ∧ (B ∈ On ∧ y ∈ On)) → (A +o (B +o suc y)) = suc (A
+o (B
+o y))) |
| 33 | 32 | anassrs 338 |
. . . . . . . . 9
⊢ (((A
∈ On ∧ B ∈ On) ∧ y ∈ On) → (A +o (B +o suc y)) = suc (A
+o (B
+o y))) |
| 34 | 25, 33 | cleq12d 1115 |
. . . . . . . 8
⊢ (((A
∈ On ∧ B ∈ On) ∧ y ∈ On) → (((A +o B) +o suc y) = (A
+o (B
+o suc y)) ↔ suc
((A +o B) +o y) = suc (A
+o (B
+o y)))) |
| 35 | | suceq 2288 |
. . . . . . . 8
⊢ (((A
+o B)
+o y) = (A +o (B +o y)) → suc ((A +o B) +o y) = suc (A
+o (B
+o y))) |
| 36 | 34, 35 | syl5bir 184 |
. . . . . . 7
⊢ (((A
∈ On ∧ B ∈ On) ∧ y ∈ On) → (((A +o B) +o y) = (A
+o (B
+o y)) → ((A +o B) +o suc y) = (A
+o (B
+o suc y)))) |
| 37 | 36 | exp 291 |
. . . . . 6
⊢ ((A
∈ On ∧ B ∈ On) →
(y ∈ On → (((A +o B) +o y) = (A
+o (B
+o y)) → ((A +o B) +o suc y) = (A
+o (B
+o suc y))))) |
| 38 | 37 | com12 13 |
. . . . 5
⊢ (y
∈ On → ((A ∈ On ∧
B ∈ On) → (((A +o B) +o y) = (A
+o (B
+o y)) → ((A +o B) +o suc y) = (A
+o (B
+o suc y))))) |
| 39 | | iuneq2 2006 |
. . . . . . . 8
⊢ (∀y ∈ x
((A +o B) +o y) = (A
+o (B
+o y)) → ∪y ∈ x ((A
+o B)
+o y) = ∪y ∈ x (A
+o (B
+o y))) |
| 40 | 39 | adantl 305 |
. . . . . . 7
⊢ (((Lim x ∧ (A
∈ On ∧ B ∈ On)) ∧
∀y ∈ x ((A
+o B)
+o y) = (A +o (B +o y))) → ∪y ∈ x
((A +o B) +o y) = ∪y ∈ x
(A +o (B +o y))) |
| 41 | | visset 1350 |
. . . . . . . . . . 11
⊢ x
∈ V |
| 42 | | oalim 3135 |
. . . . . . . . . . 11
⊢ (((A
+o B) ∈ On ∧
(x ∈ V ∧ Lim x)) → ((A
+o B)
+o x) = ∪y ∈ x ((A
+o B)
+o y)) |
| 43 | 41, 42 | mpan21 531 |
. . . . . . . . . 10
⊢ (((A
+o B) ∈ On ∧ Lim
x) → ((A +o B) +o x) = ∪y ∈ x
((A +o B) +o y)) |
| 44 | 43, 17 | sylan 343 |
. . . . . . . . 9
⊢ (((A
∈ On ∧ B ∈ On) ∧ Lim
x) → ((A +o B) +o x) = ∪y ∈ x
((A +o B) +o y)) |
| 45 | 44 | ancoms 334 |
. . . . . . . 8
⊢ ((Lim x ∧ (A
∈ On ∧ B ∈ On)) →
((A +o B) +o x) = ∪y ∈ x
((A +o B) +o y)) |
| 46 | 45 | adantr 306 |
. . . . . . 7
⊢ (((Lim x ∧ (A
∈ On ∧ B ∈ On)) ∧
∀y ∈ x ((A
+o B)
+o y) = (A +o (B +o y))) → ((A
+o B)
+o x) = ∪y ∈ x ((A
+o B)
+o y)) |
| 47 | | oprex 3018 |
. . . . . . . . . . . 12
⊢ (B
+o x) ∈
V |
| 48 | | oalim 3135 |
. . . . . . . . . . . 12
⊢ ((A
∈ On ∧ ((B +o
x) ∈ V ∧ Lim (B +o x))) → (A
+o (B
+o x)) = ∪z ∈ (B +o x)(A
+o z)) |
| 49 | 47, 48 | mpan21 531 |
