| Step |
Hyp |
Ref |
Expression |
| 1 |
|
simp1 |
⊢ ( ( 𝑥 ⊆ 𝐴 ∧ 𝑟 ⊆ ( 𝑥 × 𝑥 ) ∧ 𝑟 We 𝑥 ) → 𝑥 ⊆ 𝐴 ) |
| 2 |
|
velpw |
⊢ ( 𝑥 ∈ 𝒫 𝐴 ↔ 𝑥 ⊆ 𝐴 ) |
| 3 |
1 2
|
sylibr |
⊢ ( ( 𝑥 ⊆ 𝐴 ∧ 𝑟 ⊆ ( 𝑥 × 𝑥 ) ∧ 𝑟 We 𝑥 ) → 𝑥 ∈ 𝒫 𝐴 ) |
| 4 |
|
simp2 |
⊢ ( ( 𝑥 ⊆ 𝐴 ∧ 𝑟 ⊆ ( 𝑥 × 𝑥 ) ∧ 𝑟 We 𝑥 ) → 𝑟 ⊆ ( 𝑥 × 𝑥 ) ) |
| 5 |
|
xpss12 |
⊢ ( ( 𝑥 ⊆ 𝐴 ∧ 𝑥 ⊆ 𝐴 ) → ( 𝑥 × 𝑥 ) ⊆ ( 𝐴 × 𝐴 ) ) |
| 6 |
1 1 5
|
syl2anc |
⊢ ( ( 𝑥 ⊆ 𝐴 ∧ 𝑟 ⊆ ( 𝑥 × 𝑥 ) ∧ 𝑟 We 𝑥 ) → ( 𝑥 × 𝑥 ) ⊆ ( 𝐴 × 𝐴 ) ) |
| 7 |
4 6
|
sstrd |
⊢ ( ( 𝑥 ⊆ 𝐴 ∧ 𝑟 ⊆ ( 𝑥 × 𝑥 ) ∧ 𝑟 We 𝑥 ) → 𝑟 ⊆ ( 𝐴 × 𝐴 ) ) |
| 8 |
|
velpw |
⊢ ( 𝑟 ∈ 𝒫 ( 𝐴 × 𝐴 ) ↔ 𝑟 ⊆ ( 𝐴 × 𝐴 ) ) |
| 9 |
7 8
|
sylibr |
⊢ ( ( 𝑥 ⊆ 𝐴 ∧ 𝑟 ⊆ ( 𝑥 × 𝑥 ) ∧ 𝑟 We 𝑥 ) → 𝑟 ∈ 𝒫 ( 𝐴 × 𝐴 ) ) |
| 10 |
3 9
|
jca |
⊢ ( ( 𝑥 ⊆ 𝐴 ∧ 𝑟 ⊆ ( 𝑥 × 𝑥 ) ∧ 𝑟 We 𝑥 ) → ( 𝑥 ∈ 𝒫 𝐴 ∧ 𝑟 ∈ 𝒫 ( 𝐴 × 𝐴 ) ) ) |
| 11 |
10
|
eximi |
⊢ ( ∃ 𝑥 ( 𝑥 ⊆ 𝐴 ∧ 𝑟 ⊆ ( 𝑥 × 𝑥 ) ∧ 𝑟 We 𝑥 ) → ∃ 𝑥 ( 𝑥 ∈ 𝒫 𝐴 ∧ 𝑟 ∈ 𝒫 ( 𝐴 × 𝐴 ) ) ) |
| 12 |
11
|
ss2abi |
⊢ { 𝑟 ∣ ∃ 𝑥 ( 𝑥 ⊆ 𝐴 ∧ 𝑟 ⊆ ( 𝑥 × 𝑥 ) ∧ 𝑟 We 𝑥 ) } ⊆ { 𝑟 ∣ ∃ 𝑥 ( 𝑥 ∈ 𝒫 𝐴 ∧ 𝑟 ∈ 𝒫 ( 𝐴 × 𝐴 ) ) } |
| 13 |
|
simpr |
⊢ ( ( 𝑥 ∈ 𝒫 𝐴 ∧ 𝑟 ∈ 𝒫 ( 𝐴 × 𝐴 ) ) → 𝑟 ∈ 𝒫 ( 𝐴 × 𝐴 ) ) |
| 14 |
13
|
exlimiv |
⊢ ( ∃ 𝑥 ( 𝑥 ∈ 𝒫 𝐴 ∧ 𝑟 ∈ 𝒫 ( 𝐴 × 𝐴 ) ) → 𝑟 ∈ 𝒫 ( 𝐴 × 𝐴 ) ) |
| 15 |
14
|
ss2abi |
⊢ { 𝑟 ∣ ∃ 𝑥 ( 𝑥 ∈ 𝒫 𝐴 ∧ 𝑟 ∈ 𝒫 ( 𝐴 × 𝐴 ) ) } ⊆ { 𝑟 ∣ 𝑟 ∈ 𝒫 ( 𝐴 × 𝐴 ) } |
| 16 |
12 15
|
sstri |
⊢ { 𝑟 ∣ ∃ 𝑥 ( 𝑥 ⊆ 𝐴 ∧ 𝑟 ⊆ ( 𝑥 × 𝑥 ) ∧ 𝑟 We 𝑥 ) } ⊆ { 𝑟 ∣ 𝑟 ∈ 𝒫 ( 𝐴 × 𝐴 ) } |
| 17 |
|
abid2 |
⊢ { 𝑟 ∣ 𝑟 ∈ 𝒫 ( 𝐴 × 𝐴 ) } = 𝒫 ( 𝐴 × 𝐴 ) |
| 18 |
|
sqxpexg |
⊢ ( 𝐴 ∈ 𝑉 → ( 𝐴 × 𝐴 ) ∈ V ) |
| 19 |
18
|
pwexd |
⊢ ( 𝐴 ∈ 𝑉 → 𝒫 ( 𝐴 × 𝐴 ) ∈ V ) |
| 20 |
17 19
|
eqeltrid |
⊢ ( 𝐴 ∈ 𝑉 → { 𝑟 ∣ 𝑟 ∈ 𝒫 ( 𝐴 × 𝐴 ) } ∈ V ) |
| 21 |
|
ssexg |
⊢ ( ( { 𝑟 ∣ ∃ 𝑥 ( 𝑥 ⊆ 𝐴 ∧ 𝑟 ⊆ ( 𝑥 × 𝑥 ) ∧ 𝑟 We 𝑥 ) } ⊆ { 𝑟 ∣ 𝑟 ∈ 𝒫 ( 𝐴 × 𝐴 ) } ∧ { 𝑟 ∣ 𝑟 ∈ 𝒫 ( 𝐴 × 𝐴 ) } ∈ V ) → { 𝑟 ∣ ∃ 𝑥 ( 𝑥 ⊆ 𝐴 ∧ 𝑟 ⊆ ( 𝑥 × 𝑥 ) ∧ 𝑟 We 𝑥 ) } ∈ V ) |
| 22 |
16 20 21
|
sylancr |
⊢ ( 𝐴 ∈ 𝑉 → { 𝑟 ∣ ∃ 𝑥 ( 𝑥 ⊆ 𝐴 ∧ 𝑟 ⊆ ( 𝑥 × 𝑥 ) ∧ 𝑟 We 𝑥 ) } ∈ V ) |