Theorem isdrng2 19514

Description: A division ring can equivalently be defined as a ring such that the nonzero elements form a group under multiplication (from which it follows that this is the same group as the group of units). (Contributed by Mario Carneiro, 2-Dec-2014.)

Hypotheses

Ref	Expression
isdrng2.b	⊢ 𝐵 = (Base‘𝑅)
isdrng2.z	⊢ 0 = (0g‘𝑅)
isdrng2.g	⊢ 𝐺 = ((mulGrp‘𝑅) ↾s (𝐵 ∖ { 0 }))

Assertion

Ref	Expression
isdrng2	⊢ (𝑅 ∈ DivRing ↔ (𝑅 ∈ Ring ∧ 𝐺 ∈ Grp))

Proof of Theorem isdrng2

Dummy variable 𝑥 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		isdrng2.b	. . 3 ⊢ 𝐵 = (Base‘𝑅)
2		eqid 2823	. . 3 ⊢ (Unit‘𝑅) = (Unit‘𝑅)
3		isdrng2.z	. . 3 ⊢ 0 = (0g‘𝑅)
4	1, 2, 3	isdrng 19508	. 2 ⊢ (𝑅 ∈ DivRing ↔ (𝑅 ∈ Ring ∧ (Unit‘𝑅) = (𝐵 ∖ { 0 })))
5		oveq2 7166	. . . . . . 7 ⊢ ((Unit‘𝑅) = (𝐵 ∖ { 0 }) → ((mulGrp‘𝑅) ↾s (Unit‘𝑅)) = ((mulGrp‘𝑅) ↾s (𝐵 ∖ { 0 })))
6	5	adantl 484	. . . . . 6 ⊢ ((𝑅 ∈ Ring ∧ (Unit‘𝑅) = (𝐵 ∖ { 0 })) → ((mulGrp‘𝑅) ↾s (Unit‘𝑅)) = ((mulGrp‘𝑅) ↾s (𝐵 ∖ { 0 })))
7		isdrng2.g	. . . . . 6 ⊢ 𝐺 = ((mulGrp‘𝑅) ↾s (𝐵 ∖ { 0 }))
8	6, 7	syl6eqr 2876	. . . . 5 ⊢ ((𝑅 ∈ Ring ∧ (Unit‘𝑅) = (𝐵 ∖ { 0 })) → ((mulGrp‘𝑅) ↾s (Unit‘𝑅)) = 𝐺)
9		eqid 2823	. . . . . . 7 ⊢ ((mulGrp‘𝑅) ↾s (Unit‘𝑅)) = ((mulGrp‘𝑅) ↾s (Unit‘𝑅))
10	2, 9	unitgrp 19419	. . . . . 6 ⊢ (𝑅 ∈ Ring → ((mulGrp‘𝑅) ↾s (Unit‘𝑅)) ∈ Grp)
11	10	adantr 483	. . . . 5 ⊢ ((𝑅 ∈ Ring ∧ (Unit‘𝑅) = (𝐵 ∖ { 0 })) → ((mulGrp‘𝑅) ↾s (Unit‘𝑅)) ∈ Grp)
12	8, 11	eqeltrrd 2916	. . . 4 ⊢ ((𝑅 ∈ Ring ∧ (Unit‘𝑅) = (𝐵 ∖ { 0 })) → 𝐺 ∈ Grp)
13	1, 2	unitcl 19411	. . . . . . . . 9 ⊢ (𝑥 ∈ (Unit‘𝑅) → 𝑥 ∈ 𝐵)
14	13	adantl 484	. . . . . . . 8 ⊢ (((𝑅 ∈ Ring ∧ 𝐺 ∈ Grp) ∧ 𝑥 ∈ (Unit‘𝑅)) → 𝑥 ∈ 𝐵)
