Proof of Theorem reclem1pr
| Step | Hyp | Ref
| Expression |
| 1 | | prpssnq 5159 |
. . . . . 6
⊢ (A ∈
P → A ⊂ Q) |
| 2 | | pssnel 2383 |
. . . . . 6
⊢ (A ⊂ Q
→ ∃x(x ∈ Q ⋀ ¬ x
∈ A)) |
| 3 | | recclpq 5137 |
. . . . . . . . . . 11
⊢ (x ∈
Q → (*Q ‘x) ∈
Q) |
| 4 | | dmrecpq 5139 |
. . . . . . . . . . . 12
⊢ dom
*Q = Q |
| 5 | | 0npq 5115 |
. . . . . . . . . . . 12
⊢ ¬ ∅ ∈
Q |
| 6 | 4, 5 | ndmfvrcl 3803 |
. . . . . . . . . . 11
⊢
((*Q ‘x) ∈
Q → x ∈ Q) |
| 7 | 3, 6 | impbii 164 |
. . . . . . . . . 10
⊢ (x ∈
Q ↔ (*Q ‘x) ∈
Q) |
| 8 | 7 | anbi1i 492 |
. . . . . . . . 9
⊢ ((x ∈
Q ⋀ ¬
(*Q ‘(*Q
‘x)) ∈ A) ↔
((*Q ‘x)
∈ Q ⋀ ¬ (*Q
‘(*Q ‘x)) ∈ A)) |
| 9 | | visset 1860 |
. . . . . . . . . . . . 13
⊢ x ∈
V |
| 10 | 9 | recrecpq 5138 |
. . . . . . . . . . . 12
⊢ (x ∈
Q → (*Q
‘(*Q ‘x)) = x) |
| 11 | 10 | eleq1d 1587 |
. . . . . . . . . . 11
⊢ (x ∈
Q → ((*Q
‘(*Q ‘x)) ∈ A ↔ x ∈ A)) |
| 12 | 11 | notbid 622 |
. . . . . . . . . 10
⊢ (x ∈
Q → (¬ (*Q
‘(*Q ‘x)) ∈ A ↔ ¬ x
∈ A)) |
| 13 | 12 | pm5.32i 656 |
. . . . . . . . 9
⊢ ((x ∈
Q ⋀ ¬
(*Q ‘(*Q
‘x)) ∈ A) ↔
(x ∈
Q ⋀ ¬ x ∈ A)) |
| 14 | 8, 13 | bitr3i 182 |
. . . . . . . 8
⊢
(((*Q ‘x) ∈
Q ⋀ ¬
(*Q ‘(*Q
‘x)) ∈ A) ↔
(x ∈
Q ⋀ ¬ x ∈ A)) |
| 15 | | fvex 3789 |
. . . . . . . . 9
⊢
(*Q ‘x) ∈
V |
| 16 | | eleq1 1581 |
. . . . . . . . . 10
⊢ (y = (*Q ‘x) → (y
∈ Q ↔
(*Q ‘x)
∈ Q)) |
| 17 | | fveq2 3781 |
. . . . . . . . . . . 12
⊢ (y = (*Q ‘x) → (*Q
‘y) = (*Q
‘(*Q ‘x))) |
| 18 | 17 | eleq1d 1587 |
. . . . . . . . . . 11
⊢ (y = (*Q ‘x) → ((*Q
‘y) ∈ A ↔
(*Q ‘(*Q
‘x)) ∈ A)) |
| 19 | 18 | notbid 622 |
. . . . . . . . . 10
⊢ (y = (*Q ‘x) → (¬ (*Q
‘y) ∈ A ↔
¬ (*Q ‘(*Q
‘x)) ∈ A)) |
| 20 | 16, 19 | anbi12d 639 |
. . . . . . . . 9
