Proof of Theorem setsfun0
Step | Hyp | Ref
| Expression |
1 | | funres 5843 |
. . . . . 6
⊢ (Fun
(𝐺 ∖ {∅})
→ Fun ((𝐺 ∖
{∅}) ↾ (V ∖ dom {〈𝐼, 𝐸〉}))) |
2 | 1 | adantl 481 |
. . . . 5
⊢ ((𝐺 ∈ 𝑉 ∧ Fun (𝐺 ∖ {∅})) → Fun ((𝐺 ∖ {∅}) ↾ (V
∖ dom {〈𝐼, 𝐸〉}))) |
3 | 2 | adantr 480 |
. . . 4
⊢ (((𝐺 ∈ 𝑉 ∧ Fun (𝐺 ∖ {∅})) ∧ (𝐼 ∈ 𝑈 ∧ 𝐸 ∈ 𝑊)) → Fun ((𝐺 ∖ {∅}) ↾ (V ∖ dom
{〈𝐼, 𝐸〉}))) |
4 | | funsng 5851 |
. . . . 5
⊢ ((𝐼 ∈ 𝑈 ∧ 𝐸 ∈ 𝑊) → Fun {〈𝐼, 𝐸〉}) |
5 | 4 | adantl 481 |
. . . 4
⊢ (((𝐺 ∈ 𝑉 ∧ Fun (𝐺 ∖ {∅})) ∧ (𝐼 ∈ 𝑈 ∧ 𝐸 ∈ 𝑊)) → Fun {〈𝐼, 𝐸〉}) |
6 | | dmres 5339 |
. . . . . . 7
⊢ dom
((𝐺 ∖ {∅})
↾ (V ∖ dom {〈𝐼, 𝐸〉})) = ((V ∖ dom {〈𝐼, 𝐸〉}) ∩ dom (𝐺 ∖ {∅})) |
7 | 6 | ineq1i 3772 |
. . . . . 6
⊢ (dom
((𝐺 ∖ {∅})
↾ (V ∖ dom {〈𝐼, 𝐸〉})) ∩ dom {〈𝐼, 𝐸〉}) = (((V ∖ dom {〈𝐼, 𝐸〉}) ∩ dom (𝐺 ∖ {∅})) ∩ dom {〈𝐼, 𝐸〉}) |
8 | | in32 3787 |
. . . . . . 7
⊢ (((V
∖ dom {〈𝐼, 𝐸〉}) ∩ dom (𝐺 ∖ {∅})) ∩ dom
{〈𝐼, 𝐸〉}) = (((V ∖ dom {〈𝐼, 𝐸〉}) ∩ dom {〈𝐼, 𝐸〉}) ∩ dom (𝐺 ∖ {∅})) |
9 | | incom 3767 |
. . . . . . . . 9
⊢ ((V
∖ dom {〈𝐼, 𝐸〉}) ∩ dom {〈𝐼, 𝐸〉}) = (dom {〈𝐼, 𝐸〉} ∩ (V ∖ dom {〈𝐼, 𝐸〉})) |
10 | | disjdif 3992 |
. . . . . . . . 9
⊢ (dom
{〈𝐼, 𝐸〉} ∩ (V ∖ dom {〈𝐼, 𝐸〉})) = ∅ |
11 | 9, 10 | eqtri 2632 |
. . . . . . . 8
⊢ ((V
∖ dom {〈𝐼, 𝐸〉}) ∩ dom {〈𝐼, 𝐸〉}) = ∅ |
12 | 11 | ineq1i 3772 |
. . . . . . 7
⊢ (((V
∖ dom {〈𝐼, 𝐸〉}) ∩ dom {〈𝐼, 𝐸〉}) ∩ dom (𝐺 ∖ {∅})) = (∅ ∩ dom
(𝐺 ∖
{∅})) |
13 | | 0in 3921 |
. . . . . . 7
⊢ (∅
∩ dom (𝐺 ∖
{∅})) = ∅ |
14 | 8, 12, 13 | 3eqtri 2636 |
. . . . . 6
⊢ (((V
∖ dom {〈𝐼, 𝐸〉}) ∩ dom (𝐺 ∖ {∅})) ∩ dom
{〈𝐼, 𝐸〉}) = ∅ |
15 | 7, 14 | eqtri 2632 |
. . . . 5
⊢ (dom
((𝐺 ∖ {∅})
↾ (V ∖ dom {〈𝐼, 𝐸〉})) ∩ dom {〈𝐼, 𝐸〉}) = ∅ |
16 | 15 | a1i 11 |