15		difss 4110	. . . . . . . . . . . . . . 15 ⊢ (𝐵 ∖ { 0 }) ⊆ 𝐵
16		eqid 2823	. . . . . . . . . . . . . . . . 17 ⊢ (mulGrp‘𝑅) = (mulGrp‘𝑅)
17	16, 1	mgpbas 19247	. . . . . . . . . . . . . . . 16 ⊢ 𝐵 = (Base‘(mulGrp‘𝑅))
18	7, 17	ressbas2 16557	. . . . . . . . . . . . . . 15 ⊢ ((𝐵 ∖ { 0 }) ⊆ 𝐵 → (𝐵 ∖ { 0 }) = (Base‘𝐺))
19	15, 18	ax-mp 5	. . . . . . . . . . . . . 14 ⊢ (𝐵 ∖ { 0 }) = (Base‘𝐺)
20		eqid 2823	. . . . . . . . . . . . . 14 ⊢ (0g‘𝐺) = (0g‘𝐺)
21	19, 20	grpidcl 18133	. . . . . . . . . . . . 13 ⊢ (𝐺 ∈ Grp → (0g‘𝐺) ∈ (𝐵 ∖ { 0 }))
22	21	ad2antlr 725	. . . . . . . . . . . 12 ⊢ (((𝑅 ∈ Ring ∧ 𝐺 ∈ Grp) ∧ 𝑥 ∈ (Unit‘𝑅)) → (0g‘𝐺) ∈ (𝐵 ∖ { 0 }))
23		eldifsn 4721	. . . . . . . . . . . 12 ⊢ ((0g‘𝐺) ∈ (𝐵 ∖ { 0 }) ↔ ((0g‘𝐺) ∈ 𝐵 ∧ (0g‘𝐺) ≠ 0 ))
24	22, 23	sylib 220	. . . . . . . . . . 11 ⊢ (((𝑅 ∈ Ring ∧ 𝐺 ∈ Grp) ∧ 𝑥 ∈ (Unit‘𝑅)) → ((0g‘𝐺) ∈ 𝐵 ∧ (0g‘𝐺) ≠ 0 ))
25	24	simprd 498	. . . . . . . . . 10 ⊢ (((𝑅 ∈ Ring ∧ 𝐺 ∈ Grp) ∧ 𝑥 ∈ (Unit‘𝑅)) → (0g‘𝐺) ≠ 0 )
26		simpll 765	. . . . . . . . . . 11 ⊢ (((𝑅 ∈ Ring ∧ 𝐺 ∈ Grp) ∧ 𝑥 ∈ (Unit‘𝑅)) → 𝑅 ∈ Ring)
27	22	eldifad 3950	. . . . . . . . . . 11 ⊢ (((𝑅 ∈ Ring ∧ 𝐺 ∈ Grp) ∧ 𝑥 ∈ (Unit‘𝑅)) → (0g‘𝐺) ∈ 𝐵)
28		simpr 487	. . . . . . . . . . 11 ⊢ (((𝑅 ∈ Ring ∧ 𝐺 ∈ Grp) ∧ 𝑥 ∈ (Unit‘𝑅)) → 𝑥 ∈ (Unit‘𝑅))
29		eqid 2823	. . . . . . . . . . . 12 ⊢ (/r‘𝑅) = (/r‘𝑅)
30		eqid 2823	. . . . . . . . . . . 12 ⊢ (.r‘𝑅) = (.r‘𝑅)
31	1, 2, 29, 30	dvrcan1 19443	. . . . . . . . . . 11 ⊢ ((𝑅 ∈ Ring ∧ (0g‘𝐺) ∈ 𝐵 ∧ 𝑥 ∈ (Unit‘𝑅)) → (((0g‘𝐺)(/r‘𝑅)𝑥)(.r‘𝑅)𝑥) = (0g‘𝐺))
32	26, 27, 28, 31	syl3anc 1367	. . . . . . . . . 10 ⊢ (((𝑅 ∈ Ring ∧ 𝐺 ∈ Grp) ∧ 𝑥 ∈ (Unit‘𝑅)) → (((0g‘𝐺)(/r‘𝑅)𝑥)(.r‘𝑅)𝑥) = (0g‘𝐺))
33	1, 2, 29	dvrcl 19438	. . . . . . . . . . . 12 ⊢ ((𝑅 ∈ Ring ∧ (0g‘𝐺) ∈ 𝐵 ∧ 𝑥 ∈ (Unit‘𝑅)) → ((0g‘𝐺)(/r‘𝑅)𝑥) ∈ 𝐵)
