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Theorem methaus 24449

Description: The topology generated by a metric space is Hausdorff. (Contributed by Mario Carneiro, 21-Mar-2015.) (Revised by Mario Carneiro, 26-Aug-2015.)

**Hypothesis**
Ref	Expression
methaus.1	⊢ 𝐽 = (MetOpen‘𝐷)

**Assertion**
Ref	Expression
methaus	⊢ (𝐷 ∈ (∞Met‘𝑋) → 𝐽 ∈ Haus)

Proof of Theorem methaus Dummy variables 𝑛 𝑑 𝑥 𝑦 𝑚 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		methaus.1	. . 3 ⊢ 𝐽 = (MetOpen‘𝐷)
2	1	mopnex 24448	. 2 ⊢ (𝐷 ∈ (∞Met‘𝑋) → ∃𝑑 ∈ (Met‘𝑋)𝐽 = (MetOpen‘𝑑))
3		metxmet 24260	. . . . . . . . . 10 ⊢ (𝑑 ∈ (Met‘𝑋) → 𝑑 ∈ (∞Met‘𝑋))
4	3	ad2antrr 724	. . . . . . . . 9 ⊢ (((𝑑 ∈ (Met‘𝑋) ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) ∧ 𝑥 ≠ 𝑦) → 𝑑 ∈ (∞Met‘𝑋))
5		simplrl 775	. . . . . . . . 9 ⊢ (((𝑑 ∈ (Met‘𝑋) ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) ∧ 𝑥 ≠ 𝑦) → 𝑥 ∈ 𝑋)
6		metcl 24258	. . . . . . . . . . . . . 14 ⊢ ((𝑑 ∈ (Met‘𝑋) ∧ 𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋) → (𝑥𝑑𝑦) ∈ ℝ)
7	6	3expb 1117	. . . . . . . . . . . . 13 ⊢ ((𝑑 ∈ (Met‘𝑋) ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) → (𝑥𝑑𝑦) ∈ ℝ)
8	7	adantr 479	. . . . . . . . . . . 12 ⊢ (((𝑑 ∈ (Met‘𝑋) ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) ∧ 𝑥 ≠ 𝑦) → (𝑥𝑑𝑦) ∈ ℝ)
9		metgt0 24285	. . . . . . . . . . . . . 14 ⊢ ((𝑑 ∈ (Met‘𝑋) ∧ 𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋) → (𝑥 ≠ 𝑦 ↔ 0 < (𝑥𝑑𝑦)))
10	9	3expb 1117	. . . . . . . . . . . . 13 ⊢ ((𝑑 ∈ (Met‘𝑋) ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) → (𝑥 ≠ 𝑦 ↔ 0 < (𝑥𝑑𝑦)))
11	10	biimpa 475	. . . . . . . . . . . 12 ⊢ (((𝑑 ∈ (Met‘𝑋) ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) ∧ 𝑥 ≠ 𝑦) → 0 < (𝑥𝑑𝑦))
