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Theorem nrginvrcn 24209

Description: The ring inverse function is continuous in a normed ring. (Note that this is true even in rings which are not division rings.) (Contributed by Mario Carneiro, 6-Oct-2015.)

**Hypotheses**
Ref	Expression
nrginvrcn.x	⊢ 𝑋 = (Base‘𝑅)
nrginvrcn.u	⊢ 𝑈 = (Unit‘𝑅)
nrginvrcn.i	⊢ 𝐼 = (inv_r‘𝑅)
nrginvrcn.j	⊢ 𝐽 = (TopOpen‘𝑅)

**Assertion**
Ref	Expression
nrginvrcn	⊢ (𝑅 ∈ NrmRing → 𝐼 ∈ ((𝐽 ↾_t 𝑈) Cn (𝐽 ↾_t 𝑈)))

Proof of Theorem nrginvrcn Dummy variables 𝑠 𝑟 𝑥 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		nrgring 24180	. . . 4 ⊢ (𝑅 ∈ NrmRing → 𝑅 ∈ Ring)
2		nrginvrcn.u	. . . . 5 ⊢ 𝑈 = (Unit‘𝑅)
3		eqid 2733	. . . . 5 ⊢ ((mulGrp‘𝑅) ↾_s 𝑈) = ((mulGrp‘𝑅) ↾_s 𝑈)
4	2, 3	unitgrp 20197	. . . 4 ⊢ (𝑅 ∈ Ring → ((mulGrp‘𝑅) ↾_s 𝑈) ∈ Grp)
5	2, 3	unitgrpbas 20196	. . . . 5 ⊢ 𝑈 = (Base‘((mulGrp‘𝑅) ↾_s 𝑈))
6		nrginvrcn.i	. . . . . 6 ⊢ 𝐼 = (inv_r‘𝑅)
7	2, 3, 6	invrfval 20203	. . . . 5 ⊢ 𝐼 = (inv_g‘((mulGrp‘𝑅) ↾_s 𝑈))
8	5, 7	grpinvf 18871	. . . 4 ⊢ (((mulGrp‘𝑅) ↾_s 𝑈) ∈ Grp → 𝐼:𝑈⟶𝑈)
9	1, 4, 8	3syl 18	. . 3 ⊢ (𝑅 ∈ NrmRing → 𝐼:𝑈⟶𝑈)
10		1rp 12978	. . . . . . . 8 ⊢ 1 ∈ ℝ⁺
11	10	ne0ii 4338	. . . . . . 7 ⊢ ℝ⁺ ≠ ∅
12	1	ad2antrr 725	. . . . . . . . . . . . . 14 ⊢ (((𝑅 ∈ NrmRing ∧ (𝑥 ∈ 𝑈 ∧ 𝑟 ∈ ℝ⁺)) ∧ 𝑦 ∈ 𝑈) → 𝑅 ∈ Ring)
13		nrginvrcn.x	. . . . . . . . . . . . . . . 16 ⊢ 𝑋 = (Base‘𝑅)
14	13, 2	unitss 20190	. . . . . . . . . . . . . . 15 ⊢ 𝑈 ⊆ 𝑋
15		simplrl 776	. . . . . . . . . . . . . . 15 ⊢ (((𝑅 ∈ NrmRing ∧ (𝑥 ∈ 𝑈 ∧ 𝑟 ∈ ℝ⁺)) ∧ 𝑦 ∈ 𝑈) → 𝑥 ∈ 𝑈)
16	14, 15	sselid 3981	. . . . . . . . . . . . . 14 ⊢ (((𝑅 ∈ NrmRing ∧ (𝑥 ∈ 𝑈 ∧ 𝑟 ∈ ℝ⁺)) ∧ 𝑦 ∈ 𝑈) → 𝑥 ∈ 𝑋)
17		simpr 486	. . . . . . . . . . . . . . 15 ⊢ (((𝑅 ∈ NrmRing ∧ (𝑥 ∈ 𝑈 ∧ 𝑟 ∈ ℝ⁺)) ∧ 𝑦 ∈ 𝑈) → 𝑦 ∈ 𝑈)
18	14, 17	sselid 3981	. . . . . . . . . . . . . 14 ⊢ (((𝑅 ∈ NrmRing ∧ (𝑥 ∈ 𝑈 ∧ 𝑟 ∈ ℝ⁺)) ∧ 𝑦 ∈ 𝑈) → 𝑦 ∈ 𝑋)
