rrxsphere - Mathbox for Alexander van der Vekens

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Theorem rrxsphere 47512

Description: The sphere with center 𝑀 and radius 𝑅 in a generalized real Euclidean space of finite dimension. Remark: this theorem holds also for the degenerate case 𝑅 < 0 (negative radius): in this case, (𝑀𝑆𝑅) is empty. (Contributed by AV, 5-Feb-2023.)

**Hypotheses**
Ref	Expression
rrxspheres.e	⊢ 𝐸 = (ℝ^‘𝐼)
rrxspheres.p	⊢ 𝑃 = (ℝ ↑_m 𝐼)
rrxspheres.d	⊢ 𝐷 = (dist‘𝐸)
rrxspheres.s	⊢ 𝑆 = (Sphere‘𝐸)

**Assertion**
Ref	Expression
rrxsphere	⊢ ((𝐼 ∈ Fin ∧ 𝑀 ∈ 𝑃 ∧ 𝑅 ∈ ℝ) → (𝑀𝑆𝑅) = {𝑝 ∈ 𝑃 ∣ (𝑝𝐷𝑀) = 𝑅})

Distinct variable groups: 𝐸,𝑝 𝐼,𝑝 𝑀,𝑝 𝑃,𝑝 𝑅,𝑝 Allowed substitution hints: 𝐷(𝑝) 𝑆(𝑝)