. . . . . . . . . . 11
⊢ ((A
∈ On ∧ Lim (B +o
x)) → (A +o (B +o x)) = ∪z ∈ (B
+o x)(A +o z)) |
| 50 | | oalimcl 3162 |
. . . . . . . . . . . . 13
⊢ ((B
∈ On ∧ (x ∈ V ∧
Lim x)) → Lim (B +o x)) |
| 51 | 41, 50 | mpan21 531 |
. . . . . . . . . . . 12
⊢ ((B
∈ On ∧ Lim x) → Lim (B +o x)) |
| 52 | 51 | ancoms 334 |
. . . . . . . . . . 11
⊢ ((Lim x ∧ B ∈
On) → Lim (B +o
x)) |
| 53 | 49, 52 | sylan2 346 |
. . . . . . . . . 10
⊢ ((A
∈ On ∧ (Lim x ∧ B ∈ On)) → (A +o (B +o x)) = ∪z ∈ (B
+o x)(A +o z)) |
| 54 | | limelon 2286 |
. . . . . . . . . . . . . . . . . 18
⊢ ((x
∈ V ∧ Lim x) →
x ∈ On) |
| 55 | 41, 54 | mpan 518 |
. . . . . . . . . . . . . . . . 17
⊢ (Lim x
→ x ∈ On) |
| 56 | | oacl 3138 |
. . . . . . . . . . . . . . . . . . . . . . 23
⊢ ((B
∈ On ∧ x ∈ On) →
(B +o x) ∈ On) |
| 57 | 56 | ancoms 334 |
. . . . . . . . . . . . . . . . . . . . . 22
⊢ ((x
∈ On ∧ B ∈ On) →
(B +o x) ∈ On) |
| 58 | | onelon 2223 |
. . . . . . . . . . . . . . . . . . . . . . 23
⊢ (((B
+o x) ∈ On ∧
z ∈ (B +o x)) → z
∈ On) |
| 59 | 58 | exp 291 |
. . . . . . . . . . . . . . . . . . . . . 22
⊢ ((B
+o x) ∈ On →
(z ∈ (B +o x) → z
∈ On)) |
| 60 | 57, 59 | syl 12 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ ((x
∈ On ∧ B ∈ On) →
(z ∈ (B +o x) → z
∈ On)) |
| 61 | 60 | adantld 307 |
. . . . . . . . . . . . . . . . . . . 20
⊢ ((x
∈ On ∧ B ∈ On) →
((A ∈ On ∧ z ∈ (B
+o x)) → z ∈ On)) |
| 62 | 61 | adantl 305 |
. . . . . . . . . . . . . . . . . . 19
⊢ ((Lim x ∧ (x
∈ On ∧ B ∈ On)) →
((A ∈ On ∧ z ∈ (B
+o x)) → z ∈ On)) |
| 63 | | ordtri2or 2328 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
31
⊢ ((Ord z ∧ Ord B)
→ (z ∈ B ∨ B ⊆
z)) |
| 64 | 63 | ancoms 334 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
30
⊢ ((Ord B ∧ Ord z)
→ (z ∈ B ∨ B ⊆
z)) |
| 65 | | eloni 2209 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
30
⊢ (B
∈ On → Ord B) |
| 66 | | eloni 2209 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
30
⊢ (z
∈ On → Ord z) |
| 67 | 64, 65, 66 | syl2an 349 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
⊢ ((B
∈ On ∧ z ∈ On) →
(z ∈ B ∨ B ⊆
z)) |
| 68 | 67 | adantrl 311 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . 28
⊢ ((B
∈ On ∧ (z ∈ (B +o x) ∧ z
∈ On)) → (z ∈ B ∨ B ⊆