19		eqid 2733	. . . . . . . . . . . . . . 15 ⊢ (1_r‘𝑅) = (1_r‘𝑅)
20		eqid 2733	. . . . . . . . . . . . . . 15 ⊢ (0_g‘𝑅) = (0_g‘𝑅)
21	13, 19, 20	ring1eq0 20110	. . . . . . . . . . . . . 14 ⊢ ((𝑅 ∈ Ring ∧ 𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋) → ((1_r‘𝑅) = (0_g‘𝑅) → 𝑥 = 𝑦))
22	12, 16, 18, 21	syl3anc 1372	. . . . . . . . . . . . 13 ⊢ (((𝑅 ∈ NrmRing ∧ (𝑥 ∈ 𝑈 ∧ 𝑟 ∈ ℝ⁺)) ∧ 𝑦 ∈ 𝑈) → ((1_r‘𝑅) = (0_g‘𝑅) → 𝑥 = 𝑦))
23		eqid 2733	. . . . . . . . . . . . . . . 16 ⊢ (𝐼‘𝑦) = (𝐼‘𝑦)
24		nrgngp 24179	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑅 ∈ NrmRing → 𝑅 ∈ NrmGrp)
25		ngpms 24109	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑅 ∈ NrmGrp → 𝑅 ∈ MetSp)
26		msxms 23960	. . . . . . . . . . . . . . . . . . 19 ⊢ (𝑅 ∈ MetSp → 𝑅 ∈ ∞MetSp)
27	24, 25, 26	3syl 18	. . . . . . . . . . . . . . . . . 18 ⊢ (𝑅 ∈ NrmRing → 𝑅 ∈ ∞MetSp)
28	27	ad2antrr 725	. . . . . . . . . . . . . . . . 17 ⊢ (((𝑅 ∈ NrmRing ∧ (𝑥 ∈ 𝑈 ∧ 𝑟 ∈ ℝ⁺)) ∧ 𝑦 ∈ 𝑈) → 𝑅 ∈ ∞MetSp)
29	9	adantr 482	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝑅 ∈ NrmRing ∧ (𝑥 ∈ 𝑈 ∧ 𝑟 ∈ ℝ⁺)) → 𝐼:𝑈⟶𝑈)
30	29	ffvelcdmda 7087	. . . . . . . . . . . . . . . . . 18 ⊢ (((𝑅 ∈ NrmRing ∧ (𝑥 ∈ 𝑈 ∧ 𝑟 ∈ ℝ⁺)) ∧ 𝑦 ∈ 𝑈) → (𝐼‘𝑦) ∈ 𝑈)
31	14, 30	sselid 3981	. . . . . . . . . . . . . . . . 17 ⊢ (((𝑅 ∈ NrmRing ∧ (𝑥 ∈ 𝑈 ∧ 𝑟 ∈ ℝ⁺)) ∧ 𝑦 ∈ 𝑈) → (𝐼‘𝑦) ∈ 𝑋)
32		eqid 2733	. . . . . . . . . . . . . . . . . 18 ⊢ (dist‘𝑅) = (dist‘𝑅)
33	13, 32	xmseq0 23970	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑅 ∈ ∞MetSp ∧ (𝐼‘𝑦) ∈ 𝑋 ∧ (𝐼‘𝑦) ∈ 𝑋) → (((𝐼‘𝑦)(dist‘𝑅)(𝐼‘𝑦)) = 0 ↔ (𝐼‘𝑦) = (𝐼‘𝑦)))
34	28, 31, 31, 33	syl3anc 1372	. . . . . . . . . . . . . . . 16 ⊢ (((𝑅 ∈ NrmRing ∧ (𝑥 ∈ 𝑈 ∧ 𝑟 ∈ ℝ⁺)) ∧ 𝑦 ∈ 𝑈) → (((𝐼‘𝑦)(dist‘𝑅)(𝐼‘𝑦)) = 0 ↔ (𝐼‘𝑦) = (𝐼‘𝑦)))
35	23, 34	mpbiri 258	. . . . . . . . . . . . . . 15 ⊢ (((𝑅 ∈ NrmRing ∧ (𝑥 ∈ 𝑈 ∧ 𝑟 ∈ ℝ⁺)) ∧ 𝑦 ∈ 𝑈) → ((𝐼‘𝑦)(dist‘𝑅)(𝐼‘𝑦)) = 0)
36		simplrr 777	. . . . . . . . . . . . . . . 16 ⊢ (((𝑅 ∈ NrmRing ∧ (𝑥 ∈ 𝑈 ∧ 𝑟 ∈ ℝ⁺)) ∧ 𝑦 ∈ 𝑈) → 𝑟 ∈ ℝ⁺)
