Theorem 2idlcpblrng 21232

Description: The coset equivalence relation for a two-sided ideal is compatible with ring multiplication. (Contributed by Mario Carneiro, 14-Jun-2015.) Generalization for non-unital rings and two-sided ideals which are subgroups of the additive group of the non-unital ring. (Revised by AV, 23-Feb-2025.)

Hypotheses

Ref	Expression
2idlcpblrng.x	⊢ 𝑋 = (Base‘𝑅)
2idlcpblrng.r	⊢ 𝐸 = (𝑅 ~QG 𝑆)
2idlcpblrng.i	⊢ 𝐼 = (2Ideal‘𝑅)
2idlcpblrng.t	⊢ · = (.r‘𝑅)

Assertion

Ref	Expression
2idlcpblrng	⊢ ((𝑅 ∈ Rng ∧ 𝑆 ∈ 𝐼 ∧ 𝑆 ∈ (SubGrp‘𝑅)) → ((𝐴𝐸𝐶 ∧ 𝐵𝐸𝐷) → (𝐴 · 𝐵)𝐸(𝐶 · 𝐷)))

Proof of Theorem 2idlcpblrng

Step	Hyp	Ref	Expression
1		simpl1 1192	. . . 4 ⊢ (((𝑅 ∈ Rng ∧ 𝑆 ∈ 𝐼 ∧ 𝑆 ∈ (SubGrp‘𝑅)) ∧ (𝐴𝐸𝐶 ∧ 𝐵𝐸𝐷)) → 𝑅 ∈ Rng)
2		simpl3 1194	. . . . . . . 8 ⊢ (((𝑅 ∈ Rng ∧ 𝑆 ∈ 𝐼 ∧ 𝑆 ∈ (SubGrp‘𝑅)) ∧ (𝐴𝐸𝐶 ∧ 𝐵𝐸𝐷)) → 𝑆 ∈ (SubGrp‘𝑅))
3		2idlcpblrng.x	. . . . . . . . 9 ⊢ 𝑋 = (Base‘𝑅)
4		2idlcpblrng.r	. . . . . . . . 9 ⊢ 𝐸 = (𝑅 ~QG 𝑆)
5	3, 4	eqger 19161	. . . . . . . 8 ⊢ (𝑆 ∈ (SubGrp‘𝑅) → 𝐸 Er 𝑋)
6	2, 5	syl 17	. . . . . . 7 ⊢ (((𝑅 ∈ Rng ∧ 𝑆 ∈ 𝐼 ∧ 𝑆 ∈ (SubGrp‘𝑅)) ∧ (𝐴𝐸𝐶 ∧ 𝐵𝐸𝐷)) → 𝐸 Er 𝑋)
7		simprl 770	. . . . . . 7 ⊢ (((𝑅 ∈ Rng ∧ 𝑆 ∈ 𝐼 ∧ 𝑆 ∈ (SubGrp‘𝑅)) ∧ (𝐴𝐸𝐶 ∧ 𝐵𝐸𝐷)) → 𝐴𝐸𝐶)
8	6, 7	ersym 8731	. . . . . 6 ⊢ (((𝑅 ∈ Rng ∧ 𝑆 ∈ 𝐼 ∧ 𝑆 ∈ (SubGrp‘𝑅)) ∧ (𝐴𝐸𝐶 ∧ 𝐵𝐸𝐷)) → 𝐶𝐸𝐴)
9		rngabl 20115	. . . . . . . 8 ⊢ (𝑅 ∈ Rng → 𝑅 ∈ Abel)
10	9	3ad2ant1 1133	. . . . . . 7 ⊢ ((𝑅 ∈ Rng ∧ 𝑆 ∈ 𝐼 ∧ 𝑆 ∈ (SubGrp‘𝑅)) → 𝑅 ∈ Abel)
11		eqid 2735	. . . . . . . . . . . 12 ⊢ (LIdeal‘𝑅) = (LIdeal‘𝑅)
12		eqid 2735	. . . . . . . . . . . 12 ⊢ (oppr‘𝑅) = (oppr‘𝑅)
13		eqid 2735	. . . . . . . . . . . 12 ⊢ (LIdeal‘(oppr‘𝑅)) = (LIdeal‘(oppr‘𝑅))