34	26, 27, 28, 33	syl3anc 1367	. . . . . . . . . . 11 ⊢ (((𝑅 ∈ Ring ∧ 𝐺 ∈ Grp) ∧ 𝑥 ∈ (Unit‘𝑅)) → ((0g‘𝐺)(/r‘𝑅)𝑥) ∈ 𝐵)
35	1, 30, 3	ringrz 19340	. . . . . . . . . . 11 ⊢ ((𝑅 ∈ Ring ∧ ((0g‘𝐺)(/r‘𝑅)𝑥) ∈ 𝐵) → (((0g‘𝐺)(/r‘𝑅)𝑥)(.r‘𝑅) 0 ) = 0 )
36	26, 34, 35	syl2anc 586	. . . . . . . . . 10 ⊢ (((𝑅 ∈ Ring ∧ 𝐺 ∈ Grp) ∧ 𝑥 ∈ (Unit‘𝑅)) → (((0g‘𝐺)(/r‘𝑅)𝑥)(.r‘𝑅) 0 ) = 0 )
37	25, 32, 36	3netr4d 3095	. . . . . . . . 9 ⊢ (((𝑅 ∈ Ring ∧ 𝐺 ∈ Grp) ∧ 𝑥 ∈ (Unit‘𝑅)) → (((0g‘𝐺)(/r‘𝑅)𝑥)(.r‘𝑅)𝑥) ≠ (((0g‘𝐺)(/r‘𝑅)𝑥)(.r‘𝑅) 0 ))
38		oveq2 7166	. . . . . . . . . 10 ⊢ (𝑥 = 0 → (((0g‘𝐺)(/r‘𝑅)𝑥)(.r‘𝑅)𝑥) = (((0g‘𝐺)(/r‘𝑅)𝑥)(.r‘𝑅) 0 ))
39	38	necon3i 3050	. . . . . . . . 9 ⊢ ((((0g‘𝐺)(/r‘𝑅)𝑥)(.r‘𝑅)𝑥) ≠ (((0g‘𝐺)(/r‘𝑅)𝑥)(.r‘𝑅) 0 ) → 𝑥 ≠ 0 )
40	37, 39	syl 17	. . . . . . . 8 ⊢ (((𝑅 ∈ Ring ∧ 𝐺 ∈ Grp) ∧ 𝑥 ∈ (Unit‘𝑅)) → 𝑥 ≠ 0 )
41		eldifsn 4721	. . . . . . . 8 ⊢ (𝑥 ∈ (𝐵 ∖ { 0 }) ↔ (𝑥 ∈ 𝐵 ∧ 𝑥 ≠ 0 ))
42	14, 40, 41	sylanbrc 585	. . . . . . 7 ⊢ (((𝑅 ∈ Ring ∧ 𝐺 ∈ Grp) ∧ 𝑥 ∈ (Unit‘𝑅)) → 𝑥 ∈ (𝐵 ∖ { 0 }))
43	42	ex 415	. . . . . 6 ⊢ ((𝑅 ∈ Ring ∧ 𝐺 ∈ Grp) → (𝑥 ∈ (Unit‘𝑅) → 𝑥 ∈ (𝐵 ∖ { 0 })))
44	43	ssrdv 3975	. . . . 5 ⊢ ((𝑅 ∈ Ring ∧ 𝐺 ∈ Grp) → (Unit‘𝑅) ⊆ (𝐵 ∖ { 0 }))
45		eldifi 4105	. . . . . . . . 9 ⊢ (𝑥 ∈ (𝐵 ∖ { 0 }) → 𝑥 ∈ 𝐵)
46	45	adantl 484	. . . . . . . 8 ⊢ (((𝑅 ∈ Ring ∧ 𝐺 ∈ Grp) ∧ 𝑥 ∈ (𝐵 ∖ { 0 })) → 𝑥 ∈ 𝐵)
47		eqid 2823	. . . . . . . . . . 11 ⊢ (invg‘𝐺) = (invg‘𝐺)
48	19, 47	grpinvcl 18153	. . . . . . . . . 10 ⊢ ((𝐺 ∈ Grp ∧ 𝑥 ∈ (𝐵 ∖ { 0 })) → ((invg‘𝐺)‘𝑥) ∈ (𝐵 ∖ { 0 }))
49	48	adantll 712	. . . . . . . . 9 ⊢ (((𝑅 ∈ Ring ∧ 𝐺 ∈ Grp) ∧ 𝑥 ∈ (𝐵 ∖ { 0 })) → ((invg‘𝐺)‘𝑥) ∈ (𝐵 ∖ { 0 }))
50	49	eldifad 3950	. . . . . . . 8 ⊢ (((𝑅 ∈ Ring ∧ 𝐺 ∈ Grp) ∧ 𝑥 ∈ (𝐵 ∖ { 0 })) → ((invg‘𝐺)‘𝑥) ∈ 𝐵)