37	36	rpgt0d 13019	. . . . . . . . . . . . . . 15 ⊢ (((𝑅 ∈ NrmRing ∧ (𝑥 ∈ 𝑈 ∧ 𝑟 ∈ ℝ⁺)) ∧ 𝑦 ∈ 𝑈) → 0 < 𝑟)
38	35, 37	eqbrtrd 5171	. . . . . . . . . . . . . 14 ⊢ (((𝑅 ∈ NrmRing ∧ (𝑥 ∈ 𝑈 ∧ 𝑟 ∈ ℝ⁺)) ∧ 𝑦 ∈ 𝑈) → ((𝐼‘𝑦)(dist‘𝑅)(𝐼‘𝑦)) < 𝑟)
39		fveq2 6892	. . . . . . . . . . . . . . . 16 ⊢ (𝑥 = 𝑦 → (𝐼‘𝑥) = (𝐼‘𝑦))
40	39	oveq1d 7424	. . . . . . . . . . . . . . 15 ⊢ (𝑥 = 𝑦 → ((𝐼‘𝑥)(dist‘𝑅)(𝐼‘𝑦)) = ((𝐼‘𝑦)(dist‘𝑅)(𝐼‘𝑦)))
41	40	breq1d 5159	. . . . . . . . . . . . . 14 ⊢ (𝑥 = 𝑦 → (((𝐼‘𝑥)(dist‘𝑅)(𝐼‘𝑦)) < 𝑟 ↔ ((𝐼‘𝑦)(dist‘𝑅)(𝐼‘𝑦)) < 𝑟))
42	38, 41	syl5ibrcom 246	. . . . . . . . . . . . 13 ⊢ (((𝑅 ∈ NrmRing ∧ (𝑥 ∈ 𝑈 ∧ 𝑟 ∈ ℝ⁺)) ∧ 𝑦 ∈ 𝑈) → (𝑥 = 𝑦 → ((𝐼‘𝑥)(dist‘𝑅)(𝐼‘𝑦)) < 𝑟))
43	22, 42	syld 47	. . . . . . . . . . . 12 ⊢ (((𝑅 ∈ NrmRing ∧ (𝑥 ∈ 𝑈 ∧ 𝑟 ∈ ℝ⁺)) ∧ 𝑦 ∈ 𝑈) → ((1_r‘𝑅) = (0_g‘𝑅) → ((𝐼‘𝑥)(dist‘𝑅)(𝐼‘𝑦)) < 𝑟))
44	43	imp 408	. . . . . . . . . . 11 ⊢ ((((𝑅 ∈ NrmRing ∧ (𝑥 ∈ 𝑈 ∧ 𝑟 ∈ ℝ⁺)) ∧ 𝑦 ∈ 𝑈) ∧ (1_r‘𝑅) = (0_g‘𝑅)) → ((𝐼‘𝑥)(dist‘𝑅)(𝐼‘𝑦)) < 𝑟)
45	44	an32s 651	. . . . . . . . . 10 ⊢ ((((𝑅 ∈ NrmRing ∧ (𝑥 ∈ 𝑈 ∧ 𝑟 ∈ ℝ⁺)) ∧ (1_r‘𝑅) = (0_g‘𝑅)) ∧ 𝑦 ∈ 𝑈) → ((𝐼‘𝑥)(dist‘𝑅)(𝐼‘𝑦)) < 𝑟)
46	45	a1d 25	. . . . . . . . 9 ⊢ ((((𝑅 ∈ NrmRing ∧ (𝑥 ∈ 𝑈 ∧ 𝑟 ∈ ℝ⁺)) ∧ (1_r‘𝑅) = (0_g‘𝑅)) ∧ 𝑦 ∈ 𝑈) → ((𝑥(dist‘𝑅)𝑦) < 𝑠 → ((𝐼‘𝑥)(dist‘𝑅)(𝐼‘𝑦)) < 𝑟))
47	46	ralrimiva 3147	. . . . . . . 8 ⊢ (((𝑅 ∈ NrmRing ∧ (𝑥 ∈ 𝑈 ∧ 𝑟 ∈ ℝ⁺)) ∧ (1_r‘𝑅) = (0_g‘𝑅)) → ∀𝑦 ∈ 𝑈 ((𝑥(dist‘𝑅)𝑦) < 𝑠 → ((𝐼‘𝑥)(dist‘𝑅)(𝐼‘𝑦)) < 𝑟))
48	47	ralrimivw 3151	. . . . . . 7 ⊢ (((𝑅 ∈ NrmRing ∧ (𝑥 ∈ 𝑈 ∧ 𝑟 ∈ ℝ⁺)) ∧ (1_r‘𝑅) = (0_g‘𝑅)) → ∀𝑠 ∈ ℝ⁺ ∀𝑦 ∈ 𝑈 ((𝑥(dist‘𝑅)𝑦) < 𝑠 → ((𝐼‘𝑥)(dist‘𝑅)(𝐼‘𝑦)) < 𝑟))
49		r19.2z 4495	. . . . . . 7 ⊢ ((ℝ⁺ ≠ ∅ ∧ ∀𝑠 ∈ ℝ⁺ ∀𝑦 ∈ 𝑈 ((𝑥(dist‘𝑅)𝑦) < 𝑠 → ((𝐼‘𝑥)(dist‘𝑅)(𝐼‘𝑦)) < 𝑟)) → ∃𝑠 ∈ ℝ⁺ ∀𝑦 ∈ 𝑈 ((𝑥(dist‘𝑅)𝑦) < 𝑠 → ((𝐼‘𝑥)(dist‘𝑅)(𝐼‘𝑦)) < 𝑟))
50	11, 48, 49	sylancr 588	. . . . . 6 ⊢ (((𝑅 ∈ NrmRing ∧ (𝑥 ∈ 𝑈 ∧ 𝑟 ∈ ℝ⁺)) ∧ (1_r‘𝑅) = (0_g‘𝑅)) → ∃𝑠 ∈ ℝ⁺ ∀𝑦 ∈ 𝑈 ((𝑥(dist‘𝑅)𝑦) < 𝑠 → ((𝐼‘𝑥)(dist‘𝑅)(𝐼‘𝑦)) < 𝑟))