z)) |
| 69 | 68 | adantll 309 |
. . . . . . . . . . . . . . . . . . . . . . . . . . 27
⊢ (((x
∈ On ∧ B ∈ On) ∧
(z ∈ (B +o x) ∧ z
∈ On)) → (z ∈ B ∨ B ⊆
z)) |
| 70 | 69 | adantl 305 |
. . . . . . . . . . . . . . . . . . . . . . . . . 26
⊢ ((Lim x ∧ ((x
∈ On ∧ B ∈ On) ∧
(z ∈ (B +o x) ∧ z
∈ On))) → (z ∈ B ∨ B ⊆
z)) |
| 71 | | opreq2 3007 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
34
⊢ (y =
∅ → (B +o
y) = (B
+o ∅)) |
| 72 | 71 | sseq2d 1528 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
33
⊢ (y =
∅ → (z ⊆ (B +o y) ↔ z
⊆ (B +o
∅))) |
| 73 | 72 | rcla4ev 1403 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
32
⊢ ((∅ ∈ x ∧ z
⊆ (B +o ∅))
→ ∃y ∈ x z ⊆
(B +o y)) |
| 74 | | 0ellim 2285 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
32
⊢ (Lim x
→ ∅ ∈ x) |
| 75 | | onelsst 2255 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
34
⊢ (B
∈ On → (z ∈ B → z
⊆ B)) |
| 76 | 20 | sseq2d 1528 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
34
⊢ (B
∈ On → (z ⊆ (B +o ∅) ↔ z ⊆ B)) |
| 77 | 75, 76 | sylibrd 179 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
33
⊢ (B
∈ On → (z ∈ B → z
⊆ (B +o
∅))) |
| 78 | 77 | imp 277 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
32
⊢ ((B
∈ On ∧ z ∈ B) → z
⊆ (B +o
∅)) |
| 79 | 73, 74, 78 | syl2an 349 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
31
⊢ ((Lim x ∧ (B
∈ On ∧ z ∈ B)) → ∃y ∈ x
z ⊆ (B +o y)) |
| 80 | 79 | exp32 294 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
30
⊢ (Lim x
→ (B ∈ On → (z ∈ B
→ ∃y ∈ x z ⊆
(B +o y)))) |
| 81 | 80 | imp 277 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
⊢ ((Lim x ∧ B ∈
On) → (z ∈ B → ∃y ∈ x
z ⊆ (B +o y))) |
| 82 | 81 | adantrl 311 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . 28
⊢ ((Lim x ∧ (x
∈ On ∧ B ∈ On)) →
(z ∈ B → ∃y ∈ x
z ⊆ (B +o y))) |
| 83 | 82 | adantrr 312 |
. . . . . . . . . . . . . . . . . . . . . . . . . . 27
⊢ ((Lim x ∧ ((x
∈ On ∧ B ∈ On) ∧
(z ∈ (B +o x) ∧ z
∈ On))) → (z ∈ B → ∃y ∈ x
z ⊆ (B +o y))) |
| 84 | | oawordex 3159 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
31
⊢ ((B
∈ On ∧ z ∈ On) →
(B ⊆ z ↔ ∃y ∈ On (B
+o y) = z)) |
| 85 | 84 | adantrl 311 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
30
