Theorem ressusp 22069

Description: The restriction of a uniform topological space to an open set is a uniform space. (Contributed by Thierry Arnoux, 16-Dec-2017.)

Hypotheses

Ref	Expression
ressusp.1	⊢ 𝐵 = (Base‘𝑊)
ressusp.2	⊢ 𝐽 = (TopOpen‘𝑊)

Assertion

Ref	Expression
ressusp	⊢ ((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝐴 ∈ 𝐽) → (𝑊 ↾s 𝐴) ∈ UnifSp)

Proof of Theorem ressusp

Step	Hyp	Ref	Expression
1		ressuss 22067	. . . . 5 ⊢ (𝐴 ∈ 𝐽 → (UnifSt‘(𝑊 ↾s 𝐴)) = ((UnifSt‘𝑊) ↾t (𝐴 × 𝐴)))
2	1	3ad2ant3 1084	. . . 4 ⊢ ((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝐴 ∈ 𝐽) → (UnifSt‘(𝑊 ↾s 𝐴)) = ((UnifSt‘𝑊) ↾t (𝐴 × 𝐴)))
3		simp1 1061	. . . . . . 7 ⊢ ((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝐴 ∈ 𝐽) → 𝑊 ∈ UnifSp)
4		ressusp.1	. . . . . . . 8 ⊢ 𝐵 = (Base‘𝑊)
5		eqid 2622	. . . . . . . 8 ⊢ (UnifSt‘𝑊) = (UnifSt‘𝑊)
6		ressusp.2	. . . . . . . 8 ⊢ 𝐽 = (TopOpen‘𝑊)
7	4, 5, 6	isusp 22065	. . . . . . 7 ⊢ (𝑊 ∈ UnifSp ↔ ((UnifSt‘𝑊) ∈ (UnifOn‘𝐵) ∧ 𝐽 = (unifTop‘(UnifSt‘𝑊))))
8	3, 7	sylib 208	. . . . . 6 ⊢ ((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝐴 ∈ 𝐽) → ((UnifSt‘𝑊) ∈ (UnifOn‘𝐵) ∧ 𝐽 = (unifTop‘(UnifSt‘𝑊))))
9	8	simpld 475	. . . . 5 ⊢ ((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝐴 ∈ 𝐽) → (UnifSt‘𝑊) ∈ (UnifOn‘𝐵))
10		simp2 1062	. . . . . . 7 ⊢ ((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝐴 ∈ 𝐽) → 𝑊 ∈ TopSp)
11	4, 6	istps 20738	. . . . . . 7 ⊢ (𝑊 ∈ TopSp ↔ 𝐽 ∈ (TopOn‘𝐵))
12	10, 11	sylib 208	. . . . . 6 ⊢ ((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝐴 ∈ 𝐽) → 𝐽 ∈ (TopOn‘𝐵))
13		simp3 1063	. . . . . 6 ⊢ ((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝐴 ∈ 𝐽) → 𝐴 ∈ 𝐽)
14		toponss 20731	. . . . . 6 ⊢ ((𝐽 ∈ (TopOn‘𝐵) ∧ 𝐴 ∈ 𝐽) → 𝐴 ⊆ 𝐵)
15	12, 13, 14	syl2anc 693	. . . . 5 ⊢ ((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝐴 ∈ 𝐽) → 𝐴 ⊆ 𝐵)
16		trust 22033	. . . . 5 ⊢ (((UnifSt‘𝑊) ∈ (UnifOn‘𝐵) ∧ 𝐴 ⊆ 𝐵) → ((UnifSt‘𝑊) ↾t (𝐴 × 𝐴)) ∈ (UnifOn‘𝐴))
17	9, 15, 16	syl2anc 693	. . . 4 ⊢ ((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝐴 ∈ 𝐽) → ((UnifSt‘𝑊) ↾t (𝐴 × 𝐴)) ∈ (UnifOn‘𝐴))
18	2, 17	eqeltrd 2701	. . 3 ⊢ ((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝐴 ∈ 𝐽) → (UnifSt‘(𝑊 ↾s 𝐴)) ∈ (UnifOn‘𝐴))
19		eqid 2622	. . . . . 6 ⊢ (𝑊 ↾s 𝐴) = (𝑊 ↾s 𝐴)
20	19, 4	ressbas2 15931	. . . . 5 ⊢ (𝐴 ⊆ 𝐵 → 𝐴 = (Base‘(𝑊 ↾s 𝐴)))
21	15, 20	syl 17	. . . 4 ⊢ ((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝐴 ∈ 𝐽) → 𝐴 = (Base‘(𝑊 ↾s 𝐴)))
22	21	fveq2d 6195	. . 3 ⊢ ((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝐴 ∈ 𝐽) → (UnifOn‘𝐴) = (UnifOn‘(Base‘(𝑊 ↾s 𝐴))))
23	18, 22	eleqtrd 2703	. 2 ⊢ ((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝐴 ∈ 𝐽) → (UnifSt‘(𝑊 ↾s 𝐴)) ∈ (UnifOn‘(Base‘(𝑊 ↾s 𝐴))))
24	8	simprd 479	. . . . 5 ⊢ ((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝐴 ∈ 𝐽) → 𝐽 = (unifTop‘(UnifSt‘𝑊)))
25	13, 24	eleqtrd 2703	. . . 4 ⊢ ((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝐴 ∈ 𝐽) → 𝐴 ∈ (unifTop‘(UnifSt‘𝑊)))
26		restutopopn 22042	. . . 4 ⊢ (((UnifSt‘𝑊) ∈ (UnifOn‘𝐵) ∧ 𝐴 ∈ (unifTop‘(UnifSt‘𝑊))) → ((unifTop‘(UnifSt‘𝑊)) ↾t 𝐴) = (unifTop‘((UnifSt‘𝑊) ↾t (𝐴 × 𝐴))))
27	9, 25, 26	syl2anc 693	. . 3 ⊢ ((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝐴 ∈ 𝐽) → ((unifTop‘(UnifSt‘𝑊)) ↾t 𝐴) = (unifTop‘((UnifSt‘𝑊) ↾t (𝐴 × 𝐴))))
28	24	oveq1d 6665	. . 3 ⊢ ((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝐴 ∈ 𝐽) → (𝐽 ↾t 𝐴) = ((unifTop‘(UnifSt‘𝑊)) ↾t 𝐴))
29	2	fveq2d 6195	. . 3 ⊢ ((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝐴 ∈ 𝐽) → (unifTop‘(UnifSt‘(𝑊 ↾s 𝐴))) = (unifTop‘((UnifSt‘𝑊) ↾t (𝐴 × 𝐴))))
30	27, 28, 29	3eqtr4d 2666	. 2 ⊢ ((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝐴 ∈ 𝐽) → (𝐽 ↾t 𝐴) = (unifTop‘(UnifSt‘(𝑊 ↾s 𝐴))))
31		eqid 2622	. . 3 ⊢ (Base‘(𝑊 ↾s 𝐴)) = (Base‘(𝑊 ↾s 𝐴))
32		eqid 2622	. . 3 ⊢ (UnifSt‘(𝑊 ↾s 𝐴)) = (UnifSt‘(𝑊 ↾s 𝐴))
33	19, 6	resstopn 20990	. . 3 ⊢ (𝐽 ↾t 𝐴) = (TopOpen‘(𝑊 ↾s 𝐴))
34	31, 32, 33	isusp 22065	. 2 ⊢ ((𝑊 ↾s 𝐴) ∈ UnifSp ↔ ((UnifSt‘(𝑊 ↾s 𝐴)) ∈ (UnifOn‘(Base‘(𝑊 ↾s 𝐴))) ∧ (𝐽 ↾t 𝐴) = (unifTop‘(UnifSt‘(𝑊 ↾s 𝐴)))))
35	23, 30, 34	sylanbrc 698	1 ⊢ ((𝑊 ∈ UnifSp ∧ 𝑊 ∈ TopSp ∧ 𝐴 ∈ 𝐽) → (𝑊 ↾s 𝐴) ∈ UnifSp)