Proof of Theorem rrxsphere Dummy variables 𝑟 𝑥 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		rrxspheres.e	. . . . . 6 ⊢ 𝐸 = (ℝ^‘𝐼)
2	1	fvexi 6905	. . . . 5 ⊢ 𝐸 ∈ V
3		rrxspheres.p	. . . . . . . . . 10 ⊢ 𝑃 = (ℝ ↑_m 𝐼)
4		id 22	. . . . . . . . . . 11 ⊢ (𝐼 ∈ Fin → 𝐼 ∈ Fin)
5		eqid 2732	. . . . . . . . . . 11 ⊢ (Base‘𝐸) = (Base‘𝐸)
6	4, 1, 5	rrxbasefi 24934	. . . . . . . . . 10 ⊢ (𝐼 ∈ Fin → (Base‘𝐸) = (ℝ ↑_m 𝐼))
7	3, 6	eqtr4id 2791	. . . . . . . . 9 ⊢ (𝐼 ∈ Fin → 𝑃 = (Base‘𝐸))
8	7	eleq2d 2819	. . . . . . . 8 ⊢ (𝐼 ∈ Fin → (𝑀 ∈ 𝑃 ↔ 𝑀 ∈ (Base‘𝐸)))
9	8	biimpa 477	. . . . . . 7 ⊢ ((𝐼 ∈ Fin ∧ 𝑀 ∈ 𝑃) → 𝑀 ∈ (Base‘𝐸))
10	9	3adant3 1132	. . . . . 6 ⊢ ((𝐼 ∈ Fin ∧ 𝑀 ∈ 𝑃 ∧ 𝑅 ∈ ℝ) → 𝑀 ∈ (Base‘𝐸))
11	10	adantl 482	. . . . 5 ⊢ ((0 ≤ 𝑅 ∧ (𝐼 ∈ Fin ∧ 𝑀 ∈ 𝑃 ∧ 𝑅 ∈ ℝ)) → 𝑀 ∈ (Base‘𝐸))
12		rexr 11262	. . . . . . . . 9 ⊢ (𝑅 ∈ ℝ → 𝑅 ∈ ℝ^*)
13	12	3ad2ant3 1135	. . . . . . . 8 ⊢ ((𝐼 ∈ Fin ∧ 𝑀 ∈ 𝑃 ∧ 𝑅 ∈ ℝ) → 𝑅 ∈ ℝ^*)
14	13	anim2i 617	. . . . . . 7 ⊢ ((0 ≤ 𝑅 ∧ (𝐼 ∈ Fin ∧ 𝑀 ∈ 𝑃 ∧ 𝑅 ∈ ℝ)) → (0 ≤ 𝑅 ∧ 𝑅 ∈ ℝ^*))
15	14	ancomd 462	. . . . . 6 ⊢ ((0 ≤ 𝑅 ∧ (𝐼 ∈ Fin ∧ 𝑀 ∈ 𝑃 ∧ 𝑅 ∈ ℝ)) → (𝑅 ∈ ℝ^* ∧ 0 ≤ 𝑅))
16		elxrge0 13436	. . . . . 6 ⊢ (𝑅 ∈ (0[,]+∞) ↔ (𝑅 ∈ ℝ^* ∧ 0 ≤ 𝑅))
17	15, 16	sylibr 233	. . . . 5 ⊢ ((0 ≤ 𝑅 ∧ (𝐼 ∈ Fin ∧ 𝑀 ∈ 𝑃 ∧ 𝑅 ∈ ℝ)) → 𝑅 ∈ (0[,]+∞))
18		rrxspheres.s	. . . . . 6 ⊢ 𝑆 = (Sphere‘𝐸)
19		rrxspheres.d	. . . . . 6 ⊢ 𝐷 = (dist‘𝐸)
20	5, 18, 19	sphere 47511	. . . . 5 ⊢ ((𝐸 ∈ V ∧ 𝑀 ∈ (Base‘𝐸) ∧ 𝑅 ∈ (0[,]+∞)) → (𝑀𝑆𝑅) = {𝑝 ∈ (Base‘𝐸) ∣ (𝑝𝐷𝑀) = 𝑅})