51		eqid 2823	. . . . . . . . 9 ⊢ (∥r‘𝑅) = (∥r‘𝑅)
52	1, 51, 30	dvdsrmul 19400	. . . . . . . 8 ⊢ ((𝑥 ∈ 𝐵 ∧ ((invg‘𝐺)‘𝑥) ∈ 𝐵) → 𝑥(∥r‘𝑅)(((invg‘𝐺)‘𝑥)(.r‘𝑅)𝑥))
53	46, 50, 52	syl2anc 586	. . . . . . 7 ⊢ (((𝑅 ∈ Ring ∧ 𝐺 ∈ Grp) ∧ 𝑥 ∈ (𝐵 ∖ { 0 })) → 𝑥(∥r‘𝑅)(((invg‘𝐺)‘𝑥)(.r‘𝑅)𝑥))
54	1	fvexi 6686	. . . . . . . . . . 11 ⊢ 𝐵 ∈ V
55		difexg 5233	. . . . . . . . . . 11 ⊢ (𝐵 ∈ V → (𝐵 ∖ { 0 }) ∈ V)
56	16, 30	mgpplusg 19245	. . . . . . . . . . . 12 ⊢ (.r‘𝑅) = (+g‘(mulGrp‘𝑅))
57	7, 56	ressplusg 16614	. . . . . . . . . . 11 ⊢ ((𝐵 ∖ { 0 }) ∈ V → (.r‘𝑅) = (+g‘𝐺))
58	54, 55, 57	mp2b 10	. . . . . . . . . 10 ⊢ (.r‘𝑅) = (+g‘𝐺)
59	19, 58, 20, 47	grplinv 18154	. . . . . . . . 9 ⊢ ((𝐺 ∈ Grp ∧ 𝑥 ∈ (𝐵 ∖ { 0 })) → (((invg‘𝐺)‘𝑥)(.r‘𝑅)𝑥) = (0g‘𝐺))
60	59	adantll 712	. . . . . . . 8 ⊢ (((𝑅 ∈ Ring ∧ 𝐺 ∈ Grp) ∧ 𝑥 ∈ (𝐵 ∖ { 0 })) → (((invg‘𝐺)‘𝑥)(.r‘𝑅)𝑥) = (0g‘𝐺))
61		eqid 2823	. . . . . . . . . . . . 13 ⊢ (1r‘𝑅) = (1r‘𝑅)
62	1, 61	ringidcl 19320	. . . . . . . . . . . 12 ⊢ (𝑅 ∈ Ring → (1r‘𝑅) ∈ 𝐵)
63	1, 30, 61	ringlidm 19323	. . . . . . . . . . . 12 ⊢ ((𝑅 ∈ Ring ∧ (1r‘𝑅) ∈ 𝐵) → ((1r‘𝑅)(.r‘𝑅)(1r‘𝑅)) = (1r‘𝑅))
64	62, 63	mpdan 685	. . . . . . . . . . 11 ⊢ (𝑅 ∈ Ring → ((1r‘𝑅)(.r‘𝑅)(1r‘𝑅)) = (1r‘𝑅))
65	64	adantr 483	. . . . . . . . . 10 ⊢ ((𝑅 ∈ Ring ∧ 𝐺 ∈ Grp) → ((1r‘𝑅)(.r‘𝑅)(1r‘𝑅)) = (1r‘𝑅))
66		simpr 487	. . . . . . . . . . 11 ⊢ ((𝑅 ∈ Ring ∧ 𝐺 ∈ Grp) → 𝐺 ∈ Grp)
67	2, 61	1unit 19410	. . . . . . . . . . . . 13 ⊢ (𝑅 ∈ Ring → (1r‘𝑅) ∈ (Unit‘𝑅))
68	67	adantr 483	. . . . . . . . . . . 12 ⊢ ((𝑅 ∈ Ring ∧ 𝐺 ∈ Grp) → (1r‘𝑅) ∈ (Unit‘𝑅))
69	44, 68	sseldd 3970	. . . . . . . . . . 11 ⊢ ((𝑅 ∈ Ring ∧ 𝐺 ∈ Grp) → (1r‘𝑅) ∈ (𝐵 ∖ { 0 }))
