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Theorem restutopopn 23380
Description: The restriction of the topology induced by an uniform structure to an open set. (Contributed by Thierry Arnoux, 16-Dec-2017.)
Assertion
Ref Expression
restutopopn ((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) → ((unifTop‘𝑈) ↾t 𝐴) = (unifTop‘(𝑈t (𝐴 × 𝐴))))

Proof of Theorem restutopopn
Dummy variables 𝑎 𝑏 𝑡 𝑢 𝑤 𝑥 𝑣 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 elutop 23375 . . . 4 (𝑈 ∈ (UnifOn‘𝑋) → (𝐴 ∈ (unifTop‘𝑈) ↔ (𝐴𝑋 ∧ ∀𝑥𝐴𝑡𝑈 (𝑡 “ {𝑥}) ⊆ 𝐴)))
21simprbda 499 . . 3 ((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) → 𝐴𝑋)
3 restutop 23379 . . 3 ((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴𝑋) → ((unifTop‘𝑈) ↾t 𝐴) ⊆ (unifTop‘(𝑈t (𝐴 × 𝐴))))
42, 3syldan 591 . 2 ((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) → ((unifTop‘𝑈) ↾t 𝐴) ⊆ (unifTop‘(𝑈t (𝐴 × 𝐴))))
5 trust 23371 . . . . . . . . 9 ((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴𝑋) → (𝑈t (𝐴 × 𝐴)) ∈ (UnifOn‘𝐴))
62, 5syldan 591 . . . . . . . 8 ((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) → (𝑈t (𝐴 × 𝐴)) ∈ (UnifOn‘𝐴))
7 elutop 23375 . . . . . . . 8 ((𝑈t (𝐴 × 𝐴)) ∈ (UnifOn‘𝐴) → (𝑏 ∈ (unifTop‘(𝑈t (𝐴 × 𝐴))) ↔ (𝑏𝐴 ∧ ∀𝑥𝑏𝑢 ∈ (𝑈t (𝐴 × 𝐴))(𝑢 “ {𝑥}) ⊆ 𝑏)))
86, 7syl 17 . . . . . . 7 ((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) → (𝑏 ∈ (unifTop‘(𝑈t (𝐴 × 𝐴))) ↔ (𝑏𝐴 ∧ ∀𝑥𝑏𝑢 ∈ (𝑈t (𝐴 × 𝐴))(𝑢 “ {𝑥}) ⊆ 𝑏)))
98simprbda 499 . . . . . 6 (((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) ∧ 𝑏 ∈ (unifTop‘(𝑈t (𝐴 × 𝐴)))) → 𝑏𝐴)
102adantr 481 . . . . . 6 (((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) ∧ 𝑏 ∈ (unifTop‘(𝑈t (𝐴 × 𝐴)))) → 𝐴𝑋)
119, 10sstrd 3936 . . . . 5 (((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) ∧ 𝑏 ∈ (unifTop‘(𝑈t (𝐴 × 𝐴)))) → 𝑏𝑋)
12 simp-9l 790 . . . . . . . . . . 11 ((((((((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) ∧ 𝑏 ∈ (unifTop‘(𝑈t (𝐴 × 𝐴)))) ∧ 𝑥𝑏) ∧ 𝑢 ∈ (𝑈t (𝐴 × 𝐴))) ∧ (𝑢 “ {𝑥}) ⊆ 𝑏) ∧ 𝑤𝑈) ∧ 𝑢 = (𝑤 ∩ (𝐴 × 𝐴))) ∧ 𝑡𝑈) ∧ (𝑡 “ {𝑥}) ⊆ 𝐴) → 𝑈 ∈ (UnifOn‘𝑋))