⊢ ((B
∈ On ∧ (z ∈ (B +o x) ∧ z
∈ On)) → (B ⊆ z ↔ ∃y ∈ On (B
+o y) = z)) |
| 86 | 85 | adantll 309 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
⊢ (((x
∈ On ∧ B ∈ On) ∧
(z ∈ (B +o x) ∧ z
∈ On)) → (B ⊆ z ↔ ∃y ∈ On (B
+o y) = z)) |
| 87 | | oaord 3149 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . 39
⊢ ((y
∈ On ∧ x ∈ On ∧ B ∈ On) → (y ∈ x
↔ (B +o y) ∈ (B
+o x))) |
| 88 | 87 | 3expb 613 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . 38
⊢ ((y
∈ On ∧ (x ∈ On ∧ B ∈ On)) → (y ∈ x
↔ (B +o y) ∈ (B
+o x))) |
| 89 | | eleq1 1149 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . 38
⊢ ((B
+o y) = z → ((B
+o y) ∈ (B +o x) ↔ z
∈ (B +o x))) |
| 90 | 88, 89 | sylan9bb 418 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 37
⊢ (((y
∈ On ∧ (x ∈ On ∧ B ∈ On)) ∧ (B +o y) = z) →
(y ∈ x ↔ z
∈ (B +o x))) |
| 91 | 90 | an1rs 373 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . 36
⊢ (((y
∈ On ∧ (B +o
y) = z)
∧ (x ∈ On ∧ B ∈ On)) → (y ∈ x
↔ z ∈ (B +o x))) |
| 92 | 91 | biimpar 325 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. 35
⊢ ((((y
∈ On ∧ (B +o
y) = z)
∧ (x ∈ On ∧ B ∈ On)) ∧ z ∈ (B
+o x)) → y ∈ x) |
| 93 | | eqimss2 1549 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . 37
⊢ ((B
+o y) = z → z
⊆ (B +o y)) |
| 94 | 93 | adantl 305 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . 36
⊢ ((y
∈ On ∧ (B +o
y) = z)
→ z ⊆ (B +o y)) |
| 95 | 94 | ad2antll 320 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. 35
⊢ ((((y
∈ On ∧ (B +o
y) = z)
∧ (x ∈ On ∧ B ∈ On)) ∧ z ∈ (B
+o x)) → z ⊆ (B
+o y)) |
| 96 | 92, 95 | jca 236 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
34
⊢ ((((y
∈ On ∧ (B +o
y) = z)
∧ (x ∈ On ∧ B ∈ On)) ∧ z ∈ (B
+o x)) → (y ∈ x ∧
z ⊆ (B +o y))) |
| 97 | 96 | anasss 337 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
33
⊢ (((y
∈ On ∧ (B +o
y) = z)
∧ ((x ∈ On ∧ B ∈ On) ∧ z ∈ (B
+o x))) → (y ∈ x ∧
z ⊆ (B +o y))) |
| 98 | 97 | ancoms 334 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
32
⊢ ((((x
∈ On ∧ B ∈ On) ∧ z ∈ (B
+o x)) ∧ (y ∈ On ∧ (B +o y) = z)) →
(y ∈ x ∧ z
⊆ (B +o y))) |
| 99 | 98 | exp 291 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
31
⊢ (((x
∈ On ∧ B ∈ On) ∧ z ∈ (B
+o x)) → ((y ∈ On ∧ (B +o y) = z) →