12	8, 11	elrpd 13053	. . . . . . . . . . 11 ⊢ (((𝑑 ∈ (Met‘𝑋) ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) ∧ 𝑥 ≠ 𝑦) → (𝑥𝑑𝑦) ∈ ℝ⁺)
13	12	rphalfcld 13068	. . . . . . . . . 10 ⊢ (((𝑑 ∈ (Met‘𝑋) ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) ∧ 𝑥 ≠ 𝑦) → ((𝑥𝑑𝑦) / 2) ∈ ℝ⁺)
14	13	rpxrd 13057	. . . . . . . . 9 ⊢ (((𝑑 ∈ (Met‘𝑋) ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) ∧ 𝑥 ≠ 𝑦) → ((𝑥𝑑𝑦) / 2) ∈ ℝ^*)
15		eqid 2728	. . . . . . . . . 10 ⊢ (MetOpen‘𝑑) = (MetOpen‘𝑑)
16	15	blopn 24429	. . . . . . . . 9 ⊢ ((𝑑 ∈ (∞Met‘𝑋) ∧ 𝑥 ∈ 𝑋 ∧ ((𝑥𝑑𝑦) / 2) ∈ ℝ^*) → (𝑥(ball‘𝑑)((𝑥𝑑𝑦) / 2)) ∈ (MetOpen‘𝑑))
17	4, 5, 14, 16	syl3anc 1368	. . . . . . . 8 ⊢ (((𝑑 ∈ (Met‘𝑋) ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) ∧ 𝑥 ≠ 𝑦) → (𝑥(ball‘𝑑)((𝑥𝑑𝑦) / 2)) ∈ (MetOpen‘𝑑))
18		simplrr 776	. . . . . . . . 9 ⊢ (((𝑑 ∈ (Met‘𝑋) ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) ∧ 𝑥 ≠ 𝑦) → 𝑦 ∈ 𝑋)
19	15	blopn 24429	. . . . . . . . 9 ⊢ ((𝑑 ∈ (∞Met‘𝑋) ∧ 𝑦 ∈ 𝑋 ∧ ((𝑥𝑑𝑦) / 2) ∈ ℝ^*) → (𝑦(ball‘𝑑)((𝑥𝑑𝑦) / 2)) ∈ (MetOpen‘𝑑))
20	4, 18, 14, 19	syl3anc 1368	. . . . . . . 8 ⊢ (((𝑑 ∈ (Met‘𝑋) ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) ∧ 𝑥 ≠ 𝑦) → (𝑦(ball‘𝑑)((𝑥𝑑𝑦) / 2)) ∈ (MetOpen‘𝑑))
21		blcntr 24339	. . . . . . . . 9 ⊢ ((𝑑 ∈ (∞Met‘𝑋) ∧ 𝑥 ∈ 𝑋 ∧ ((𝑥𝑑𝑦) / 2) ∈ ℝ⁺) → 𝑥 ∈ (𝑥(ball‘𝑑)((𝑥𝑑𝑦) / 2)))
22	4, 5, 13, 21	syl3anc 1368	. . . . . . . 8 ⊢ (((𝑑 ∈ (Met‘𝑋) ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) ∧ 𝑥 ≠ 𝑦) → 𝑥 ∈ (𝑥(ball‘𝑑)((𝑥𝑑𝑦) / 2)))
23		blcntr 24339	. . . . . . . . 9 ⊢ ((𝑑 ∈ (∞Met‘𝑋) ∧ 𝑦 ∈ 𝑋 ∧ ((𝑥𝑑𝑦) / 2) ∈ ℝ⁺) → 𝑦 ∈ (𝑦(ball‘𝑑)((𝑥𝑑𝑦) / 2)))
24	4, 18, 13, 23	syl3anc 1368	. . . . . . . 8 ⊢ (((𝑑 ∈ (Met‘𝑋) ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) ∧ 𝑥 ≠ 𝑦) → 𝑦 ∈ (𝑦(ball‘𝑑)((𝑥𝑑𝑦) / 2)))