51		eqid 2733	. . . . . . 7 ⊢ (norm‘𝑅) = (norm‘𝑅)
52		simpll 766	. . . . . . 7 ⊢ (((𝑅 ∈ NrmRing ∧ (𝑥 ∈ 𝑈 ∧ 𝑟 ∈ ℝ⁺)) ∧ (1_r‘𝑅) ≠ (0_g‘𝑅)) → 𝑅 ∈ NrmRing)
53	1	ad2antrr 725	. . . . . . . 8 ⊢ (((𝑅 ∈ NrmRing ∧ (𝑥 ∈ 𝑈 ∧ 𝑟 ∈ ℝ⁺)) ∧ (1_r‘𝑅) ≠ (0_g‘𝑅)) → 𝑅 ∈ Ring)
54		simpr 486	. . . . . . . 8 ⊢ (((𝑅 ∈ NrmRing ∧ (𝑥 ∈ 𝑈 ∧ 𝑟 ∈ ℝ⁺)) ∧ (1_r‘𝑅) ≠ (0_g‘𝑅)) → (1_r‘𝑅) ≠ (0_g‘𝑅))
55	19, 20	isnzr 20293	. . . . . . . 8 ⊢ (𝑅 ∈ NzRing ↔ (𝑅 ∈ Ring ∧ (1_r‘𝑅) ≠ (0_g‘𝑅)))
56	53, 54, 55	sylanbrc 584	. . . . . . 7 ⊢ (((𝑅 ∈ NrmRing ∧ (𝑥 ∈ 𝑈 ∧ 𝑟 ∈ ℝ⁺)) ∧ (1_r‘𝑅) ≠ (0_g‘𝑅)) → 𝑅 ∈ NzRing)
57		simplrl 776	. . . . . . 7 ⊢ (((𝑅 ∈ NrmRing ∧ (𝑥 ∈ 𝑈 ∧ 𝑟 ∈ ℝ⁺)) ∧ (1_r‘𝑅) ≠ (0_g‘𝑅)) → 𝑥 ∈ 𝑈)
58		simplrr 777	. . . . . . 7 ⊢ (((𝑅 ∈ NrmRing ∧ (𝑥 ∈ 𝑈 ∧ 𝑟 ∈ ℝ⁺)) ∧ (1_r‘𝑅) ≠ (0_g‘𝑅)) → 𝑟 ∈ ℝ⁺)
59		eqid 2733	. . . . . . 7 ⊢ (if(1 ≤ (((norm‘𝑅)‘𝑥) · 𝑟), 1, (((norm‘𝑅)‘𝑥) · 𝑟)) · (((norm‘𝑅)‘𝑥) / 2)) = (if(1 ≤ (((norm‘𝑅)‘𝑥) · 𝑟), 1, (((norm‘𝑅)‘𝑥) · 𝑟)) · (((norm‘𝑅)‘𝑥) / 2))
60	13, 2, 6, 51, 32, 52, 56, 57, 58, 59	nrginvrcnlem 24208	. . . . . 6 ⊢ (((𝑅 ∈ NrmRing ∧ (𝑥 ∈ 𝑈 ∧ 𝑟 ∈ ℝ⁺)) ∧ (1_r‘𝑅) ≠ (0_g‘𝑅)) → ∃𝑠 ∈ ℝ⁺ ∀𝑦 ∈ 𝑈 ((𝑥(dist‘𝑅)𝑦) < 𝑠 → ((𝐼‘𝑥)(dist‘𝑅)(𝐼‘𝑦)) < 𝑟))
61	50, 60	pm2.61dane 3030	. . . . 5 ⊢ ((𝑅 ∈ NrmRing ∧ (𝑥 ∈ 𝑈 ∧ 𝑟 ∈ ℝ⁺)) → ∃𝑠 ∈ ℝ⁺ ∀𝑦 ∈ 𝑈 ((𝑥(dist‘𝑅)𝑦) < 𝑠 → ((𝐼‘𝑥)(dist‘𝑅)(𝐼‘𝑦)) < 𝑟))
62	15, 17	ovresd 7574	. . . . . . . . 9 ⊢ (((𝑅 ∈ NrmRing ∧ (𝑥 ∈ 𝑈 ∧ 𝑟 ∈ ℝ⁺)) ∧ 𝑦 ∈ 𝑈) → (𝑥((dist‘𝑅) ↾ (𝑈 × 𝑈))𝑦) = (𝑥(dist‘𝑅)𝑦))
63	62	breq1d 5159	. . . . . . . 8 ⊢ (((𝑅 ∈ NrmRing ∧ (𝑥 ∈ 𝑈 ∧ 𝑟 ∈ ℝ⁺)) ∧ 𝑦 ∈ 𝑈) → ((𝑥((dist‘𝑅) ↾ (𝑈 × 𝑈))𝑦) < 𝑠 ↔ (𝑥(dist‘𝑅)𝑦) < 𝑠))
64		simpl 484	. . . . . . . . . . . 12 ⊢ ((𝑥 ∈ 𝑈 ∧ 𝑟 ∈ ℝ⁺) → 𝑥 ∈ 𝑈)
65		ffvelcdm 7084	. . . . . . . . . . . 12 ⊢ ((𝐼:𝑈⟶𝑈 ∧ 𝑥 ∈ 𝑈) → (𝐼‘𝑥) ∈ 𝑈)
66	9, 64, 65	syl2an 597	. . . . . . . . . . 11 ⊢ ((𝑅 ∈ NrmRing ∧ (𝑥 ∈ 𝑈 ∧ 𝑟 ∈ ℝ⁺)) → (𝐼‘𝑥) ∈ 𝑈)