(y ∈ x ∧ z
⊆ (B +o y)))) |
| 100 | 99 | r19.22dv2 1277 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
30
⊢ (((x
∈ On ∧ B ∈ On) ∧ z ∈ (B
+o x)) →
(∃y ∈ On (B +o y) = z →
∃y ∈ x z ⊆
(B +o y))) |
| 101 | 100 | adantrr 312 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
⊢ (((x
∈ On ∧ B ∈ On) ∧
(z ∈ (B +o x) ∧ z
∈ On)) → (∃y ∈ On
(B +o y) = z →
∃y ∈ x z ⊆
(B +o y))) |
| 102 | 86, 101 | sylbid 178 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . 28
⊢ (((x
∈ On ∧ B ∈ On) ∧
(z ∈ (B +o x) ∧ z
∈ On)) → (B ⊆ z → ∃y ∈ x
z ⊆ (B +o y))) |
| 103 | 102 | adantl 305 |
. . . . . . . . . . . . . . . . . . . . . . . . . . 27
⊢ ((Lim x ∧ ((x
∈ On ∧ B ∈ On) ∧
(z ∈ (B +o x) ∧ z
∈ On))) → (B ⊆ z → ∃y ∈ x
z ⊆ (B +o y))) |
| 104 | 83, 103 | jaod 329 |
. . . . . . . . . . . . . . . . . . . . . . . . . 26
⊢ ((Lim x ∧ ((x
∈ On ∧ B ∈ On) ∧
(z ∈ (B +o x) ∧ z
∈ On))) → ((z ∈ B ∨ B ⊆
z) → ∃y ∈ x
z ⊆ (B +o y))) |
| 105 | 70, 104 | mpd 46 |
. . . . . . . . . . . . . . . . . . . . . . . . 25
⊢ ((Lim x ∧ ((x
∈ On ∧ B ∈ On) ∧
(z ∈ (B +o x) ∧ z
∈ On))) → ∃y ∈
x z
⊆ (B +o y)) |
| 106 | 105 | exp45 303 |
. . . . . . . . . . . . . . . . . . . . . . . 24
⊢ (Lim x
→ ((x ∈ On ∧ B ∈ On) → (z ∈ (B
+o x) → (z ∈ On → ∃y ∈ x
z ⊆ (B +o y))))) |
| 107 | 106 | imp 277 |
. . . . . . . . . . . . . . . . . . . . . . 23
⊢ ((Lim x ∧ (x
∈ On ∧ B ∈ On)) →
(z ∈ (B +o x) → (z
∈ On → ∃y ∈ x z ⊆
(B +o y)))) |
| 108 | 107 | adantld 307 |
. . . . . . . . . . . . . . . . . . . . . 22
⊢ ((Lim x ∧ (x
∈ On ∧ B ∈ On)) →
((A ∈ On ∧ z ∈ (B
+o x)) → (z ∈ On → ∃y ∈ x
z ⊆ (B +o y)))) |
| 109 | 108 | imp32 281 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ (((Lim x ∧ (x
∈ On ∧ B ∈ On)) ∧
((A ∈ On ∧ z ∈ (B
+o x)) ∧ z ∈ On)) → ∃y ∈ x
z ⊆ (B +o y)) |
| 110 | | oaword 3151 |
. . . . . . . . . . . . . . . . . . . . . . 23
⊢ ((z
∈ On ∧ (B +o
y) ∈ On ∧ A ∈ On) → (z ⊆ (B
+o y) ↔ (A +o z) ⊆ (A
+o (B
+o y)))) |
| 111 | | pm3.27 260 |
. . . . . . . . . . . . . . . . . . . . . . . 24
⊢ (((A
∈ On ∧ z ∈ (B +o x)) ∧ z
∈ On) → z ∈ On) |
| 112 | 111 | ad2antlr 321 |
. . . . . . . . . . . . . . . . . . . . . . 23
⊢ ((((Lim x ∧ (x
∈ On ∧ B ∈ On)) ∧
((A ∈ On ∧ z ∈ (B
+o x)) ∧ z ∈ On)) ∧ y ∈ x)
→ z ∈ On) |