21	2, 11, 17, 20	mp3an2i 1466	. . . 4 ⊢ ((0 ≤ 𝑅 ∧ (𝐼 ∈ Fin ∧ 𝑀 ∈ 𝑃 ∧ 𝑅 ∈ ℝ)) → (𝑀𝑆𝑅) = {𝑝 ∈ (Base‘𝐸) ∣ (𝑝𝐷𝑀) = 𝑅})
22		simp1 1136	. . . . . . . 8 ⊢ ((𝐼 ∈ Fin ∧ 𝑀 ∈ 𝑃 ∧ 𝑅 ∈ ℝ) → 𝐼 ∈ Fin)
23	22, 1, 5	rrxbasefi 24934	. . . . . . 7 ⊢ ((𝐼 ∈ Fin ∧ 𝑀 ∈ 𝑃 ∧ 𝑅 ∈ ℝ) → (Base‘𝐸) = (ℝ ↑_m 𝐼))
24	23, 3	eqtr4di 2790	. . . . . 6 ⊢ ((𝐼 ∈ Fin ∧ 𝑀 ∈ 𝑃 ∧ 𝑅 ∈ ℝ) → (Base‘𝐸) = 𝑃)
25	24	adantl 482	. . . . 5 ⊢ ((0 ≤ 𝑅 ∧ (𝐼 ∈ Fin ∧ 𝑀 ∈ 𝑃 ∧ 𝑅 ∈ ℝ)) → (Base‘𝐸) = 𝑃)
26	25	rabeqdv 3447	. . . 4 ⊢ ((0 ≤ 𝑅 ∧ (𝐼 ∈ Fin ∧ 𝑀 ∈ 𝑃 ∧ 𝑅 ∈ ℝ)) → {𝑝 ∈ (Base‘𝐸) ∣ (𝑝𝐷𝑀) = 𝑅} = {𝑝 ∈ 𝑃 ∣ (𝑝𝐷𝑀) = 𝑅})
27	21, 26	eqtrd 2772	. . 3 ⊢ ((0 ≤ 𝑅 ∧ (𝐼 ∈ Fin ∧ 𝑀 ∈ 𝑃 ∧ 𝑅 ∈ ℝ)) → (𝑀𝑆𝑅) = {𝑝 ∈ 𝑃 ∣ (𝑝𝐷𝑀) = 𝑅})
28	27	ex 413	. 2 ⊢ (0 ≤ 𝑅 → ((𝐼 ∈ Fin ∧ 𝑀 ∈ 𝑃 ∧ 𝑅 ∈ ℝ) → (𝑀𝑆𝑅) = {𝑝 ∈ 𝑃 ∣ (𝑝𝐷𝑀) = 𝑅}))
29	5, 18, 19	spheres 47510	. . . . . . 7 ⊢ (𝐸 ∈ V → 𝑆 = (𝑥 ∈ (Base‘𝐸), 𝑟 ∈ (0[,]+∞) ↦ {𝑝 ∈ (Base‘𝐸) ∣ (𝑝𝐷𝑥) = 𝑟}))
30	2, 29	ax-mp 5	. . . . . 6 ⊢ 𝑆 = (𝑥 ∈ (Base‘𝐸), 𝑟 ∈ (0[,]+∞) ↦ {𝑝 ∈ (Base‘𝐸) ∣ (𝑝𝐷𝑥) = 𝑟})
31		fvex 6904	. . . . . . 7 ⊢ (Base‘𝐸) ∈ V
32	31	rabex 5332	. . . . . 6 ⊢ {𝑝 ∈ (Base‘𝐸) ∣ (𝑝𝐷𝑥) = 𝑟} ∈ V
33	30, 32	dmmpo 8059	. . . . 5 ⊢ dom 𝑆 = ((Base‘𝐸) × (0[,]+∞))
34		0xr 11263	. . . . . . . . . . 11 ⊢ 0 ∈ ℝ^*
35		pnfxr 11270	. . . . . . . . . . 11 ⊢ +∞ ∈ ℝ^*
36	34, 35	pm3.2i 471	. . . . . . . . . 10 ⊢ (0 ∈ ℝ^* ∧ +∞ ∈ ℝ^*)
37		elicc1 13370	. . . . . . . . . 10 ⊢ ((0 ∈ ℝ^* ∧ +∞ ∈ ℝ^) → (𝑅 ∈ (0[,]+∞) ↔ (𝑅 ∈ ℝ^ ∧ 0 ≤ 𝑅 ∧ 𝑅 ≤ +∞)))
38	36, 37	mp1i 13	. . . . . . . . 9 ⊢ ((𝐼 ∈ Fin ∧ 𝑀 ∈ 𝑃 ∧ 𝑅 ∈ ℝ) → (𝑅 ∈ (0[,]+∞) ↔ (𝑅 ∈ ℝ^* ∧ 0 ≤ 𝑅 ∧ 𝑅 ≤ +∞)))