67	66	adantr 482	. . . . . . . . . 10 ⊢ (((𝑅 ∈ NrmRing ∧ (𝑥 ∈ 𝑈 ∧ 𝑟 ∈ ℝ⁺)) ∧ 𝑦 ∈ 𝑈) → (𝐼‘𝑥) ∈ 𝑈)
68	67, 30	ovresd 7574	. . . . . . . . 9 ⊢ (((𝑅 ∈ NrmRing ∧ (𝑥 ∈ 𝑈 ∧ 𝑟 ∈ ℝ⁺)) ∧ 𝑦 ∈ 𝑈) → ((𝐼‘𝑥)((dist‘𝑅) ↾ (𝑈 × 𝑈))(𝐼‘𝑦)) = ((𝐼‘𝑥)(dist‘𝑅)(𝐼‘𝑦)))
69	68	breq1d 5159	. . . . . . . 8 ⊢ (((𝑅 ∈ NrmRing ∧ (𝑥 ∈ 𝑈 ∧ 𝑟 ∈ ℝ⁺)) ∧ 𝑦 ∈ 𝑈) → (((𝐼‘𝑥)((dist‘𝑅) ↾ (𝑈 × 𝑈))(𝐼‘𝑦)) < 𝑟 ↔ ((𝐼‘𝑥)(dist‘𝑅)(𝐼‘𝑦)) < 𝑟))
70	63, 69	imbi12d 345	. . . . . . 7 ⊢ (((𝑅 ∈ NrmRing ∧ (𝑥 ∈ 𝑈 ∧ 𝑟 ∈ ℝ⁺)) ∧ 𝑦 ∈ 𝑈) → (((𝑥((dist‘𝑅) ↾ (𝑈 × 𝑈))𝑦) < 𝑠 → ((𝐼‘𝑥)((dist‘𝑅) ↾ (𝑈 × 𝑈))(𝐼‘𝑦)) < 𝑟) ↔ ((𝑥(dist‘𝑅)𝑦) < 𝑠 → ((𝐼‘𝑥)(dist‘𝑅)(𝐼‘𝑦)) < 𝑟)))
71	70	ralbidva 3176	. . . . . 6 ⊢ ((𝑅 ∈ NrmRing ∧ (𝑥 ∈ 𝑈 ∧ 𝑟 ∈ ℝ⁺)) → (∀𝑦 ∈ 𝑈 ((𝑥((dist‘𝑅) ↾ (𝑈 × 𝑈))𝑦) < 𝑠 → ((𝐼‘𝑥)((dist‘𝑅) ↾ (𝑈 × 𝑈))(𝐼‘𝑦)) < 𝑟) ↔ ∀𝑦 ∈ 𝑈 ((𝑥(dist‘𝑅)𝑦) < 𝑠 → ((𝐼‘𝑥)(dist‘𝑅)(𝐼‘𝑦)) < 𝑟)))
72	71	rexbidv 3179	. . . . 5 ⊢ ((𝑅 ∈ NrmRing ∧ (𝑥 ∈ 𝑈 ∧ 𝑟 ∈ ℝ⁺)) → (∃𝑠 ∈ ℝ⁺ ∀𝑦 ∈ 𝑈 ((𝑥((dist‘𝑅) ↾ (𝑈 × 𝑈))𝑦) < 𝑠 → ((𝐼‘𝑥)((dist‘𝑅) ↾ (𝑈 × 𝑈))(𝐼‘𝑦)) < 𝑟) ↔ ∃𝑠 ∈ ℝ⁺ ∀𝑦 ∈ 𝑈 ((𝑥(dist‘𝑅)𝑦) < 𝑠 → ((𝐼‘𝑥)(dist‘𝑅)(𝐼‘𝑦)) < 𝑟)))
73	61, 72	mpbird 257	. . . 4 ⊢ ((𝑅 ∈ NrmRing ∧ (𝑥 ∈ 𝑈 ∧ 𝑟 ∈ ℝ⁺)) → ∃𝑠 ∈ ℝ⁺ ∀𝑦 ∈ 𝑈 ((𝑥((dist‘𝑅) ↾ (𝑈 × 𝑈))𝑦) < 𝑠 → ((𝐼‘𝑥)((dist‘𝑅) ↾ (𝑈 × 𝑈))(𝐼‘𝑦)) < 𝑟))
74	73	ralrimivva 3201	. . 3 ⊢ (𝑅 ∈ NrmRing → ∀𝑥 ∈ 𝑈 ∀𝑟 ∈ ℝ⁺ ∃𝑠 ∈ ℝ⁺ ∀𝑦 ∈ 𝑈 ((𝑥((dist‘𝑅) ↾ (𝑈 × 𝑈))𝑦) < 𝑠 → ((𝐼‘𝑥)((dist‘𝑅) ↾ (𝑈 × 𝑈))(𝐼‘𝑦)) < 𝑟))
75		xpss12 5692	. . . . . . 7 ⊢ ((𝑈 ⊆ 𝑋 ∧ 𝑈 ⊆ 𝑋) → (𝑈 × 𝑈) ⊆ (𝑋 × 𝑋))
76	14, 14, 75	mp2an 691	. . . . . 6 ⊢ (𝑈 × 𝑈) ⊆ (𝑋 × 𝑋)
77		resabs1 6012	. . . . . 6 ⊢ ((𝑈 × 𝑈) ⊆ (𝑋 × 𝑋) → (((dist‘𝑅) ↾ (𝑋 × 𝑋)) ↾ (𝑈 × 𝑈)) = ((dist‘𝑅) ↾ (𝑈 × 𝑈)))
78	76, 77	ax-mp 5	. . . . 5 ⊢ (((dist‘𝑅) ↾ (𝑋 × 𝑋)) ↾ (𝑈 × 𝑈)) = ((dist‘𝑅) ↾ (𝑈 × 𝑈))
79		eqid 2733	. . . . . . . 8 ⊢ ((dist‘𝑅) ↾ (𝑋 × 𝑋)) = ((dist‘𝑅) ↾ (𝑋 × 𝑋))
80	13, 79	xmsxmet 23962	. . . . . . 7 ⊢ (𝑅 ∈ ∞MetSp → ((dist‘𝑅) ↾ (𝑋 × 𝑋)) ∈ (∞Met‘𝑋))
81	24, 25, 26, 80	4syl 19	. . . . . 6 ⊢ (𝑅 ∈ NrmRing → ((dist‘𝑅) ↾ (𝑋 × 𝑋)) ∈ (∞Met‘𝑋))