. . . 4
⊢ (((𝐺 ∈ 𝑉 ∧ Fun (𝐺 ∖ {∅})) ∧ (𝐼 ∈ 𝑈 ∧ 𝐸 ∈ 𝑊)) → (dom ((𝐺 ∖ {∅}) ↾ (V ∖ dom
{〈𝐼, 𝐸〉})) ∩ dom {〈𝐼, 𝐸〉}) = ∅) |
17 | | funun 5846 |
. . . 4
⊢ (((Fun
((𝐺 ∖ {∅})
↾ (V ∖ dom {〈𝐼, 𝐸〉})) ∧ Fun {〈𝐼, 𝐸〉}) ∧ (dom ((𝐺 ∖ {∅}) ↾ (V ∖ dom
{〈𝐼, 𝐸〉})) ∩ dom {〈𝐼, 𝐸〉}) = ∅) → Fun (((𝐺 ∖ {∅}) ↾ (V
∖ dom {〈𝐼, 𝐸〉})) ∪ {〈𝐼, 𝐸〉})) |
18 | 3, 5, 16, 17 | syl21anc 1317 |
. . 3
⊢ (((𝐺 ∈ 𝑉 ∧ Fun (𝐺 ∖ {∅})) ∧ (𝐼 ∈ 𝑈 ∧ 𝐸 ∈ 𝑊)) → Fun (((𝐺 ∖ {∅}) ↾ (V ∖ dom
{〈𝐼, 𝐸〉})) ∪ {〈𝐼, 𝐸〉})) |
19 | | difundir 3839 |
. . . . 5
⊢ (((𝐺 ↾ (V ∖ dom
{〈𝐼, 𝐸〉})) ∪ {〈𝐼, 𝐸〉}) ∖ {∅}) = (((𝐺 ↾ (V ∖ dom
{〈𝐼, 𝐸〉})) ∖ {∅}) ∪
({〈𝐼, 𝐸〉} ∖
{∅})) |
20 | | resdifcom 5335 |
. . . . . . 7
⊢ ((𝐺 ↾ (V ∖ dom
{〈𝐼, 𝐸〉})) ∖ {∅}) = ((𝐺 ∖ {∅}) ↾ (V
∖ dom {〈𝐼, 𝐸〉})) |
21 | 20 | a1i 11 |
. . . . . 6
⊢ (((𝐺 ∈ 𝑉 ∧ Fun (𝐺 ∖ {∅})) ∧ (𝐼 ∈ 𝑈 ∧ 𝐸 ∈ 𝑊)) → ((𝐺 ↾ (V ∖ dom {〈𝐼, 𝐸〉})) ∖ {∅}) = ((𝐺 ∖ {∅}) ↾ (V
∖ dom {〈𝐼, 𝐸〉}))) |
22 | | elex 3185 |
. . . . . . . . . 10
⊢ (𝐼 ∈ 𝑈 → 𝐼 ∈ V) |
23 | | elex 3185 |
. . . . . . . . . 10
⊢ (𝐸 ∈ 𝑊 → 𝐸 ∈ V) |
24 | 22, 23 | anim12i 588 |
. . . . . . . . 9
⊢ ((𝐼 ∈ 𝑈 ∧ 𝐸 ∈ 𝑊) → (𝐼 ∈ V ∧ 𝐸 ∈ V)) |
25 | | opnz 4868 |
. . . . . . . . 9
⊢
(〈𝐼, 𝐸〉 ≠ ∅ ↔
(𝐼 ∈ V ∧ 𝐸 ∈ V)) |
26 | 24, 25 | sylibr 223 |
. . . . . . . 8
⊢ ((𝐼 ∈ 𝑈 ∧ 𝐸 ∈ 𝑊) → 〈𝐼, 𝐸〉 ≠ ∅) |
27 | 26 | adantl 481 |
. . . . . . 7
⊢ (((𝐺 ∈ 𝑉 ∧ Fun (𝐺 ∖ {∅})) ∧ (𝐼 ∈ 𝑈 ∧ 𝐸 ∈ 𝑊)) → 〈𝐼, 𝐸〉 ≠ ∅) |
28 | | disjsn2 4193 |
. . . . . . 7
⊢
(〈𝐼, 𝐸〉 ≠ ∅ →
({〈𝐼, 𝐸〉} ∩ {∅}) =
∅) |
29 | | disjdif2 3999 |
. . . . . . 7
⊢
(({〈𝐼, 𝐸〉} ∩ {∅}) =
∅ → ({〈𝐼,
𝐸〉} ∖ {∅})
= {〈𝐼, 𝐸〉}) |
30 | 27, 28, 29 | 3syl 18 |
. . . . . 6
⊢ (((𝐺 ∈ 𝑉 ∧ Fun (𝐺 ∖ {∅})) ∧ (𝐼 ∈ 𝑈 ∧ 𝐸 ∈ 𝑊)) → ({〈𝐼, 𝐸〉} ∖ {∅}) = {〈𝐼, 𝐸〉}) |