39		simp2 1137	. . . . . . . . 9 ⊢ ((𝑅 ∈ ℝ^* ∧ 0 ≤ 𝑅 ∧ 𝑅 ≤ +∞) → 0 ≤ 𝑅)
40	38, 39	syl6bi 252	. . . . . . . 8 ⊢ ((𝐼 ∈ Fin ∧ 𝑀 ∈ 𝑃 ∧ 𝑅 ∈ ℝ) → (𝑅 ∈ (0[,]+∞) → 0 ≤ 𝑅))
41	40	con3d 152	. . . . . . 7 ⊢ ((𝐼 ∈ Fin ∧ 𝑀 ∈ 𝑃 ∧ 𝑅 ∈ ℝ) → (¬ 0 ≤ 𝑅 → ¬ 𝑅 ∈ (0[,]+∞)))
42	41	imp 407	. . . . . 6 ⊢ (((𝐼 ∈ Fin ∧ 𝑀 ∈ 𝑃 ∧ 𝑅 ∈ ℝ) ∧ ¬ 0 ≤ 𝑅) → ¬ 𝑅 ∈ (0[,]+∞))
43	42	intnand 489	. . . . 5 ⊢ (((𝐼 ∈ Fin ∧ 𝑀 ∈ 𝑃 ∧ 𝑅 ∈ ℝ) ∧ ¬ 0 ≤ 𝑅) → ¬ (𝑀 ∈ (Base‘𝐸) ∧ 𝑅 ∈ (0[,]+∞)))
44		ndmovg 7592	. . . . 5 ⊢ ((dom 𝑆 = ((Base‘𝐸) × (0[,]+∞)) ∧ ¬ (𝑀 ∈ (Base‘𝐸) ∧ 𝑅 ∈ (0[,]+∞))) → (𝑀𝑆𝑅) = ∅)
45	33, 43, 44	sylancr 587	. . . 4 ⊢ (((𝐼 ∈ Fin ∧ 𝑀 ∈ 𝑃 ∧ 𝑅 ∈ ℝ) ∧ ¬ 0 ≤ 𝑅) → (𝑀𝑆𝑅) = ∅)
46	1	fveq2i 6894	. . . . . . . . . . . . . . . 16 ⊢ (dist‘𝐸) = (dist‘(ℝ^‘𝐼))
47	19, 46	eqtri 2760	. . . . . . . . . . . . . . 15 ⊢ 𝐷 = (dist‘(ℝ^‘𝐼))
48	47	rrxmetfi 24936	. . . . . . . . . . . . . 14 ⊢ (𝐼 ∈ Fin → 𝐷 ∈ (Met‘(ℝ ↑_m 𝐼)))
49	48	3ad2ant1 1133	. . . . . . . . . . . . 13 ⊢ ((𝐼 ∈ Fin ∧ 𝑀 ∈ 𝑃 ∧ 𝑅 ∈ ℝ) → 𝐷 ∈ (Met‘(ℝ ↑_m 𝐼)))
50	49	adantr 481	. . . . . . . . . . . 12 ⊢ (((𝐼 ∈ Fin ∧ 𝑀 ∈ 𝑃 ∧ 𝑅 ∈ ℝ) ∧ 𝑝 ∈ 𝑃) → 𝐷 ∈ (Met‘(ℝ ↑_m 𝐼)))
51	3	fveq2i 6894	. . . . . . . . . . . 12 ⊢ (Met‘𝑃) = (Met‘(ℝ ↑_m 𝐼))
52	50, 51	eleqtrrdi 2844	. . . . . . . . . . 11 ⊢ (((𝐼 ∈ Fin ∧ 𝑀 ∈ 𝑃 ∧ 𝑅 ∈ ℝ) ∧ 𝑝 ∈ 𝑃) → 𝐷 ∈ (Met‘𝑃))
53		simpr 485	. . . . . . . . . . 11 ⊢ (((𝐼 ∈ Fin ∧ 𝑀 ∈ 𝑃 ∧ 𝑅 ∈ ℝ) ∧ 𝑝 ∈ 𝑃) → 𝑝 ∈ 𝑃)
54		simp2 1137	. . . . . . . . . . . 12 ⊢ ((𝐼 ∈ Fin ∧ 𝑀 ∈ 𝑃 ∧ 𝑅 ∈ ℝ) → 𝑀 ∈ 𝑃)