25	13	rpred 13056	. . . . . . . . . . . 12 ⊢ (((𝑑 ∈ (Met‘𝑋) ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) ∧ 𝑥 ≠ 𝑦) → ((𝑥𝑑𝑦) / 2) ∈ ℝ)
26	25, 25	rexaddd 13253	. . . . . . . . . . 11 ⊢ (((𝑑 ∈ (Met‘𝑋) ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) ∧ 𝑥 ≠ 𝑦) → (((𝑥𝑑𝑦) / 2) +_𝑒 ((𝑥𝑑𝑦) / 2)) = (((𝑥𝑑𝑦) / 2) + ((𝑥𝑑𝑦) / 2)))
27	8	recnd 11280	. . . . . . . . . . . 12 ⊢ (((𝑑 ∈ (Met‘𝑋) ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) ∧ 𝑥 ≠ 𝑦) → (𝑥𝑑𝑦) ∈ ℂ)
28	27	2halvesd 12496	. . . . . . . . . . 11 ⊢ (((𝑑 ∈ (Met‘𝑋) ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) ∧ 𝑥 ≠ 𝑦) → (((𝑥𝑑𝑦) / 2) + ((𝑥𝑑𝑦) / 2)) = (𝑥𝑑𝑦))
29	26, 28	eqtrd 2768	. . . . . . . . . 10 ⊢ (((𝑑 ∈ (Met‘𝑋) ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) ∧ 𝑥 ≠ 𝑦) → (((𝑥𝑑𝑦) / 2) +_𝑒 ((𝑥𝑑𝑦) / 2)) = (𝑥𝑑𝑦))
30	8	leidd 11818	. . . . . . . . . 10 ⊢ (((𝑑 ∈ (Met‘𝑋) ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) ∧ 𝑥 ≠ 𝑦) → (𝑥𝑑𝑦) ≤ (𝑥𝑑𝑦))
31	29, 30	eqbrtrd 5174	. . . . . . . . 9 ⊢ (((𝑑 ∈ (Met‘𝑋) ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) ∧ 𝑥 ≠ 𝑦) → (((𝑥𝑑𝑦) / 2) +_𝑒 ((𝑥𝑑𝑦) / 2)) ≤ (𝑥𝑑𝑦))
32		bldisj 24324	. . . . . . . . 9 ⊢ (((𝑑 ∈ (∞Met‘𝑋) ∧ 𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋) ∧ (((𝑥𝑑𝑦) / 2) ∈ ℝ^* ∧ ((𝑥𝑑𝑦) / 2) ∈ ℝ^* ∧ (((𝑥𝑑𝑦) / 2) +_𝑒 ((𝑥𝑑𝑦) / 2)) ≤ (𝑥𝑑𝑦))) → ((𝑥(ball‘𝑑)((𝑥𝑑𝑦) / 2)) ∩ (𝑦(ball‘𝑑)((𝑥𝑑𝑦) / 2))) = ∅)
33	4, 5, 18, 14, 14, 31, 32	syl33anc 1382	. . . . . . . 8 ⊢ (((𝑑 ∈ (Met‘𝑋) ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) ∧ 𝑥 ≠ 𝑦) → ((𝑥(ball‘𝑑)((𝑥𝑑𝑦) / 2)) ∩ (𝑦(ball‘𝑑)((𝑥𝑑𝑦) / 2))) = ∅)
34		eleq2 2818	. . . . . . . . . 10 ⊢ (𝑚 = (𝑥(ball‘𝑑)((𝑥𝑑𝑦) / 2)) → (𝑥 ∈ 𝑚 ↔ 𝑥 ∈ (𝑥(ball‘𝑑)((𝑥𝑑𝑦) / 2))))
35		ineq1 4207	. . . . . . . . . . 11 ⊢ (𝑚 = (𝑥(ball‘𝑑)((𝑥𝑑𝑦) / 2)) → (𝑚 ∩ 𝑛) = ((𝑥(ball‘𝑑)((𝑥𝑑𝑦) / 2)) ∩ 𝑛))