31 | 21, 30 | uneq12d 3730 |
. . . . 5
⊢ (((𝐺 ∈ 𝑉 ∧ Fun (𝐺 ∖ {∅})) ∧ (𝐼 ∈ 𝑈 ∧ 𝐸 ∈ 𝑊)) → (((𝐺 ↾ (V ∖ dom {〈𝐼, 𝐸〉})) ∖ {∅}) ∪
({〈𝐼, 𝐸〉} ∖ {∅})) =
(((𝐺 ∖ {∅})
↾ (V ∖ dom {〈𝐼, 𝐸〉})) ∪ {〈𝐼, 𝐸〉})) |
32 | 19, 31 | syl5eq 2656 |
. . . 4
⊢ (((𝐺 ∈ 𝑉 ∧ Fun (𝐺 ∖ {∅})) ∧ (𝐼 ∈ 𝑈 ∧ 𝐸 ∈ 𝑊)) → (((𝐺 ↾ (V ∖ dom {〈𝐼, 𝐸〉})) ∪ {〈𝐼, 𝐸〉}) ∖ {∅}) = (((𝐺 ∖ {∅}) ↾ (V
∖ dom {〈𝐼, 𝐸〉})) ∪ {〈𝐼, 𝐸〉})) |
33 | 32 | funeqd 5825 |
. . 3
⊢ (((𝐺 ∈ 𝑉 ∧ Fun (𝐺 ∖ {∅})) ∧ (𝐼 ∈ 𝑈 ∧ 𝐸 ∈ 𝑊)) → (Fun (((𝐺 ↾ (V ∖ dom {〈𝐼, 𝐸〉})) ∪ {〈𝐼, 𝐸〉}) ∖ {∅}) ↔ Fun
(((𝐺 ∖ {∅})
↾ (V ∖ dom {〈𝐼, 𝐸〉})) ∪ {〈𝐼, 𝐸〉}))) |
34 | 18, 33 | mpbird 246 |
. 2
⊢ (((𝐺 ∈ 𝑉 ∧ Fun (𝐺 ∖ {∅})) ∧ (𝐼 ∈ 𝑈 ∧ 𝐸 ∈ 𝑊)) → Fun (((𝐺 ↾ (V ∖ dom {〈𝐼, 𝐸〉})) ∪ {〈𝐼, 𝐸〉}) ∖
{∅})) |
35 | | opex 4859 |
. . . . . . 7
⊢
〈𝐼, 𝐸〉 ∈ V |
36 | 35 | a1i 11 |
. . . . . 6
⊢ (Fun
(𝐺 ∖ {∅})
→ 〈𝐼, 𝐸〉 ∈
V) |
37 | | setsvalg 15719 |
. . . . . 6
⊢ ((𝐺 ∈ 𝑉 ∧ 〈𝐼, 𝐸〉 ∈ V) → (𝐺 sSet 〈𝐼, 𝐸〉) = ((𝐺 ↾ (V ∖ dom {〈𝐼, 𝐸〉})) ∪ {〈𝐼, 𝐸〉})) |
38 | 36, 37 | sylan2 490 |
. . . . 5
⊢ ((𝐺 ∈ 𝑉 ∧ Fun (𝐺 ∖ {∅})) → (𝐺 sSet 〈𝐼, 𝐸〉) = ((𝐺 ↾ (V ∖ dom {〈𝐼, 𝐸〉})) ∪ {〈𝐼, 𝐸〉})) |
39 | 38 | difeq1d 3689 |
. . . 4
⊢ ((𝐺 ∈ 𝑉 ∧ Fun (𝐺 ∖ {∅})) → ((𝐺 sSet 〈𝐼, 𝐸〉) ∖ {∅}) = (((𝐺 ↾ (V ∖ dom
{〈𝐼, 𝐸〉})) ∪ {〈𝐼, 𝐸〉}) ∖
{∅})) |
40 | 39 | funeqd 5825 |
. . 3
⊢ ((𝐺 ∈ 𝑉 ∧ Fun (𝐺 ∖ {∅})) → (Fun ((𝐺 sSet 〈𝐼, 𝐸〉) ∖ {∅}) ↔ Fun
(((𝐺 ↾ (V ∖ dom
{〈𝐼, 𝐸〉})) ∪ {〈𝐼, 𝐸〉}) ∖
{∅}))) |
41 | 40 | adantr 480 |
. 2
⊢ (((𝐺 ∈ 𝑉 ∧ Fun (𝐺 ∖ {∅})) ∧ (𝐼 ∈ 𝑈 ∧ 𝐸 ∈ 𝑊)) → (Fun ((𝐺 sSet 〈𝐼, 𝐸〉) ∖ {∅}) ↔ Fun
(((𝐺 ↾ (V ∖ dom
{〈𝐼, 𝐸〉})) ∪ {〈𝐼, 𝐸〉}) ∖
{∅}))) |
42 | 34, 41 | mpbird 246 |
1
⊢ (((𝐺 ∈ 𝑉 ∧ Fun (𝐺 ∖ {∅})) ∧ (𝐼 ∈ 𝑈 ∧ 𝐸 ∈ 𝑊)) → Fun ((𝐺 sSet 〈𝐼, 𝐸〉) ∖ {∅})) |