70	19, 58, 20	grpid 18141	. . . . . . . . . . 11 ⊢ ((𝐺 ∈ Grp ∧ (1r‘𝑅) ∈ (𝐵 ∖ { 0 })) → (((1r‘𝑅)(.r‘𝑅)(1r‘𝑅)) = (1r‘𝑅) ↔ (0g‘𝐺) = (1r‘𝑅)))
71	66, 69, 70	syl2anc 586	. . . . . . . . . 10 ⊢ ((𝑅 ∈ Ring ∧ 𝐺 ∈ Grp) → (((1r‘𝑅)(.r‘𝑅)(1r‘𝑅)) = (1r‘𝑅) ↔ (0g‘𝐺) = (1r‘𝑅)))
72	65, 71	mpbid 234	. . . . . . . . 9 ⊢ ((𝑅 ∈ Ring ∧ 𝐺 ∈ Grp) → (0g‘𝐺) = (1r‘𝑅))
73	72	adantr 483	. . . . . . . 8 ⊢ (((𝑅 ∈ Ring ∧ 𝐺 ∈ Grp) ∧ 𝑥 ∈ (𝐵 ∖ { 0 })) → (0g‘𝐺) = (1r‘𝑅))
74	60, 73	eqtrd 2858	. . . . . . 7 ⊢ (((𝑅 ∈ Ring ∧ 𝐺 ∈ Grp) ∧ 𝑥 ∈ (𝐵 ∖ { 0 })) → (((invg‘𝐺)‘𝑥)(.r‘𝑅)𝑥) = (1r‘𝑅))
75	53, 74	breqtrd 5094	. . . . . 6 ⊢ (((𝑅 ∈ Ring ∧ 𝐺 ∈ Grp) ∧ 𝑥 ∈ (𝐵 ∖ { 0 })) → 𝑥(∥r‘𝑅)(1r‘𝑅))
76		eqid 2823	. . . . . . . . . 10 ⊢ (oppr‘𝑅) = (oppr‘𝑅)
77	76, 1	opprbas 19381	. . . . . . . . 9 ⊢ 𝐵 = (Base‘(oppr‘𝑅))
78		eqid 2823	. . . . . . . . 9 ⊢ (∥r‘(oppr‘𝑅)) = (∥r‘(oppr‘𝑅))
79		eqid 2823	. . . . . . . . 9 ⊢ (.r‘(oppr‘𝑅)) = (.r‘(oppr‘𝑅))
80	77, 78, 79	dvdsrmul 19400	. . . . . . . 8 ⊢ ((𝑥 ∈ 𝐵 ∧ ((invg‘𝐺)‘𝑥) ∈ 𝐵) → 𝑥(∥r‘(oppr‘𝑅))(((invg‘𝐺)‘𝑥)(.r‘(oppr‘𝑅))𝑥))
81	46, 50, 80	syl2anc 586	. . . . . . 7 ⊢ (((𝑅 ∈ Ring ∧ 𝐺 ∈ Grp) ∧ 𝑥 ∈ (𝐵 ∖ { 0 })) → 𝑥(∥r‘(oppr‘𝑅))(((invg‘𝐺)‘𝑥)(.r‘(oppr‘𝑅))𝑥))
82	1, 30, 76, 79	opprmul 19378	. . . . . . . 8 ⊢ (((invg‘𝐺)‘𝑥)(.r‘(oppr‘𝑅))𝑥) = (𝑥(.r‘𝑅)((invg‘𝐺)‘𝑥))
83	19, 58, 20, 47	grprinv 18155	. . . . . . . . . 10 ⊢ ((𝐺 ∈ Grp ∧ 𝑥 ∈ (𝐵 ∖ { 0 })) → (𝑥(.r‘𝑅)((invg‘𝐺)‘𝑥)) = (0g‘𝐺))
84	83	adantll 712	. . . . . . . . 9 ⊢ (((𝑅 ∈ Ring ∧ 𝐺 ∈ Grp) ∧ 𝑥 ∈ (𝐵 ∖ { 0 })) → (𝑥(.r‘𝑅)((invg‘𝐺)‘𝑥)) = (0g‘𝐺))
85	84, 73	eqtrd 2858	. . . . . . . 8 ⊢ (((𝑅 ∈ Ring ∧ 𝐺 ∈ Grp) ∧ 𝑥 ∈ (𝐵 ∖ { 0 })) → (𝑥(.r‘𝑅)((invg‘𝐺)‘𝑥)) = (1r‘𝑅))
86	82, 85	syl5eq 2870	. . . . . . 7 ⊢ (((𝑅 ∈ Ring ∧ 𝐺 ∈ Grp) ∧ 𝑥 ∈ (𝐵 ∖ { 0 })) → (((invg‘𝐺)‘𝑥)(.r‘(oppr‘𝑅))𝑥) = (1r‘𝑅))