⊢ (y = (*Q ‘x) → ((y
∈ Q ⋀ ¬ (*Q
‘y) ∈ A) ↔
((*Q ‘x)
∈ Q ⋀ ¬ (*Q
‘(*Q ‘x)) ∈ A))) |
| 21 | 15, 20 | cla4ev 1916 |
. . . . . . . 8
⊢
(((*Q ‘x) ∈
Q ⋀ ¬
(*Q ‘(*Q
‘x)) ∈ A) →
∃y(y ∈ Q ⋀ ¬ (*Q
‘y) ∈ A)) |
| 22 | 14, 21 | sylbir 208 |
. . . . . . 7
⊢ ((x ∈
Q ⋀ ¬ x ∈ A) → ∃y(y ∈
Q ⋀ ¬
(*Q ‘y)
∈ A)) |
| 23 | 22 | 19.23aiv 1337 |
. . . . . 6
⊢ (∃x(x ∈
Q ⋀ ¬ x ∈ A) → ∃y(y ∈
Q ⋀ ¬
(*Q ‘y)
∈ A)) |
| 24 | 1, 2, 23 | 3syl 20 |
. . . . 5
⊢ (A ∈
P → ∃y(y ∈ Q ⋀ ¬ (*Q
‘y) ∈ A)) |
| 25 | | nsmallpq 5148 |
. . . . . . . 8
⊢ (y ∈
Q → ∃x x
<Q y) |
| 26 | 25 | anim1i 341 |
. . . . . . 7
⊢ ((y ∈
Q ⋀ ¬
(*Q ‘y)
∈ A)
→ (∃x x
<Q y ⋀ ¬ (*Q
‘y) ∈ A)) |
| 27 | | 19.41v 1347 |
. . . . . . 7
⊢ (∃x(x <Q y ⋀ ¬
(*Q ‘y)
∈ A)
↔ (∃x x
<Q y ⋀ ¬ (*Q
‘y) ∈ A)) |
| 28 | 26, 27 | sylibr 207 |
. . . . . 6
⊢ ((y ∈
Q ⋀ ¬
(*Q ‘y)
∈ A)
→ ∃x(x
<Q y ⋀ ¬ (*Q
‘y) ∈ A)) |
| 29 | 28 | 19.22i 1081 |
. . . . 5
⊢ (∃y(y ∈
Q ⋀ ¬
(*Q ‘y)
∈ A)
→ ∃y∃x(x
<Q y ⋀ ¬ (*Q
‘y) ∈ A)) |
| 30 | 24, 29 | syl 10 |
. . . 4
⊢ (A ∈
P → ∃y∃x(x
<Q y ⋀ ¬ (*Q
‘y) ∈ A)) |
| 31 | | excom 1087 |
. . . 4
⊢ (∃x∃y(x <Q y ⋀ ¬
(*Q ‘y)
∈ A)
↔ ∃y∃x(x
<Q y ⋀ ¬ (*Q
‘y) ∈ A)) |
| 32 | 30, 31 | sylibr 207 |
. . 3
⊢ (A ∈
P → ∃x∃y(x
<Q y ⋀ ¬ (*Q
‘y) ∈ A)) |
| 33 | | reclempr.1 |
. . . . 5
⊢ B = {x∣∃y(x
<Q y ⋀ ¬ (*Q
‘y) ∈ A)} |
| 34 | 33 | abeq2i 1617 |
. . . 4
⊢ (x ∈ B ↔ ∃y(x <Q y ⋀ ¬
(*Q ‘y)
∈ A)) |
| 35 | 34 | exbii 1092 |
. . 3
⊢ (∃x x ∈ B ↔ ∃x∃y(x <Q y ⋀ ¬
(*Q ‘y)
∈ A)) |
| 36 | 32, 35 | sylibr 207 |
. 2
⊢ (A ∈
P → ∃x x ∈ B) |
| 37 | | 0pss 2360 |
. . 3
⊢ (∅ ⊂ B ↔ B ≠
∅) |
| 38 | | ne0 2340 |
. . 3
⊢ (B ≠ ∅ ↔
∃x
x ∈
B) |
| 39 | 37, 38 | bitri 180 |
. 2
⊢ (∅ ⊂ B ↔ ∃x x ∈ B) |
| 40 | 36, 39 | sylibr 207 |
1
⊢ (A ∈
P → ∅ ⊂ B) |