13 simplr 766 . . . . . . . . . . 11 ((((((((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) ∧ 𝑏 ∈ (unifTop‘(𝑈t (𝐴 × 𝐴)))) ∧ 𝑥𝑏) ∧ 𝑢 ∈ (𝑈t (𝐴 × 𝐴))) ∧ (𝑢 “ {𝑥}) ⊆ 𝑏) ∧ 𝑤𝑈) ∧ 𝑢 = (𝑤 ∩ (𝐴 × 𝐴))) ∧ 𝑡𝑈) ∧ (𝑡 “ {𝑥}) ⊆ 𝐴) → 𝑡𝑈)
14 simp-4r 781 . . . . . . . . . . 11 ((((((((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) ∧ 𝑏 ∈ (unifTop‘(𝑈t (𝐴 × 𝐴)))) ∧ 𝑥𝑏) ∧ 𝑢 ∈ (𝑈t (𝐴 × 𝐴))) ∧ (𝑢 “ {𝑥}) ⊆ 𝑏) ∧ 𝑤𝑈) ∧ 𝑢 = (𝑤 ∩ (𝐴 × 𝐴))) ∧ 𝑡𝑈) ∧ (𝑡 “ {𝑥}) ⊆ 𝐴) → 𝑤𝑈)
15 ustincl 23349 . . . . . . . . . . 11 ((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝑡𝑈𝑤𝑈) → (𝑡𝑤) ∈ 𝑈)
1612, 13, 14, 15syl3anc 1370 . . . . . . . . . 10 ((((((((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) ∧ 𝑏 ∈ (unifTop‘(𝑈t (𝐴 × 𝐴)))) ∧ 𝑥𝑏) ∧ 𝑢 ∈ (𝑈t (𝐴 × 𝐴))) ∧ (𝑢 “ {𝑥}) ⊆ 𝑏) ∧ 𝑤𝑈) ∧ 𝑢 = (𝑤 ∩ (𝐴 × 𝐴))) ∧ 𝑡𝑈) ∧ (𝑡 “ {𝑥}) ⊆ 𝐴) → (𝑡𝑤) ∈ 𝑈)
17 inimass 6056 . . . . . . . . . . 11 ((𝑡𝑤) “ {𝑥}) ⊆ ((𝑡 “ {𝑥}) ∩ (𝑤 “ {𝑥}))
18 ssrin 4173 . . . . . . . . . . . . . 14 ((𝑡 “ {𝑥}) ⊆ 𝐴 → ((𝑡 “ {𝑥}) ∩ (𝑤 “ {𝑥})) ⊆ (𝐴 ∩ (𝑤 “ {𝑥})))
1918adantl 482 . . . . . . . . . . . . 13 ((((((((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) ∧ 𝑏 ∈ (unifTop‘(𝑈t (𝐴 × 𝐴)))) ∧ 𝑥𝑏) ∧ 𝑢 ∈ (𝑈t (𝐴 × 𝐴))) ∧ (𝑢 “ {𝑥}) ⊆ 𝑏) ∧ 𝑤𝑈) ∧ 𝑢 = (𝑤 ∩ (𝐴 × 𝐴))) ∧ 𝑡𝑈) ∧ (𝑡 “ {𝑥}) ⊆ 𝐴) → ((𝑡 “ {𝑥}) ∩ (𝑤 “ {𝑥})) ⊆ (𝐴 ∩ (𝑤 “ {𝑥})))
20 simpllr 773 . . . . . . . . . . . . . . 15 ((((((((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) ∧ 𝑏 ∈ (unifTop‘(𝑈t (𝐴 × 𝐴)))) ∧ 𝑥𝑏) ∧ 𝑢 ∈ (𝑈t (𝐴 × 𝐴))) ∧ (𝑢 “ {𝑥}) ⊆ 𝑏) ∧ 𝑤𝑈) ∧ 𝑢 = (𝑤 ∩ (𝐴 × 𝐴))) ∧ 𝑡𝑈) ∧ (𝑡 “ {𝑥}) ⊆ 𝐴) → 𝑢 = (𝑤 ∩ (𝐴 × 𝐴)))
2120imaeq1d 5966 . . . . . . . . . . . . . 14 ((((((((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) ∧ 𝑏 ∈ (unifTop‘(𝑈t (𝐴 × 𝐴)))) ∧ 𝑥𝑏) ∧ 𝑢 ∈ (𝑈t (𝐴 × 𝐴))) ∧ (𝑢 “ {𝑥}) ⊆ 𝑏) ∧ 𝑤𝑈) ∧ 𝑢 = (𝑤 ∩ (𝐴 × 𝐴))) ∧ 𝑡𝑈) ∧ (𝑡 “ {𝑥}) ⊆ 𝐴) → (𝑢 “ {𝑥}) = ((𝑤 ∩ (𝐴 × 𝐴)) “ {𝑥}))