87	81, 86	breqtrd 5094	. . . . . 6 ⊢ (((𝑅 ∈ Ring ∧ 𝐺 ∈ Grp) ∧ 𝑥 ∈ (𝐵 ∖ { 0 })) → 𝑥(∥r‘(oppr‘𝑅))(1r‘𝑅))
88	2, 61, 51, 76, 78	isunit 19409	. . . . . 6 ⊢ (𝑥 ∈ (Unit‘𝑅) ↔ (𝑥(∥r‘𝑅)(1r‘𝑅) ∧ 𝑥(∥r‘(oppr‘𝑅))(1r‘𝑅)))
89	75, 87, 88	sylanbrc 585	. . . . 5 ⊢ (((𝑅 ∈ Ring ∧ 𝐺 ∈ Grp) ∧ 𝑥 ∈ (𝐵 ∖ { 0 })) → 𝑥 ∈ (Unit‘𝑅))
90	44, 89	eqelssd 3990	. . . 4 ⊢ ((𝑅 ∈ Ring ∧ 𝐺 ∈ Grp) → (Unit‘𝑅) = (𝐵 ∖ { 0 }))
91	12, 90	impbida 799	. . 3 ⊢ (𝑅 ∈ Ring → ((Unit‘𝑅) = (𝐵 ∖ { 0 }) ↔ 𝐺 ∈ Grp))
92	91	pm5.32i 577	. 2 ⊢ ((𝑅 ∈ Ring ∧ (Unit‘𝑅) = (𝐵 ∖ { 0 })) ↔ (𝑅 ∈ Ring ∧ 𝐺 ∈ Grp))
93	4, 92	bitri 277	1 ⊢ (𝑅 ∈ DivRing ↔ (𝑅 ∈ Ring ∧ 𝐺 ∈ Grp))

Syntax hints:   ↔ wb 208   ∧ wa 398   = wceq 1537   ∈ wcel 2114   ≠ wne 3018  Vcvv 3496   ∖ cdif 3935   ⊆ wss 3938  {csn 4569   class class class wbr 5068  ‘cfv 6357  (class class class)co 7158  Basecbs 16485   ↾_s cress 16486  +_gcplusg 16567  ._rcmulr 16568  0_gc0g 16715  Grpcgrp 18105  inv_gcminusg 18106  mulGrpcmgp 19241  1_rcur 19253  Ringcrg 19299  opp_rcoppr 19374  ∥_rcdsr 19390  Unitcui 19391  /_rcdvr 19434  DivRingcdr 19504

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1970  ax-7 2015  ax-8 2116  ax-9 2124  ax-10 2145  ax-11 2161  ax-12 2177  ax-ext 2795  ax-rep 5192  ax-sep 5205  ax-nul 5212  ax-pow 5268  ax-pr 5332  ax-un 7463  ax-cnex 10595  ax-resscn 10596  ax-1cn 10597  ax-icn 10598  ax-addcl 10599  ax-addrcl 10600  ax-mulcl 10601  ax-mulrcl 10602  ax-mulcom 10603  ax-addass 10604  ax-mulass 10605  ax-distr 10606  ax-i2m1 10607  ax-1ne0 10608  ax-1rid 10609  ax-rnegex 10610  ax-rrecex 10611  ax-cnre 10612  ax-pre-lttri 10613  ax-pre-lttrn 10614  ax-pre-ltadd 10615  ax-pre-mulgt0 10616