| 113 | | onelon 2223 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
⊢ ((x
∈ On ∧ y ∈ x) → y
∈ On) |
| 114 | 30, 113 | sylan2 346 |
. . . . . . . . . . . . . . . . . . . . . . . . . . . 28
⊢ ((B
∈ On ∧ (x ∈ On ∧ y ∈ x))
→ (B +o y) ∈ On) |
| 115 | 114 | exp32 294 |
. . . . . . . . . . . . . . . . . . . . . . . . . . 27
⊢ (B
∈ On → (x ∈ On →
(y ∈ x → (B
+o y) ∈
On))) |
| 116 | 115 | com12 13 |
. . . . . . . . . . . . . . . . . . . . . . . . . 26
⊢ (x
∈ On → (B ∈ On →
(y ∈ x → (B
+o y) ∈
On))) |
| 117 | 116 | imp31 280 |
. . . . . . . . . . . . . . . . . . . . . . . . 25
⊢ (((x
∈ On ∧ B ∈ On) ∧ y ∈ x)
→ (B +o y) ∈ On) |
| 118 | 117 | adantll 309 |
. . . . . . . . . . . . . . . . . . . . . . . 24
⊢ (((Lim x ∧ (x
∈ On ∧ B ∈ On)) ∧
y ∈ x) → (B
+o y) ∈
On) |
| 119 | 118 | adantlr 310 |
. . . . . . . . . . . . . . . . . . . . . . 23
⊢ ((((Lim x ∧ (x
∈ On ∧ B ∈ On)) ∧
((A ∈ On ∧ z ∈ (B
+o x)) ∧ z ∈ On)) ∧ y ∈ x)
→ (B +o y) ∈ On) |
| 120 | | pm3.26 256 |
. . . . . . . . . . . . . . . . . . . . . . . . 25
⊢ ((A
∈ On ∧ z ∈ (B +o x)) → A
∈ On) |
| 121 | 120 | adantr 306 |
. . . . . . . . . . . . . . . . . . . . . . . 24
⊢ (((A
∈ On ∧ z ∈ (B +o x)) ∧ z
∈ On) → A ∈ On) |
| 122 | 121 | ad2antlr 321 |
. . . . . . . . . . . . . . . . . . . . . . 23
⊢ ((((Lim x ∧ (x
∈ On ∧ B ∈ On)) ∧
((A ∈ On ∧ z ∈ (B
+o x)) ∧ z ∈ On)) ∧ y ∈ x)
→ A ∈ On) |
| 123 | 110, 112, 119, 122 | syl3anc 629 |
. . . . . . . . . . . . . . . . . . . . . 22
⊢ ((((Lim x ∧ (x
∈ On ∧ B ∈ On)) ∧
((A ∈ On ∧ z ∈ (B
+o x)) ∧ z ∈ On)) ∧ y ∈ x)
→ (z ⊆ (B +o y) ↔ (A
+o z) ⊆ (A +o (B +o y)))) |
| 124 | 123 | birexdva 1216 |
. . . . . . . . . . . . . . . . . . . . 21
⊢ (((Lim x ∧ (x
∈ On ∧ B ∈ On)) ∧
((A ∈ On ∧ z ∈ (B
+o x)) ∧ z ∈ On)) → (∃y ∈ x
z ⊆ (B +o y) ↔ ∃y ∈ x
(A +o z) ⊆ (A
+o (B
+o y)))) |
| 125 | 109, 124 | mpbid 170 |
. . . . . . . . . . . . . . . . . . . 20
⊢ (((Lim x ∧ (x
∈ On ∧ B ∈ On)) ∧
((A ∈ On ∧ z ∈ (B
+o x)) ∧ z ∈ On)) → ∃y ∈ x
(A +o z) ⊆ (A
+o (B
+o y))) |
| 126 | 125 | exp32 294 |
. . . . . . . . . . . . . . . . . . 19
⊢ ((Lim x ∧ (x
∈ On ∧ B ∈ On)) →
((A ∈ On ∧ z ∈ (B
+o x)) → (z ∈ On → ∃y ∈ x
(A +o z) ⊆ (A
+o (B
+o y))))) |
| 127 | 62, 126 | mpdd 47 |
. . . . . . . . . . . . . . . . . 18
⊢ ((Lim x ∧ (x