229ad5antr 731 . . . . . . . . . . . . . . . . 17 ((((((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) ∧ 𝑏 ∈ (unifTop‘(𝑈t (𝐴 × 𝐴)))) ∧ 𝑥𝑏) ∧ 𝑢 ∈ (𝑈t (𝐴 × 𝐴))) ∧ (𝑢 “ {𝑥}) ⊆ 𝑏) ∧ 𝑤𝑈) ∧ 𝑢 = (𝑤 ∩ (𝐴 × 𝐴))) → 𝑏𝐴)
23 simp-5r 783 . . . . . . . . . . . . . . . . 17 ((((((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) ∧ 𝑏 ∈ (unifTop‘(𝑈t (𝐴 × 𝐴)))) ∧ 𝑥𝑏) ∧ 𝑢 ∈ (𝑈t (𝐴 × 𝐴))) ∧ (𝑢 “ {𝑥}) ⊆ 𝑏) ∧ 𝑤𝑈) ∧ 𝑢 = (𝑤 ∩ (𝐴 × 𝐴))) → 𝑥𝑏)
2422, 23sseldd 3927 . . . . . . . . . . . . . . . 16 ((((((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) ∧ 𝑏 ∈ (unifTop‘(𝑈t (𝐴 × 𝐴)))) ∧ 𝑥𝑏) ∧ 𝑢 ∈ (𝑈t (𝐴 × 𝐴))) ∧ (𝑢 “ {𝑥}) ⊆ 𝑏) ∧ 𝑤𝑈) ∧ 𝑢 = (𝑤 ∩ (𝐴 × 𝐴))) → 𝑥𝐴)
2524ad2antrr 723 . . . . . . . . . . . . . . 15 ((((((((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) ∧ 𝑏 ∈ (unifTop‘(𝑈t (𝐴 × 𝐴)))) ∧ 𝑥𝑏) ∧ 𝑢 ∈ (𝑈t (𝐴 × 𝐴))) ∧ (𝑢 “ {𝑥}) ⊆ 𝑏) ∧ 𝑤𝑈) ∧ 𝑢 = (𝑤 ∩ (𝐴 × 𝐴))) ∧ 𝑡𝑈) ∧ (𝑡 “ {𝑥}) ⊆ 𝐴) → 𝑥𝐴)
26 inimasn 6057 . . . . . . . . . . . . . . . . . 18 (𝑥 ∈ V → ((𝑤 ∩ (𝐴 × 𝐴)) “ {𝑥}) = ((𝑤 “ {𝑥}) ∩ ((𝐴 × 𝐴) “ {𝑥})))
2726elv 3437 . . . . . . . . . . . . . . . . 17 ((𝑤 ∩ (𝐴 × 𝐴)) “ {𝑥}) = ((𝑤 “ {𝑥}) ∩ ((𝐴 × 𝐴) “ {𝑥}))
28 xpimasn 6086 . . . . . . . . . . . . . . . . . 18 (𝑥𝐴 → ((𝐴 × 𝐴) “ {𝑥}) = 𝐴)
2928ineq2d 4152 . . . . . . . . . . . . . . . . 17 (𝑥𝐴 → ((𝑤 “ {𝑥}) ∩ ((𝐴 × 𝐴) “ {𝑥})) = ((𝑤 “ {𝑥}) ∩ 𝐴))
3027, 29eqtrid 2792 . . . . . . . . . . . . . . . 16 (𝑥𝐴 → ((𝑤 ∩ (𝐴 × 𝐴)) “ {𝑥}) = ((𝑤 “ {𝑥}) ∩ 𝐴))
31 incom 4140 . . . . . . . . . . . . . . . 16 ((𝑤 “ {𝑥}) ∩ 𝐴) = (𝐴 ∩ (𝑤 “ {𝑥}))
3230, 31eqtrdi 2796 . . . . . . . . . . . . . . 15 (𝑥𝐴 → ((𝑤 ∩ (𝐴 × 𝐴)) “ {𝑥}) = (𝐴 ∩ (𝑤 “ {𝑥})))
3325, 32syl 17 . . . . . . . . . . . . . 14 ((((((((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) ∧ 𝑏 ∈ (unifTop‘(𝑈t (𝐴 × 𝐴)))) ∧ 𝑥𝑏) ∧ 𝑢 ∈ (𝑈t (𝐴 × 𝐴))) ∧ (𝑢 “ {𝑥}) ⊆ 𝑏) ∧ 𝑤𝑈) ∧ 𝑢 = (𝑤 ∩ (𝐴 × 𝐴))) ∧ 𝑡𝑈) ∧ (𝑡 “ {𝑥}) ⊆ 𝐴) → ((𝑤 ∩ (𝐴 × 𝐴)) “ {𝑥}) = (𝐴 ∩ (𝑤 “ {𝑥})))