82		xmetres2 23867	. . . . . 6 ⊢ ((((dist‘𝑅) ↾ (𝑋 × 𝑋)) ∈ (∞Met‘𝑋) ∧ 𝑈 ⊆ 𝑋) → (((dist‘𝑅) ↾ (𝑋 × 𝑋)) ↾ (𝑈 × 𝑈)) ∈ (∞Met‘𝑈))
83	81, 14, 82	sylancl 587	. . . . 5 ⊢ (𝑅 ∈ NrmRing → (((dist‘𝑅) ↾ (𝑋 × 𝑋)) ↾ (𝑈 × 𝑈)) ∈ (∞Met‘𝑈))
84	78, 83	eqeltrrid 2839	. . . 4 ⊢ (𝑅 ∈ NrmRing → ((dist‘𝑅) ↾ (𝑈 × 𝑈)) ∈ (∞Met‘𝑈))
85		eqid 2733	. . . . 5 ⊢ (MetOpen‘((dist‘𝑅) ↾ (𝑈 × 𝑈))) = (MetOpen‘((dist‘𝑅) ↾ (𝑈 × 𝑈)))
86	85, 85	metcn 24052	. . . 4 ⊢ ((((dist‘𝑅) ↾ (𝑈 × 𝑈)) ∈ (∞Met‘𝑈) ∧ ((dist‘𝑅) ↾ (𝑈 × 𝑈)) ∈ (∞Met‘𝑈)) → (𝐼 ∈ ((MetOpen‘((dist‘𝑅) ↾ (𝑈 × 𝑈))) Cn (MetOpen‘((dist‘𝑅) ↾ (𝑈 × 𝑈)))) ↔ (𝐼:𝑈⟶𝑈 ∧ ∀𝑥 ∈ 𝑈 ∀𝑟 ∈ ℝ⁺ ∃𝑠 ∈ ℝ⁺ ∀𝑦 ∈ 𝑈 ((𝑥((dist‘𝑅) ↾ (𝑈 × 𝑈))𝑦) < 𝑠 → ((𝐼‘𝑥)((dist‘𝑅) ↾ (𝑈 × 𝑈))(𝐼‘𝑦)) < 𝑟))))
87	84, 84, 86	syl2anc 585	. . 3 ⊢ (𝑅 ∈ NrmRing → (𝐼 ∈ ((MetOpen‘((dist‘𝑅) ↾ (𝑈 × 𝑈))) Cn (MetOpen‘((dist‘𝑅) ↾ (𝑈 × 𝑈)))) ↔ (𝐼:𝑈⟶𝑈 ∧ ∀𝑥 ∈ 𝑈 ∀𝑟 ∈ ℝ⁺ ∃𝑠 ∈ ℝ⁺ ∀𝑦 ∈ 𝑈 ((𝑥((dist‘𝑅) ↾ (𝑈 × 𝑈))𝑦) < 𝑠 → ((𝐼‘𝑥)((dist‘𝑅) ↾ (𝑈 × 𝑈))(𝐼‘𝑦)) < 𝑟))))
88	9, 74, 87	mpbir2and 712	. 2 ⊢ (𝑅 ∈ NrmRing → 𝐼 ∈ ((MetOpen‘((dist‘𝑅) ↾ (𝑈 × 𝑈))) Cn (MetOpen‘((dist‘𝑅) ↾ (𝑈 × 𝑈)))))
89		nrginvrcn.j	. . . . . . 7 ⊢ 𝐽 = (TopOpen‘𝑅)
90	89, 13, 79	mstopn 23958	. . . . . 6 ⊢ (𝑅 ∈ MetSp → 𝐽 = (MetOpen‘((dist‘𝑅) ↾ (𝑋 × 𝑋))))
91	24, 25, 90	3syl 18	. . . . 5 ⊢ (𝑅 ∈ NrmRing → 𝐽 = (MetOpen‘((dist‘𝑅) ↾ (𝑋 × 𝑋))))
92	91	oveq1d 7424	. . . 4 ⊢ (𝑅 ∈ NrmRing → (𝐽 ↾_t 𝑈) = ((MetOpen‘((dist‘𝑅) ↾ (𝑋 × 𝑋))) ↾_t 𝑈))
93	78	eqcomi 2742	. . . . . 6 ⊢ ((dist‘𝑅) ↾ (𝑈 × 𝑈)) = (((dist‘𝑅) ↾ (𝑋 × 𝑋)) ↾ (𝑈 × 𝑈))
94		eqid 2733	. . . . . 6 ⊢ (MetOpen‘((dist‘𝑅) ↾ (𝑋 × 𝑋))) = (MetOpen‘((dist‘𝑅) ↾ (𝑋 × 𝑋)))
95	93, 94, 85	metrest 24033	. . . . 5 ⊢ ((((dist‘𝑅) ↾ (𝑋 × 𝑋)) ∈ (∞Met‘𝑋) ∧ 𝑈 ⊆ 𝑋) → ((MetOpen‘((dist‘𝑅) ↾ (𝑋 × 𝑋))) ↾_t 𝑈) = (MetOpen‘((dist‘𝑅) ↾ (𝑈 × 𝑈))))
96	81, 14, 95	sylancl 587	. . . 4 ⊢ (𝑅 ∈ NrmRing → ((MetOpen‘((dist‘𝑅) ↾ (𝑋 × 𝑋))) ↾_t 𝑈) = (MetOpen‘((dist‘𝑅) ↾ (𝑈 × 𝑈))))
97	92, 96	eqtrd 2773	. . 3 ⊢ (𝑅 ∈ NrmRing → (𝐽 ↾_t 𝑈) = (MetOpen‘((dist‘𝑅) ↾ (𝑈 × 𝑈))))