∈ On ∧ B ∈ On)) →
((A ∈ On ∧ z ∈ (B
+o x)) →
∃y ∈ x (A
+o z) ⊆ (A +o (B +o y)))) |
| 128 | 127 | exp32 294 |
. . . . . . . . . . . . . . . . 17
⊢ (Lim x
→ (x ∈ On → (B ∈ On → ((A ∈ On ∧ z ∈ (B
+o x)) →
∃y ∈ x (A
+o z) ⊆ (A +o (B +o y)))))) |
| 129 | 55, 128 | mpd 46 |
. . . . . . . . . . . . . . . 16
⊢ (Lim x
→ (B ∈ On → ((A ∈ On ∧ z ∈ (B
+o x)) →
∃y ∈ x (A
+o z) ⊆ (A +o (B +o y))))) |
| 130 | 129 | exp4a 295 |
. . . . . . . . . . . . . . 15
⊢ (Lim x
→ (B ∈ On → (A ∈ On → (z ∈ (B
+o x) →
∃y ∈ x (A
+o z) ⊆ (A +o (B +o y)))))) |
| 131 | 130 | imp31 280 |
. . . . . . . . . . . . . 14
⊢ (((Lim x ∧ B ∈
On) ∧ A ∈ On) → (z ∈ (B
+o x) →
∃y ∈ x (A
+o z) ⊆ (A +o (B +o y)))) |
| 132 | 131 | r19.21aiv 1259 |
. . . . . . . . . . . . 13
⊢ (((Lim x ∧ B ∈
On) ∧ A ∈ On) →
∀z ∈ (B +o x)∃y
∈ x (A +o z) ⊆ (A
+o (B
+o y))) |
| 133 | | iunss2 2021 |
. . . . . . . . . . . . 13
⊢ (∀z ∈ (B
+o x)∃y ∈ x
(A +o z) ⊆ (A
+o (B
+o y)) → ∪z ∈ (B +o x)(A
+o z) ⊆ ∪y ∈ x (A
+o (B
+o y))) |
| 134 | 132, 133 | syl 12 |
. . . . . . . . . . . 12
⊢ (((Lim x ∧ B ∈
On) ∧ A ∈ On) → ∪z ∈ (B +o x)(A
+o z) ⊆ ∪y ∈ x (A
+o (B
+o y))) |
| 135 | 134 | ancoms 334 |
. . . . . . . . . . 11
⊢ ((A
∈ On ∧ (Lim x ∧ B ∈ On)) → ∪z ∈ (B +o x)(A
+o z) ⊆ ∪y ∈ x (A
+o (B
+o y))) |
| 136 | | oaordi 3148 |
. . . . . . . . . . . . . . . . . . 19
⊢ ((x
∈ On ∧ B ∈ On) →
(y ∈ x → (B
+o y) ∈ (B +o x))) |
| 137 | 136 | anim1d 432 |
. . . . . . . . . . . . . . . . . 18
⊢ ((x
∈ On ∧ B ∈ On) →
((y ∈ x ∧ w ∈
(A +o (B +o y))) → ((B
+o y) ∈ (B +o x) ∧ w
∈ (A +o (B +o y))))) |
| 138 | | opreq2 3007 |
. . . . . . . . . . . . . . . . . . . 20
⊢ (z =
(B +o y) → (A
+o z) = (A +o (B +o y))) |
| 139 | 138 | eleq2d 1156 |
. . . . . . . . . . . . . . . . . . 19
⊢ (z =
(B +o y) → (w
∈ (A +o z) ↔ w
∈ (A +o (B +o y)))) |
| 140 | 139 | rcla4ev 1403 |
. . . . . . . . . . . . . . . . . 18
⊢ (((B
+o y) ∈ (B +o x) ∧ w
∈ (A +o (B +o y))) → ∃z ∈ (B
+o x)w ∈ (A
+o z)) |
| 141 | 137, 140 | syl6 23 |
. . . . . . . . . . . . . . . . 17
⊢ ((x
∈ On ∧ B ∈ On) →
((y ∈ x ∧ w ∈
(A +o (B +o y))) → ∃z ∈ (B
+o x)w ∈ (A
+o z))) |
| 142 | 141 | exp3a 292 |
. . . . . . . . . . . . . . . 16
⊢ ((x
∈ On ∧ B ∈ On) →
(y ∈ x → (w
∈ (A +o (B +o y)) → ∃z ∈ (B
+o x)w ∈ (A
+o z)))) |