3421, 33eqtrd 2780 . . . . . . . . . . . . 13 ((((((((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) ∧ 𝑏 ∈ (unifTop‘(𝑈t (𝐴 × 𝐴)))) ∧ 𝑥𝑏) ∧ 𝑢 ∈ (𝑈t (𝐴 × 𝐴))) ∧ (𝑢 “ {𝑥}) ⊆ 𝑏) ∧ 𝑤𝑈) ∧ 𝑢 = (𝑤 ∩ (𝐴 × 𝐴))) ∧ 𝑡𝑈) ∧ (𝑡 “ {𝑥}) ⊆ 𝐴) → (𝑢 “ {𝑥}) = (𝐴 ∩ (𝑤 “ {𝑥})))
3519, 34sseqtrrd 3967 . . . . . . . . . . . 12 ((((((((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) ∧ 𝑏 ∈ (unifTop‘(𝑈t (𝐴 × 𝐴)))) ∧ 𝑥𝑏) ∧ 𝑢 ∈ (𝑈t (𝐴 × 𝐴))) ∧ (𝑢 “ {𝑥}) ⊆ 𝑏) ∧ 𝑤𝑈) ∧ 𝑢 = (𝑤 ∩ (𝐴 × 𝐴))) ∧ 𝑡𝑈) ∧ (𝑡 “ {𝑥}) ⊆ 𝐴) → ((𝑡 “ {𝑥}) ∩ (𝑤 “ {𝑥})) ⊆ (𝑢 “ {𝑥}))
36 simp-5r 783 . . . . . . . . . . . 12 ((((((((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) ∧ 𝑏 ∈ (unifTop‘(𝑈t (𝐴 × 𝐴)))) ∧ 𝑥𝑏) ∧ 𝑢 ∈ (𝑈t (𝐴 × 𝐴))) ∧ (𝑢 “ {𝑥}) ⊆ 𝑏) ∧ 𝑤𝑈) ∧ 𝑢 = (𝑤 ∩ (𝐴 × 𝐴))) ∧ 𝑡𝑈) ∧ (𝑡 “ {𝑥}) ⊆ 𝐴) → (𝑢 “ {𝑥}) ⊆ 𝑏)
3735, 36sstrd 3936 . . . . . . . . . . 11 ((((((((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) ∧ 𝑏 ∈ (unifTop‘(𝑈t (𝐴 × 𝐴)))) ∧ 𝑥𝑏) ∧ 𝑢 ∈ (𝑈t (𝐴 × 𝐴))) ∧ (𝑢 “ {𝑥}) ⊆ 𝑏) ∧ 𝑤𝑈) ∧ 𝑢 = (𝑤 ∩ (𝐴 × 𝐴))) ∧ 𝑡𝑈) ∧ (𝑡 “ {𝑥}) ⊆ 𝐴) → ((𝑡 “ {𝑥}) ∩ (𝑤 “ {𝑥})) ⊆ 𝑏)
3817, 37sstrid 3937 . . . . . . . . . 10 ((((((((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) ∧ 𝑏 ∈ (unifTop‘(𝑈t (𝐴 × 𝐴)))) ∧ 𝑥𝑏) ∧ 𝑢 ∈ (𝑈t (𝐴 × 𝐴))) ∧ (𝑢 “ {𝑥}) ⊆ 𝑏) ∧ 𝑤𝑈) ∧ 𝑢 = (𝑤 ∩ (𝐴 × 𝐴))) ∧ 𝑡𝑈) ∧ (𝑡 “ {𝑥}) ⊆ 𝐴) → ((𝑡𝑤) “ {𝑥}) ⊆ 𝑏)
39 imaeq1 5962 . . . . . . . . . . . 12 (𝑣 = (𝑡𝑤) → (𝑣 “ {𝑥}) = ((𝑡𝑤) “ {𝑥}))
4039sseq1d 3957 . . . . . . . . . . 11 (𝑣 = (𝑡𝑤) → ((𝑣 “ {𝑥}) ⊆ 𝑏 ↔ ((𝑡𝑤) “ {𝑥}) ⊆ 𝑏))
4140rspcev 3561 . . . . . . . . . 10 (((𝑡𝑤) ∈ 𝑈 ∧ ((𝑡𝑤) “ {𝑥}) ⊆ 𝑏) → ∃𝑣𝑈 (𝑣 “ {𝑥}) ⊆ 𝑏)
4216, 38, 41syl2anc 584 . . . . . . . . 9 ((((((((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) ∧ 𝑏 ∈ (unifTop‘(𝑈t (𝐴 × 𝐴)))) ∧ 𝑥𝑏) ∧ 𝑢 ∈ (𝑈t (𝐴 × 𝐴))) ∧ (𝑢 “ {𝑥}) ⊆ 𝑏) ∧ 𝑤𝑈) ∧ 𝑢 = (𝑤 ∩ (𝐴 × 𝐴))) ∧ 𝑡𝑈) ∧ (𝑡 “ {𝑥}) ⊆ 𝐴) → ∃𝑣𝑈 (𝑣 “ {𝑥}) ⊆ 𝑏)
43 simp-4l 780 . . . . . . . . . . 11 ((((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) ∧ 𝑏 ∈ (unifTop‘(𝑈t (𝐴 × 𝐴)))) ∧ 𝑥𝑏) ∧ 𝑢 ∈ (𝑈t (𝐴 × 𝐴))) ∧ (𝑢 “ {𝑥}) ⊆ 𝑏) → (𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)))