36	35	eqeq1d 2730	. . . . . . . . . 10 ⊢ (𝑚 = (𝑥(ball‘𝑑)((𝑥𝑑𝑦) / 2)) → ((𝑚 ∩ 𝑛) = ∅ ↔ ((𝑥(ball‘𝑑)((𝑥𝑑𝑦) / 2)) ∩ 𝑛) = ∅))
37	34, 36	3anbi13d 1434	. . . . . . . . 9 ⊢ (𝑚 = (𝑥(ball‘𝑑)((𝑥𝑑𝑦) / 2)) → ((𝑥 ∈ 𝑚 ∧ 𝑦 ∈ 𝑛 ∧ (𝑚 ∩ 𝑛) = ∅) ↔ (𝑥 ∈ (𝑥(ball‘𝑑)((𝑥𝑑𝑦) / 2)) ∧ 𝑦 ∈ 𝑛 ∧ ((𝑥(ball‘𝑑)((𝑥𝑑𝑦) / 2)) ∩ 𝑛) = ∅)))
38		eleq2 2818	. . . . . . . . . 10 ⊢ (𝑛 = (𝑦(ball‘𝑑)((𝑥𝑑𝑦) / 2)) → (𝑦 ∈ 𝑛 ↔ 𝑦 ∈ (𝑦(ball‘𝑑)((𝑥𝑑𝑦) / 2))))
39		ineq2 4208	. . . . . . . . . . 11 ⊢ (𝑛 = (𝑦(ball‘𝑑)((𝑥𝑑𝑦) / 2)) → ((𝑥(ball‘𝑑)((𝑥𝑑𝑦) / 2)) ∩ 𝑛) = ((𝑥(ball‘𝑑)((𝑥𝑑𝑦) / 2)) ∩ (𝑦(ball‘𝑑)((𝑥𝑑𝑦) / 2))))
40	39	eqeq1d 2730	. . . . . . . . . 10 ⊢ (𝑛 = (𝑦(ball‘𝑑)((𝑥𝑑𝑦) / 2)) → (((𝑥(ball‘𝑑)((𝑥𝑑𝑦) / 2)) ∩ 𝑛) = ∅ ↔ ((𝑥(ball‘𝑑)((𝑥𝑑𝑦) / 2)) ∩ (𝑦(ball‘𝑑)((𝑥𝑑𝑦) / 2))) = ∅))
41	38, 40	3anbi23d 1435	. . . . . . . . 9 ⊢ (𝑛 = (𝑦(ball‘𝑑)((𝑥𝑑𝑦) / 2)) → ((𝑥 ∈ (𝑥(ball‘𝑑)((𝑥𝑑𝑦) / 2)) ∧ 𝑦 ∈ 𝑛 ∧ ((𝑥(ball‘𝑑)((𝑥𝑑𝑦) / 2)) ∩ 𝑛) = ∅) ↔ (𝑥 ∈ (𝑥(ball‘𝑑)((𝑥𝑑𝑦) / 2)) ∧ 𝑦 ∈ (𝑦(ball‘𝑑)((𝑥𝑑𝑦) / 2)) ∧ ((𝑥(ball‘𝑑)((𝑥𝑑𝑦) / 2)) ∩ (𝑦(ball‘𝑑)((𝑥𝑑𝑦) / 2))) = ∅)))
42	37, 41	rspc2ev 3624	. . . . . . . 8 ⊢ (((𝑥(ball‘𝑑)((𝑥𝑑𝑦) / 2)) ∈ (MetOpen‘𝑑) ∧ (𝑦(ball‘𝑑)((𝑥𝑑𝑦) / 2)) ∈ (MetOpen‘𝑑) ∧ (𝑥 ∈ (𝑥(ball‘𝑑)((𝑥𝑑𝑦) / 2)) ∧ 𝑦 ∈ (𝑦(ball‘𝑑)((𝑥𝑑𝑦) / 2)) ∧ ((𝑥(ball‘𝑑)((𝑥𝑑𝑦) / 2)) ∩ (𝑦(ball‘𝑑)((𝑥𝑑𝑦) / 2))) = ∅)) → ∃𝑚 ∈ (MetOpen‘𝑑)∃𝑛 ∈ (MetOpen‘𝑑)(𝑥 ∈ 𝑚 ∧ 𝑦 ∈ 𝑛 ∧ (𝑚 ∩ 𝑛) = ∅))
43	17, 20, 22, 24, 33, 42	syl113anc 1379	. . . . . . 7 ⊢ (((𝑑 ∈ (Met‘𝑋) ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) ∧ 𝑥 ≠ 𝑦) → ∃𝑚 ∈ (MetOpen‘𝑑)∃𝑛 ∈ (MetOpen‘𝑑)(𝑥 ∈ 𝑚 ∧ 𝑦 ∈ 𝑛 ∧ (𝑚 ∩ 𝑛) = ∅))
44	43	ex 411	. . . . . 6 ⊢ ((𝑑 ∈ (Met‘𝑋) ∧ (𝑥 ∈ 𝑋 ∧ 𝑦 ∈ 𝑋)) → (𝑥 ≠ 𝑦 → ∃𝑚 ∈ (MetOpen‘𝑑)∃𝑛 ∈ (MetOpen‘𝑑)(𝑥 ∈ 𝑚 ∧ 𝑦 ∈ 𝑛 ∧ (𝑚 ∩ 𝑛) = ∅)))
45	44	ralrimivva 3198	. . . . 5 ⊢ (𝑑 ∈ (Met‘𝑋) → ∀𝑥 ∈ 𝑋 ∀𝑦 ∈ 𝑋 (𝑥 ≠ 𝑦 → ∃𝑚 ∈ (MetOpen‘𝑑)∃𝑛 ∈ (MetOpen‘𝑑)(𝑥 ∈ 𝑚 ∧ 𝑦 ∈ 𝑛 ∧ (𝑚 ∩ 𝑛) = ∅)))