| 143 | 142 | r19.23adv 1286 |
. . . . . . . . . . . . . . 15
⊢ ((x
∈ On ∧ B ∈ On) →
(∃y ∈ x w ∈
(A +o (B +o y)) → ∃z ∈ (B
+o x)w ∈ (A
+o z))) |
| 144 | | eliun 1998 |
. . . . . . . . . . . . . . 15
⊢ (w
∈ ∪y ∈
x (A
+o (B
+o y)) ↔
∃y ∈ x w ∈
(A +o (B +o y))) |
| 145 | | eliun 1998 |
. . . . . . . . . . . . . . 15
⊢ (w
∈ ∪z ∈
(B +o x)(A
+o z) ↔
∃z ∈ (B +o x)w ∈
(A +o z)) |
| 146 | 143, 144, 145 | 3imtr4g 426 |
. . . . . . . . . . . . . 14
⊢ ((x
∈ On ∧ B ∈ On) →
(w ∈ ∪y ∈ x (A
+o (B
+o y)) → w ∈ ∪z ∈ (B
+o x)(A +o z))) |
| 147 | 146 | ssrdv 1509 |
. . . . . . . . . . . . 13
⊢ ((x
∈ On ∧ B ∈ On) → ∪y ∈ x (A
+o (B
+o y)) ⊆ ∪z ∈ (B +o x)(A
+o z)) |
| 148 | 147, 55 | sylan 343 |
. . . . . . . . . . . 12
⊢ ((Lim x ∧ B ∈
On) → ∪y
∈ x (A +o (B +o y)) ⊆ ∪z ∈ (B
+o x)(A +o z)) |
| 149 | 148 | adantl 305 |
. . . . . . . . . . 11
⊢ ((A
∈ On ∧ (Lim x ∧ B ∈ On)) → ∪y ∈ x (A
+o (B
+o y)) ⊆ ∪z ∈ (B +o x)(A
+o z)) |
| 150 | 135, 149 | eqssd 1518 |
. . . . . . . . . 10
⊢ ((A
∈ On ∧ (Lim x ∧ B ∈ On)) → ∪z ∈ (B +o x)(A
+o z) = ∪y ∈ x (A
+o (B
+o y))) |
| 151 | 53, 150 | eqtrd 1128 |
. . . . . . . . 9
⊢ ((A
∈ On ∧ (Lim x ∧ B ∈ On)) → (A +o (B +o x)) = ∪y ∈ x
(A +o (B +o y))) |
| 152 | 151 | an1s 372 |
. . . . . . . 8
⊢ ((Lim x ∧ (A
∈ On ∧ B ∈ On)) →
(A +o (B +o x)) = ∪y ∈ x
(A +o (B +o y))) |
| 153 | 152 | adantr 306 |
. . . . . . 7
⊢ (((Lim x ∧ (A
∈ On ∧ B ∈ On)) ∧
∀y ∈ x ((A
+o B)
+o y) = (A +o (B +o y))) → (A
+o (B
+o x)) = ∪y ∈ x (A
+o (B
+o y))) |
| 154 | 40, 46, 153 | 3eqtr4d 1134 |
. . . . . 6
⊢ (((Lim x ∧ (A
∈ On ∧ B ∈ On)) ∧
∀y ∈ x ((A
+o B)
+o y) = (A +o (B +o y))) → ((A
+o B)
+o x) = (A +o (B +o x))) |
| 155 | 154 | exp31 293 |
. . . . 5
⊢ (Lim x
→ ((A ∈ On ∧ B ∈ On) → (∀y ∈ x
((A +o B) +o y) = (A
+o (B
+o y)) → ((A +o B) +o x) = (A
+o (B
+o x))))) |
| 156 | 4, 8, 12, 16, 23, 38, 155 | tfinds3 2406 |
. . . 4
⊢ (C
∈ On → ((A ∈ On ∧
B ∈ On) → ((A +o B) +o C) = (A
+o (B
+o C)))) |
| 157 | 156 | com12 13 |
. . 3
⊢ ((A
∈ On ∧ B ∈ On) →
(C ∈ On → ((A +o B) +o C) = (A
+o (B
+o C)))) |
| 158 | 157 | exp 291 |
. 2
⊢ (A
∈ On → (B ∈ On →
(C ∈ On → ((A +o B) +o C) = (A
+o (B
+o C))))) |
| 159 | 158 | 3imp 608 |
1
⊢ ((A
∈ On ∧ B ∈ On ∧ C ∈ On) → ((A +o B) +o C) = (A
+o (B
+o C))) |