4443ad2antrr 723 . . . . . . . . . 10 ((((((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) ∧ 𝑏 ∈ (unifTop‘(𝑈t (𝐴 × 𝐴)))) ∧ 𝑥𝑏) ∧ 𝑢 ∈ (𝑈t (𝐴 × 𝐴))) ∧ (𝑢 “ {𝑥}) ⊆ 𝑏) ∧ 𝑤𝑈) ∧ 𝑢 = (𝑤 ∩ (𝐴 × 𝐴))) → (𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)))
451simplbda 500 . . . . . . . . . . 11 ((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) → ∀𝑥𝐴𝑡𝑈 (𝑡 “ {𝑥}) ⊆ 𝐴)
4645r19.21bi 3135 . . . . . . . . . 10 (((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) ∧ 𝑥𝐴) → ∃𝑡𝑈 (𝑡 “ {𝑥}) ⊆ 𝐴)
4744, 24, 46syl2anc 584 . . . . . . . . 9 ((((((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) ∧ 𝑏 ∈ (unifTop‘(𝑈t (𝐴 × 𝐴)))) ∧ 𝑥𝑏) ∧ 𝑢 ∈ (𝑈t (𝐴 × 𝐴))) ∧ (𝑢 “ {𝑥}) ⊆ 𝑏) ∧ 𝑤𝑈) ∧ 𝑢 = (𝑤 ∩ (𝐴 × 𝐴))) → ∃𝑡𝑈 (𝑡 “ {𝑥}) ⊆ 𝐴)
4842, 47r19.29a 3220 . . . . . . . 8 ((((((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) ∧ 𝑏 ∈ (unifTop‘(𝑈t (𝐴 × 𝐴)))) ∧ 𝑥𝑏) ∧ 𝑢 ∈ (𝑈t (𝐴 × 𝐴))) ∧ (𝑢 “ {𝑥}) ⊆ 𝑏) ∧ 𝑤𝑈) ∧ 𝑢 = (𝑤 ∩ (𝐴 × 𝐴))) → ∃𝑣𝑈 (𝑣 “ {𝑥}) ⊆ 𝑏)
49 simplr 766 . . . . . . . . 9 ((((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) ∧ 𝑏 ∈ (unifTop‘(𝑈t (𝐴 × 𝐴)))) ∧ 𝑥𝑏) ∧ 𝑢 ∈ (𝑈t (𝐴 × 𝐴))) ∧ (𝑢 “ {𝑥}) ⊆ 𝑏) → 𝑢 ∈ (𝑈t (𝐴 × 𝐴)))
50 sqxpexg 7597 . . . . . . . . . . 11 (𝐴 ∈ (unifTop‘𝑈) → (𝐴 × 𝐴) ∈ V)
51 elrest 17128 . . . . . . . . . . 11 ((𝑈 ∈ (UnifOn‘𝑋) ∧ (𝐴 × 𝐴) ∈ V) → (𝑢 ∈ (𝑈t (𝐴 × 𝐴)) ↔ ∃𝑤𝑈 𝑢 = (𝑤 ∩ (𝐴 × 𝐴))))
5250, 51sylan2 593 . . . . . . . . . 10 ((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) → (𝑢 ∈ (𝑈t (𝐴 × 𝐴)) ↔ ∃𝑤𝑈 𝑢 = (𝑤 ∩ (𝐴 × 𝐴))))
5352biimpa 477 . . . . . . . . 9 (((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) ∧ 𝑢 ∈ (𝑈t (𝐴 × 𝐴))) → ∃𝑤𝑈 𝑢 = (𝑤 ∩ (𝐴 × 𝐴)))
5443, 49, 53syl2anc 584 . . . . . . . 8 ((((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) ∧ 𝑏 ∈ (unifTop‘(𝑈t (𝐴 × 𝐴)))) ∧ 𝑥𝑏) ∧ 𝑢 ∈ (𝑈t (𝐴 × 𝐴))) ∧ (𝑢 “ {𝑥}) ⊆ 𝑏) → ∃𝑤𝑈 𝑢 = (𝑤 ∩ (𝐴 × 𝐴)))