55	54	adantr 481	. . . . . . . . . . 11 ⊢ (((𝐼 ∈ Fin ∧ 𝑀 ∈ 𝑃 ∧ 𝑅 ∈ ℝ) ∧ 𝑝 ∈ 𝑃) → 𝑀 ∈ 𝑃)
56		metge0 23858	. . . . . . . . . . 11 ⊢ ((𝐷 ∈ (Met‘𝑃) ∧ 𝑝 ∈ 𝑃 ∧ 𝑀 ∈ 𝑃) → 0 ≤ (𝑝𝐷𝑀))
57	52, 53, 55, 56	syl3anc 1371	. . . . . . . . . 10 ⊢ (((𝐼 ∈ Fin ∧ 𝑀 ∈ 𝑃 ∧ 𝑅 ∈ ℝ) ∧ 𝑝 ∈ 𝑃) → 0 ≤ (𝑝𝐷𝑀))
58		breq2 5152	. . . . . . . . . 10 ⊢ ((𝑝𝐷𝑀) = 𝑅 → (0 ≤ (𝑝𝐷𝑀) ↔ 0 ≤ 𝑅))
59	57, 58	syl5ibcom 244	. . . . . . . . 9 ⊢ (((𝐼 ∈ Fin ∧ 𝑀 ∈ 𝑃 ∧ 𝑅 ∈ ℝ) ∧ 𝑝 ∈ 𝑃) → ((𝑝𝐷𝑀) = 𝑅 → 0 ≤ 𝑅))
60	59	con3d 152	. . . . . . . 8 ⊢ (((𝐼 ∈ Fin ∧ 𝑀 ∈ 𝑃 ∧ 𝑅 ∈ ℝ) ∧ 𝑝 ∈ 𝑃) → (¬ 0 ≤ 𝑅 → ¬ (𝑝𝐷𝑀) = 𝑅))
61	60	impancom 452	. . . . . . 7 ⊢ (((𝐼 ∈ Fin ∧ 𝑀 ∈ 𝑃 ∧ 𝑅 ∈ ℝ) ∧ ¬ 0 ≤ 𝑅) → (𝑝 ∈ 𝑃 → ¬ (𝑝𝐷𝑀) = 𝑅))
62	61	imp 407	. . . . . 6 ⊢ ((((𝐼 ∈ Fin ∧ 𝑀 ∈ 𝑃 ∧ 𝑅 ∈ ℝ) ∧ ¬ 0 ≤ 𝑅) ∧ 𝑝 ∈ 𝑃) → ¬ (𝑝𝐷𝑀) = 𝑅)
63	62	ralrimiva 3146	. . . . 5 ⊢ (((𝐼 ∈ Fin ∧ 𝑀 ∈ 𝑃 ∧ 𝑅 ∈ ℝ) ∧ ¬ 0 ≤ 𝑅) → ∀𝑝 ∈ 𝑃 ¬ (𝑝𝐷𝑀) = 𝑅)
64		eqcom 2739	. . . . . 6 ⊢ (∅ = {𝑝 ∈ 𝑃 ∣ (𝑝𝐷𝑀) = 𝑅} ↔ {𝑝 ∈ 𝑃 ∣ (𝑝𝐷𝑀) = 𝑅} = ∅)
65		rabeq0 4384	. . . . . 6 ⊢ ({𝑝 ∈ 𝑃 ∣ (𝑝𝐷𝑀) = 𝑅} = ∅ ↔ ∀𝑝 ∈ 𝑃 ¬ (𝑝𝐷𝑀) = 𝑅)
66	64, 65	bitri 274	. . . . 5 ⊢ (∅ = {𝑝 ∈ 𝑃 ∣ (𝑝𝐷𝑀) = 𝑅} ↔ ∀𝑝 ∈ 𝑃 ¬ (𝑝𝐷𝑀) = 𝑅)
67	63, 66	sylibr 233	. . . 4 ⊢ (((𝐼 ∈ Fin ∧ 𝑀 ∈ 𝑃 ∧ 𝑅 ∈ ℝ) ∧ ¬ 0 ≤ 𝑅) → ∅ = {𝑝 ∈ 𝑃 ∣ (𝑝𝐷𝑀) = 𝑅})
68	45, 67	eqtrd 2772	. . 3 ⊢ (((𝐼 ∈ Fin ∧ 𝑀 ∈ 𝑃 ∧ 𝑅 ∈ ℝ) ∧ ¬ 0 ≤ 𝑅) → (𝑀𝑆𝑅) = {𝑝 ∈ 𝑃 ∣ (𝑝𝐷𝑀) = 𝑅})
69	68	expcom 414	. 2 ⊢ (¬ 0 ≤ 𝑅 → ((𝐼 ∈ Fin ∧ 𝑀 ∈ 𝑃 ∧ 𝑅 ∈ ℝ) → (𝑀𝑆𝑅) = {𝑝 ∈ 𝑃 ∣ (𝑝𝐷𝑀) = 𝑅}))
70	28, 69	pm2.61i 182	1 ⊢ ((𝐼 ∈ Fin ∧ 𝑀 ∈ 𝑃 ∧ 𝑅 ∈ ℝ) → (𝑀𝑆𝑅) = {𝑝 ∈ 𝑃 ∣ (𝑝𝐷𝑀) = 𝑅})