46	15	mopntopon 24365	. . . . . 6 ⊢ (𝑑 ∈ (∞Met‘𝑋) → (MetOpen‘𝑑) ∈ (TopOn‘𝑋))
47		ishaus2 23275	. . . . . 6 ⊢ ((MetOpen‘𝑑) ∈ (TopOn‘𝑋) → ((MetOpen‘𝑑) ∈ Haus ↔ ∀𝑥 ∈ 𝑋 ∀𝑦 ∈ 𝑋 (𝑥 ≠ 𝑦 → ∃𝑚 ∈ (MetOpen‘𝑑)∃𝑛 ∈ (MetOpen‘𝑑)(𝑥 ∈ 𝑚 ∧ 𝑦 ∈ 𝑛 ∧ (𝑚 ∩ 𝑛) = ∅))))
48	3, 46, 47	3syl 18	. . . . 5 ⊢ (𝑑 ∈ (Met‘𝑋) → ((MetOpen‘𝑑) ∈ Haus ↔ ∀𝑥 ∈ 𝑋 ∀𝑦 ∈ 𝑋 (𝑥 ≠ 𝑦 → ∃𝑚 ∈ (MetOpen‘𝑑)∃𝑛 ∈ (MetOpen‘𝑑)(𝑥 ∈ 𝑚 ∧ 𝑦 ∈ 𝑛 ∧ (𝑚 ∩ 𝑛) = ∅))))
49	45, 48	mpbird 256	. . . 4 ⊢ (𝑑 ∈ (Met‘𝑋) → (MetOpen‘𝑑) ∈ Haus)
50		eleq1 2817	. . . 4 ⊢ (𝐽 = (MetOpen‘𝑑) → (𝐽 ∈ Haus ↔ (MetOpen‘𝑑) ∈ Haus))
51	49, 50	syl5ibrcom 246	. . 3 ⊢ (𝑑 ∈ (Met‘𝑋) → (𝐽 = (MetOpen‘𝑑) → 𝐽 ∈ Haus))
52	51	rexlimiv 3145	. 2 ⊢ (∃𝑑 ∈ (Met‘𝑋)𝐽 = (MetOpen‘𝑑) → 𝐽 ∈ Haus)
53	2, 52	syl 17	1 ⊢ (𝐷 ∈ (∞Met‘𝑋) → 𝐽 ∈ Haus)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 394 ∧ w3a 1084 = wceq 1533 ∈ wcel 2098 ≠ wne 2937 ∀wral 3058 ∃wrex 3067 ∩ cin 3948 ∅c0 4326 class class class wbr 5152 ‘cfv 6553 (class class class)co 7426 ℝcr 11145 0cc0 11146 + caddc 11149 ℝ^*cxr 11285 < clt 11286 ≤ cle 11287 / cdiv 11909 2c2 12305 ℝ⁺crp 13014 +_𝑒 cxad 13130 ∞Metcxmet 21271 Metcmet 21272 ballcbl 21273 MetOpencmopn 21276 TopOnctopon 22832 Hauscha 23232

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2166 ax-ext 2699 ax-sep 5303 ax-nul 5310 ax-pow 5369 ax-pr 5433 ax-un 7746 ax-cnex 11202 ax-resscn 11203 ax-1cn 11204 ax-icn 11205 ax-addcl 11206 ax-addrcl 11207 ax-mulcl 11208 ax-mulrcl 11209 ax-mulcom 11210 ax-addass 11211 ax-mulass 11212 ax-distr 11213 ax-i2m1 11214 ax-1ne0 11215 ax-1rid 11216 ax-rnegex 11217 ax-rrecex 11218 ax-cnre 11219 ax-pre-lttri 11220 ax-pre-lttrn 11221 ax-pre-ltadd 11222 ax-pre-mulgt0 11223 ax-pre-sup 11224