5548, 54r19.29a 3220 . . . . . . 7 ((((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) ∧ 𝑏 ∈ (unifTop‘(𝑈t (𝐴 × 𝐴)))) ∧ 𝑥𝑏) ∧ 𝑢 ∈ (𝑈t (𝐴 × 𝐴))) ∧ (𝑢 “ {𝑥}) ⊆ 𝑏) → ∃𝑣𝑈 (𝑣 “ {𝑥}) ⊆ 𝑏)
568simplbda 500 . . . . . . . 8 (((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) ∧ 𝑏 ∈ (unifTop‘(𝑈t (𝐴 × 𝐴)))) → ∀𝑥𝑏𝑢 ∈ (𝑈t (𝐴 × 𝐴))(𝑢 “ {𝑥}) ⊆ 𝑏)
5756r19.21bi 3135 . . . . . . 7 ((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) ∧ 𝑏 ∈ (unifTop‘(𝑈t (𝐴 × 𝐴)))) ∧ 𝑥𝑏) → ∃𝑢 ∈ (𝑈t (𝐴 × 𝐴))(𝑢 “ {𝑥}) ⊆ 𝑏)
5855, 57r19.29a 3220 . . . . . 6 ((((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) ∧ 𝑏 ∈ (unifTop‘(𝑈t (𝐴 × 𝐴)))) ∧ 𝑥𝑏) → ∃𝑣𝑈 (𝑣 “ {𝑥}) ⊆ 𝑏)
5958ralrimiva 3110 . . . . 5 (((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) ∧ 𝑏 ∈ (unifTop‘(𝑈t (𝐴 × 𝐴)))) → ∀𝑥𝑏𝑣𝑈 (𝑣 “ {𝑥}) ⊆ 𝑏)
60 elutop 23375 . . . . . 6 (𝑈 ∈ (UnifOn‘𝑋) → (𝑏 ∈ (unifTop‘𝑈) ↔ (𝑏𝑋 ∧ ∀𝑥𝑏𝑣𝑈 (𝑣 “ {𝑥}) ⊆ 𝑏)))
6160ad2antrr 723 . . . . 5 (((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) ∧ 𝑏 ∈ (unifTop‘(𝑈t (𝐴 × 𝐴)))) → (𝑏 ∈ (unifTop‘𝑈) ↔ (𝑏𝑋 ∧ ∀𝑥𝑏𝑣𝑈 (𝑣 “ {𝑥}) ⊆ 𝑏)))
6211, 59, 61mpbir2and 710 . . . 4 (((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) ∧ 𝑏 ∈ (unifTop‘(𝑈t (𝐴 × 𝐴)))) → 𝑏 ∈ (unifTop‘𝑈))
63 df-ss 3909 . . . . . 6 (𝑏𝐴 ↔ (𝑏𝐴) = 𝑏)
649, 63sylib 217 . . . . 5 (((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) ∧ 𝑏 ∈ (unifTop‘(𝑈t (𝐴 × 𝐴)))) → (𝑏𝐴) = 𝑏)
6564eqcomd 2746 . . . 4 (((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) ∧ 𝑏 ∈ (unifTop‘(𝑈t (𝐴 × 𝐴)))) → 𝑏 = (𝑏𝐴))
66 ineq1 4145 . . . . 5 (𝑎 = 𝑏 → (𝑎𝐴) = (𝑏𝐴))
6766rspceeqv 3576 . . . 4 ((𝑏 ∈ (unifTop‘𝑈) ∧ 𝑏 = (𝑏𝐴)) → ∃𝑎 ∈ (unifTop‘𝑈)𝑏 = (𝑎𝐴))
6862, 65, 67syl2anc 584 . . 3 (((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) ∧ 𝑏 ∈ (unifTop‘(𝑈t (𝐴 × 𝐴)))) → ∃𝑎 ∈ (unifTop‘𝑈)𝑏 = (𝑎𝐴))
69 fvex 6782 . . . . 5 (unifTop‘𝑈) ∈ V
70 elrest 17128 . . . . 5 (((unifTop‘𝑈) ∈ V ∧ 𝐴 ∈ (unifTop‘𝑈)) → (𝑏 ∈ ((unifTop‘𝑈) ↾t 𝐴) ↔ ∃𝑎 ∈ (unifTop‘𝑈)𝑏 = (𝑎𝐴)))