Colors of variables: wff setvar class

Syntax hints: ¬ wn 3 → wi 4 ↔ wb 205 ∧ wa 396 ∧ w3a 1087 = wceq 1541 ∈ wcel 2106 ∀wral 3061 {crab 3432 Vcvv 3474 ∅c0 4322 class class class wbr 5148 × cxp 5674 dom cdm 5676 ‘cfv 6543 (class class class)co 7411 ∈ cmpo 7413 ↑_m cmap 8822 Fincfn 8941 ℝcr 11111 0cc0 11112 +∞cpnf 11247 ℝ^*cxr 11249 ≤ cle 11251 [,]cicc 13329 Basecbs 17146 distcds 17208 Metcmet 20936 ℝ^crrx 24907 Spherecsph 47492

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2703 ax-rep 5285 ax-sep 5299 ax-nul 5306 ax-pow 5363 ax-pr 5427 ax-un 7727 ax-inf2 9638 ax-cnex 11168 ax-resscn 11169 ax-1cn 11170 ax-icn 11171 ax-addcl 11172 ax-addrcl 11173 ax-mulcl 11174 ax-mulrcl 11175 ax-mulcom 11176 ax-addass 11177 ax-mulass 11178 ax-distr 11179 ax-i2m1 11180 ax-1ne0 11181 ax-1rid 11182 ax-rnegex 11183 ax-rrecex 11184 ax-cnre 11185 ax-pre-lttri 11186 ax-pre-lttrn 11187 ax-pre-ltadd 11188 ax-pre-mulgt0 11189 ax-pre-sup 11190 ax-addf 11191 ax-mulf 11192

This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3or 1088 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2534 df-eu 2563 df-clab 2710 df-cleq 2724 df-clel 2810 df-nfc 2885 df-ne 2941 df-nel 3047 df-ral 3062 df-rex 3071 df-rmo 3376 df-reu 3377 df-rab 3433 df-v 3476 df-sbc 3778 df-csb 3894 df-dif 3951 df-un 3953 df-in 3955 df-ss 3965 df-pss 3967 df-nul 4323 df-if 4529 df-pw 4604 df-sn 4629 df-pr 4631 df-tp 4633 df-op 4635 df-uni 4909 df-int 4951 df-iun 4999 df-br 5149 df-opab 5211 df-mpt 5232 df-tr 5266 df-id 5574 df-eprel 5580 df-po 5588 df-so 5589 df-fr 5631 df-se 5632 df-we 5633 df-xp 5682 df-rel 5683 df-cnv 5684 df-co 5685 df-dm 5686 df-rn 5687 df-res 5688 df-ima 5689 df-pred 6300 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6495 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-isom 6552 df-riota 7367 df-ov 7414 df-oprab 7415 df-mpo 7416 df-of 7672 df-om 7858 df-1st 7977 df-2nd 7978 df-supp 8149 df-tpos 8213 df-frecs 8268 df-wrecs 8299 df-recs 8373 df-rdg 8412 df-1o 8468 df-er 8705 df-map 8824 df-ixp 8894 df-en 8942 df-dom 8943 df-sdom 8944 df-fin 8945 df-fsupp 9364 df-sup 9439 df-oi 9507 df-card 9936 df-pnf 11252 df-mnf 11253 df-xr 11254 df-ltxr 11255 df-le 11256 df-sub 11448 df-neg 11449 df-div 11874 df-nn 12215 df-2 12277 df-3 12278 df-4 12279 df-5 12280 df-6 12281 df-7 12282 df-8 12283 df-9 12284 df-n0 12475 df-z 12561 df-dec 12680 df-uz 12825 df-rp 12977 df-xneg 13094 df-xadd 13095 df-xmul 13096 df-ico 13332 df-icc 13333 df-fz 13487 df-fzo 13630 df-seq 13969 df-exp 14030 df-hash 14293 df-cj 15048 df-re 15049 df-im 15050 df-sqrt 15184 df-abs 15185 df-clim 15434 df-sum 15635 df-struct 17082 df-sets 17099 df-slot 17117 df-ndx 17129 df-base 17147 df-ress 17176 df-plusg 17212 df-mulr 17213 df-starv 17214 df-sca 17215 df-vsca 17216 df-ip 17217 df-tset 17218 df-ple 17219 df-ds 17221 df-unif 17222 df-hom 17223 df-cco 17224 df-0g 17389 df-gsum 17390 df-prds 17395 df-pws 17397 df-mgm 18563 df-sgrp 18612 df-mnd 18628 df-mhm 18673 df-grp 18824 df-minusg 18825 df-sbg 18826 df-subg 19005 df-ghm 19092 df-cntz 19183 df-cmn 19652 df-abl 19653 df-mgp 19990 df-ur 20007 df-ring 20060 df-cring 20061 df-oppr 20154 df-dvdsr 20175 df-unit 20176 df-invr 20206 df-dvr 20219 df-rnghom 20255 df-subrg 20321 df-drng 20363 df-field 20364 df-staf 20457 df-srng 20458 df-lmod 20477 df-lss 20548 df-sra 20791 df-rgmod 20792 df-xmet 20943 df-met 20944 df-cnfld 20951 df-refld 21164 df-dsmm 21293 df-frlm 21308 df-nm 24098 df-tng 24100 df-tcph 24693 df-rrx 24909 df-sph 47494

This theorem is referenced by: 2sphere 47513

W3C validator