This theorem depends on definitions: df-bi 206 df-an 395 df-or 846 df-3or 1085 df-3an 1086 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2529 df-eu 2558 df-clab 2706 df-cleq 2720 df-clel 2806 df-nfc 2881 df-ne 2938 df-nel 3044 df-ral 3059 df-rex 3068 df-rmo 3374 df-reu 3375 df-rab 3431 df-v 3475 df-sbc 3779 df-csb 3895 df-dif 3952 df-un 3954 df-in 3956 df-ss 3966 df-pss 3968 df-nul 4327 df-if 4533 df-pw 4608 df-sn 4633 df-pr 4635 df-op 4639 df-uni 4913 df-iun 5002 df-br 5153 df-opab 5215 df-mpt 5236 df-tr 5270 df-id 5580 df-eprel 5586 df-po 5594 df-so 5595 df-fr 5637 df-we 5639 df-xp 5688 df-rel 5689 df-cnv 5690 df-co 5691 df-dm 5692 df-rn 5693 df-res 5694 df-ima 5695 df-pred 6310 df-ord 6377 df-on 6378 df-lim 6379 df-suc 6380 df-iota 6505 df-fun 6555 df-fn 6556 df-f 6557 df-f1 6558 df-fo 6559 df-f1o 6560 df-fv 6561 df-riota 7382 df-ov 7429 df-oprab 7430 df-mpo 7431 df-om 7877 df-1st 7999 df-2nd 8000 df-frecs 8293 df-wrecs 8324 df-recs 8398 df-rdg 8437 df-er 8731 df-map 8853 df-en 8971 df-dom 8972 df-sdom 8973 df-sup 9473 df-inf 9474 df-pnf 11288 df-mnf 11289 df-xr 11290 df-ltxr 11291 df-le 11292 df-sub 11484 df-neg 11485 df-div 11910 df-nn 12251 df-2 12313 df-n0 12511 df-z 12597 df-uz 12861 df-q 12971 df-rp 13015 df-xneg 13132 df-xadd 13133 df-xmul 13134 df-icc 13371 df-topgen 17432 df-psmet 21278 df-xmet 21279 df-met 21280 df-bl 21281 df-mopn 21282 df-top 22816 df-topon 22833 df-bases 22869 df-haus 23239

This theorem is referenced by: cnfldhaus 24721 rehaus 24735 metreg 24799 lmcau 25261 metsscmetcld 25263 minveclem4a 25378 minvecolem4a 30707 minvecolem4b 30708 minvecolem4 30710 hlimf 31067 hmopidmchi 31981 rrhcn 33631 rrexthaus 33641 sitmcl 34004 heiborlem9 37325 bfplem1 37328

W3C validator