7169, 70mpan 687 . . . 4 (𝐴 ∈ (unifTop‘𝑈) → (𝑏 ∈ ((unifTop‘𝑈) ↾t 𝐴) ↔ ∃𝑎 ∈ (unifTop‘𝑈)𝑏 = (𝑎𝐴)))
7271ad2antlr 724 . . 3 (((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) ∧ 𝑏 ∈ (unifTop‘(𝑈t (𝐴 × 𝐴)))) → (𝑏 ∈ ((unifTop‘𝑈) ↾t 𝐴) ↔ ∃𝑎 ∈ (unifTop‘𝑈)𝑏 = (𝑎𝐴)))
7368, 72mpbird 256 . 2 (((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) ∧ 𝑏 ∈ (unifTop‘(𝑈t (𝐴 × 𝐴)))) → 𝑏 ∈ ((unifTop‘𝑈) ↾t 𝐴))
744, 73eqelssd 3947 1 ((𝑈 ∈ (UnifOn‘𝑋) ∧ 𝐴 ∈ (unifTop‘𝑈)) → ((unifTop‘𝑈) ↾t 𝐴) = (unifTop‘(𝑈t (𝐴 × 𝐴))))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 205  wa 396   = wceq 1542  wcel 2110  wral 3066  wrex 3067  Vcvv 3431  cin 3891  wss 3892  {csn 4567   × cxp 5587  cima 5592  cfv 6431  (class class class)co 7269  t crest 17121  UnifOncust 23341  unifTopcutop 23372
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1802  ax-4 1816  ax-5 1917  ax-6 1975  ax-7 2015  ax-8 2112  ax-9 2120  ax-10 2141  ax-11 2158  ax-12 2175  ax-ext 2711  ax-rep 5214  ax-sep 5227  ax-nul 5234  ax-pow 5292  ax-pr 5356  ax-un 7580
This theorem depends on definitions:  df-bi 206  df-an 397  df-or 845  df-3an 1088  df-tru 1545  df-fal 1555  df-ex 1787  df-nf 1791  df-sb 2072  df-mo 2542  df-eu 2571  df-clab 2718  df-cleq 2732  df-clel 2818  df-nfc 2891  df-ne 2946  df-ral 3071  df-rex 3072  df-reu 3073  df-rab 3075  df-v 3433  df-sbc 3721  df-csb 3838  df-dif 3895  df-un 3897  df-in 3899  df-ss 3909  df-nul 4263  df-if 4466  df-pw 4541  df-sn 4568  df-pr 4570  df-op 4574  df-uni 4846  df-iun 4932  df-br 5080  df-opab 5142  df-mpt 5163  df-id 5489  df-xp 5595  df-rel 5596  df-cnv 5597  df-co 5598  df-dm 5599  df-rn 5600  df-res 5601  df-ima 5602  df-iota 6389  df-fun 6433  df-fn 6434  df-f 6435  df-f1 6436  df-fo 6437  df-f1o 6438  df-fv 6439  df-ov 7272  df-oprab 7273  df-mpo 7274  df-1st 7818  df-2nd 7819  df-rest 17123  df-ust 23342  df-utop 23373
This theorem is referenced by:  ressusp  23406
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