98	97, 97	oveq12d 7427	. 2 ⊢ (𝑅 ∈ NrmRing → ((𝐽 ↾_t 𝑈) Cn (𝐽 ↾_t 𝑈)) = ((MetOpen‘((dist‘𝑅) ↾ (𝑈 × 𝑈))) Cn (MetOpen‘((dist‘𝑅) ↾ (𝑈 × 𝑈)))))
99	88, 98	eleqtrrd 2837	1 ⊢ (𝑅 ∈ NrmRing → 𝐼 ∈ ((𝐽 ↾_t 𝑈) Cn (𝐽 ↾_t 𝑈)))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 397 = wceq 1542 ∈ wcel 2107 ≠ wne 2941 ∀wral 3062 ∃wrex 3071 ⊆ wss 3949 ∅c0 4323 ifcif 4529 class class class wbr 5149 × cxp 5675 ↾ cres 5679 ⟶wf 6540 ‘cfv 6544 (class class class)co 7409 0cc0 11110 1c1 11111 · cmul 11115 < clt 11248 ≤ cle 11249 / cdiv 11871 2c2 12267 ℝ⁺crp 12974 Basecbs 17144 ↾_s cress 17173 distcds 17206 ↾_t crest 17366 TopOpenctopn 17367 0_gc0g 17385 Grpcgrp 18819 mulGrpcmgp 19987 1_rcur 20004 Ringcrg 20056 Unitcui 20169 inv_rcinvr 20201 NzRingcnzr 20291 ∞Metcxmet 20929 MetOpencmopn 20934 Cn ccn 22728 ∞MetSpcxms 23823 MetSpcms 23824 normcnm 24085 NrmGrpcngp 24086 NrmRingcnrg 24088

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1914 ax-6 1972 ax-7 2012 ax-8 2109 ax-9 2117 ax-10 2138 ax-11 2155 ax-12 2172 ax-ext 2704 ax-rep 5286 ax-sep 5300 ax-nul 5307 ax-pow 5364 ax-pr 5428 ax-un 7725 ax-cnex 11166 ax-resscn 11167 ax-1cn 11168 ax-icn 11169 ax-addcl 11170 ax-addrcl 11171 ax-mulcl 11172 ax-mulrcl 11173 ax-mulcom 11174 ax-addass 11175 ax-mulass 11176 ax-distr 11177 ax-i2m1 11178 ax-1ne0 11179 ax-1rid 11180 ax-rnegex 11181 ax-rrecex 11182 ax-cnre 11183 ax-pre-lttri 11184 ax-pre-lttrn 11185 ax-pre-ltadd 11186 ax-pre-mulgt0 11187 ax-pre-sup 11188

This theorem depends on definitions: df-bi 206 df-an 398 df-or 847 df-3or 1089 df-3an 1090 df-tru 1545 df-fal 1555 df-ex 1783 df-nf 1787 df-sb 2069 df-mo 2535 df-eu 2564 df-clab 2711 df-cleq 2725 df-clel 2811 df-nfc 2886 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-rmo 3377 df-reu 3378 df-rab 3434 df-v 3477 df-sbc 3779 df-csb 3895 df-dif 3952 df-un 3954 