Syntax hints:   → wi 4   ∧ wa 384   ∧ w3a 1037   = wceq 1483   ∈ wcel 1990   ⊆ wss 3574   × cxp 5112  ‘cfv 5888  (class class class)co 6650  Basecbs 15857   ↾_s cress 15858   ↾_t crest 16081  TopOpenctopn 16082  TopOnctopon 20715  TopSpctps 20736  UnifOncust 22003  unifTopcutop 22034  UnifStcuss 22057  UnifSpcusp 22058

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-8 1992  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-rep 4771  ax-sep 4781  ax-nul 4789  ax-pow 4843  ax-pr 4906  ax-un 6949  ax-cnex 9992  ax-resscn 9993  ax-1cn 9994  ax-icn 9995  ax-addcl 9996  ax-addrcl 9997  ax-mulcl 9998  ax-mulrcl 9999  ax-mulcom 10000  ax-addass 10001  ax-mulass 10002  ax-distr 10003  ax-i2m1 10004  ax-1ne0 10005  ax-1rid 10006  ax-rnegex 10007  ax-rrecex 10008  ax-cnre 10009  ax-pre-lttri 10010  ax-pre-lttrn 10011  ax-pre-ltadd 10012  ax-pre-mulgt0 10013

This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3or 1038  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ne 2795  df-nel 2898  df-ral 2917  df-rex 2918  df-reu 2919  df-rab 2921  df-v 3202  df-sbc 3436  df-csb 3534  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-pss 3590  df-nul 3916  df-if 4087  df-pw 4160  df-sn 4178  df-pr 4180  df-tp 4182  df-op 4184  df-uni 4437  df-iun 4522  df-br 4654  df-opab 4713  df-mpt 4730  df-tr 4753  df-id 5024  df-eprel 5029  df-po 5035  df-so 5036  df-fr 5073  df-we 5075  df-xp 5120  df-rel 5121  df-cnv 5122  df-co 5123  df-dm 5124  df-rn 5125  df-res 5126  df-ima 5127  df-pred 5680  df-ord 5726  df-on 5727  df-lim 5728  df-suc 5729  df-iota 5851  df-fun 5890  df-fn 5891  df-f 5892  df-f1 5893  df-fo 5894  df-f1o 5895  df-fv 5896  df-riota 6611  df-ov 6653  df-oprab 6654  df-mpt2 6655  df-om 7066  df-1st 7168  df-2nd 7169  df-wrecs 7407  df-recs 7468  df-rdg 7506  df-er 7742  df-en 7956  df-dom 7957  df-sdom 7958  df-pnf 10076  df-mnf 10077  df-xr 10078  df-ltxr 10079  df-le 10080  df-sub 10268  df-neg 10269  df-nn 11021  df-2 11079  df-3 11080  df-4 11081  df-5 11082  df-6 11083  df-7 11084  df-8 11085  df-9 11086  df-n0 11293  df-z 11378  df-dec 11494  df-ndx 15860  df-slot 15861  df-base 15863  df-sets 15864  df-ress 15865  df-tset 15960  df-unif 15965  df-rest 16083  df-topn 16084  df-top 20699  df-topon 20716  df-topsp 20737  df-ust 22004  df-utop 22035  df-uss 22060  df-usp 22061

This theorem is referenced by: (None)