This theorem depends on definitions:  df-bi 209  df-an 399  df-or 844  df-3or 1084  df-3an 1085  df-tru 1540  df-ex 1781  df-nf 1785  df-sb 2070  df-mo 2622  df-eu 2654  df-clab 2802  df-cleq 2816  df-clel 2895  df-nfc 2965  df-ne 3019  df-nel 3126  df-ral 3145  df-rex 3146  df-reu 3147  df-rmo 3148  df-rab 3149  df-v 3498  df-sbc 3775  df-csb 3886  df-dif 3941  df-un 3943  df-in 3945  df-ss 3954  df-pss 3956  df-nul 4294  df-if 4470  df-pw 4543  df-sn 4570  df-pr 4572  df-tp 4574  df-op 4576  df-uni 4841  df-iun 4923  df-br 5069  df-opab 5131  df-mpt 5149  df-tr 5175  df-id 5462  df-eprel 5467  df-po 5476  df-so 5477  df-fr 5516  df-we 5518  df-xp 5563  df-rel 5564  df-cnv 5565  df-co 5566  df-dm 5567  df-rn 5568  df-res 5569  df-ima 5570  df-pred 6150  df-ord 6196  df-on 6197  df-lim 6198  df-suc 6199  df-iota 6316  df-fun 6359  df-fn 6360  df-f 6361  df-f1 6362  df-fo 6363  df-f1o 6364  df-fv 6365  df-riota 7116  df-ov 7161  df-oprab 7162  df-mpo 7163  df-om 7583  df-1st 7691  df-2nd 7692  df-tpos 7894  df-wrecs 7949  df-recs 8010  df-rdg 8048  df-er 8291  df-en 8512  df-dom 8513  df-sdom 8514  df-pnf 10679  df-mnf 10680  df-xr 10681  df-ltxr 10682  df-le 10683  df-sub 10874  df-neg 10875  df-nn 11641  df-2 11703  df-3 11704  df-ndx 16488  df-slot 16489  df-base 16491  df-sets 16492  df-ress 16493  df-plusg 16580  df-mulr 16581  df-0g 16717  df-mgm 17854  df-sgrp 17903  df-mnd 17914  df-grp 18108  df-minusg 18109  df-mgp 19242  df-ur 19254  df-ring 19301  df-oppr 19375  df-dvdsr 19393  df-unit 19394  df-invr 19424  df-dvr 19435  df-drng 19506

This theorem is referenced by:  drngmgp  19516  isdrngd  19529  subdrgint  19584