df-in 3956 df-ss 3966 df-pss 3968 df-nul 4324 df-if 4530 df-pw 4605 df-sn 4630 df-pr 4632 df-tp 4634 df-op 4636 df-uni 4910 df-iun 5000 df-br 5150 df-opab 5212 df-mpt 5233 df-tr 5267 df-id 5575 df-eprel 5581 df-po 5589 df-so 5590 df-fr 5632 df-we 5634 df-xp 5683 df-rel 5684 df-cnv 5685 df-co 5686 df-dm 5687 df-rn 5688 df-res 5689 df-ima 5690 df-pred 6301 df-ord 6368 df-on 6369 df-lim 6370 df-suc 6371 df-iota 6496 df-fun 6546 df-fn 6547 df-f 6548 df-f1 6549 df-fo 6550 df-f1o 6551 df-fv 6552 df-riota 7365 df-ov 7412 df-oprab 7413 df-mpo 7414 df-om 7856 df-1st 7975 df-2nd 7976 df-tpos 8211 df-frecs 8266 df-wrecs 8297 df-recs 8371 df-rdg 8410 df-1o 8466 df-er 8703 df-map 8822 df-en 8940 df-dom 8941 df-sdom 8942 df-fin 8943 df-sup 9437 df-inf 9438 df-pnf 11250 df-mnf 11251 df-xr 11252 df-ltxr 11253 df-le 11254 df-sub 11446 df-neg 11447 df-div 11872 df-nn 12213 df-2 12275 df-3 12276 df-4 12277 df-5 12278 df-6 12279 df-7 12280 df-8 12281 df-9 12282 df-n0 12473 df-z 12559 df-dec 12678 df-uz 12823 df-q 12933 df-rp 12975 df-xneg 13092 df-xadd 13093 df-xmul 13094 df-fz 13485 df-seq 13967 df-exp 14028 df-cj 15046 df-re 15047 df-im 15048 df-sqrt 15182 df-abs 15183 df-struct 17080 df-sets 17097 df-slot 17115 df-ndx 17127 df-base 17145 df-ress 17174 df-plusg 17210 df-mulr 17211 df-tset 17216 df-ple 17217 df-ds 17219 df-rest 17368 df-0g 17387 df-topgen 17389 df-xrs 17448 df-mgm 18561 df-sgrp 18610 df-mnd 18626 df-grp 18822 df-minusg 18823 df-sbg 18824 df-mgp 19988 df-ur 20005 df-ring 20058 df-oppr 20150 df-dvdsr 20171 df-unit 20172 df-invr 20202 df-nzr 20292 df-abv 20425 df-psmet 20936 df-xmet 20937 df-met 20938 df-bl 20939 df-mopn 20940 df-top 22396 df-topon 22413 df-topsp 22435 df-bases 22449 df-cn 22731 df-cnp 22732 df-xms 23826 df-ms 23827 df-nm 24091 df-ngp 24092 df-nrg 24094

This theorem is referenced by: nrgtdrg 24210

W3C validator