14		2idlcpblrng.i	. . . . . . . . . . . 12 ⊢ 𝐼 = (2Ideal‘𝑅)
15	11, 12, 13, 14	2idlelb 21214	. . . . . . . . . . 11 ⊢ (𝑆 ∈ 𝐼 ↔ (𝑆 ∈ (LIdeal‘𝑅) ∧ 𝑆 ∈ (LIdeal‘(oppr‘𝑅))))
16	15	simplbi 497	. . . . . . . . . 10 ⊢ (𝑆 ∈ 𝐼 → 𝑆 ∈ (LIdeal‘𝑅))
17	16	3ad2ant2 1134	. . . . . . . . 9 ⊢ ((𝑅 ∈ Rng ∧ 𝑆 ∈ 𝐼 ∧ 𝑆 ∈ (SubGrp‘𝑅)) → 𝑆 ∈ (LIdeal‘𝑅))
18	17	adantr 480	. . . . . . . 8 ⊢ (((𝑅 ∈ Rng ∧ 𝑆 ∈ 𝐼 ∧ 𝑆 ∈ (SubGrp‘𝑅)) ∧ (𝐴𝐸𝐶 ∧ 𝐵𝐸𝐷)) → 𝑆 ∈ (LIdeal‘𝑅))
19	3, 11	lidlss 21173	. . . . . . . 8 ⊢ (𝑆 ∈ (LIdeal‘𝑅) → 𝑆 ⊆ 𝑋)
20	18, 19	syl 17	. . . . . . 7 ⊢ (((𝑅 ∈ Rng ∧ 𝑆 ∈ 𝐼 ∧ 𝑆 ∈ (SubGrp‘𝑅)) ∧ (𝐴𝐸𝐶 ∧ 𝐵𝐸𝐷)) → 𝑆 ⊆ 𝑋)
21		eqid 2735	. . . . . . . 8 ⊢ (-g‘𝑅) = (-g‘𝑅)
22	3, 21, 4	eqgabl 19815	. . . . . . 7 ⊢ ((𝑅 ∈ Abel ∧ 𝑆 ⊆ 𝑋) → (𝐶𝐸𝐴 ↔ (𝐶 ∈ 𝑋 ∧ 𝐴 ∈ 𝑋 ∧ (𝐴(-g‘𝑅)𝐶) ∈ 𝑆)))
23	10, 20, 22	syl2an2r 685	. . . . . 6 ⊢ (((𝑅 ∈ Rng ∧ 𝑆 ∈ 𝐼 ∧ 𝑆 ∈ (SubGrp‘𝑅)) ∧ (𝐴𝐸𝐶 ∧ 𝐵𝐸𝐷)) → (𝐶𝐸𝐴 ↔ (𝐶 ∈ 𝑋 ∧ 𝐴 ∈ 𝑋 ∧ (𝐴(-g‘𝑅)𝐶) ∈ 𝑆)))
24	8, 23	mpbid 232	. . . . 5 ⊢ (((𝑅 ∈ Rng ∧ 𝑆 ∈ 𝐼 ∧ 𝑆 ∈ (SubGrp‘𝑅)) ∧ (𝐴𝐸𝐶 ∧ 𝐵𝐸𝐷)) → (𝐶 ∈ 𝑋 ∧ 𝐴 ∈ 𝑋 ∧ (𝐴(-g‘𝑅)𝐶) ∈ 𝑆))
25	24	simp2d 1143	. . . 4 ⊢ (((𝑅 ∈ Rng ∧ 𝑆 ∈ 𝐼 ∧ 𝑆 ∈ (SubGrp‘𝑅)) ∧ (𝐴𝐸𝐶 ∧ 𝐵𝐸𝐷)) → 𝐴 ∈ 𝑋)
26		simprr 772	. . . . . 6 ⊢ (((𝑅 ∈ Rng ∧ 𝑆 ∈ 𝐼 ∧ 𝑆 ∈ (SubGrp‘𝑅)) ∧ (𝐴𝐸𝐶 ∧ 𝐵𝐸𝐷)) → 𝐵𝐸𝐷)
27	3, 21, 4	eqgabl 19815	. . . . . . 7 ⊢ ((𝑅 ∈ Abel ∧ 𝑆 ⊆ 𝑋) → (𝐵𝐸𝐷 ↔ (𝐵 ∈ 𝑋 ∧ 𝐷 ∈ 𝑋 ∧ (𝐷(-g‘𝑅)𝐵) ∈ 𝑆)))
28	10, 20, 27	syl2an2r 685	. . . . . 6 ⊢ (((𝑅 ∈ Rng ∧ 𝑆 ∈ 𝐼 ∧ 𝑆 ∈ (SubGrp‘𝑅)) ∧ (𝐴𝐸𝐶 ∧ 𝐵𝐸𝐷)) → (𝐵𝐸𝐷 ↔ (𝐵 ∈ 𝑋 ∧ 𝐷 ∈ 𝑋 ∧ (𝐷(-g‘𝑅)𝐵) ∈ 𝑆)))
29	26, 28	mpbid 232	. . . . 5 ⊢ (((𝑅 ∈ Rng ∧ 𝑆 ∈ 𝐼 ∧ 𝑆 ∈ (SubGrp‘𝑅)) ∧ (𝐴𝐸𝐶 ∧ 𝐵𝐸𝐷)) → (𝐵 ∈ 𝑋 ∧ 𝐷 ∈ 𝑋 ∧ (𝐷(-g‘𝑅)𝐵) ∈ 𝑆))
30	29	simp1d 1142	. . . 4 ⊢ (((𝑅 ∈ Rng ∧ 𝑆 ∈ 𝐼 ∧ 𝑆 ∈ (SubGrp‘𝑅)) ∧ (𝐴𝐸𝐶 ∧ 𝐵𝐸𝐷)) → 𝐵 ∈ 𝑋)
31		2idlcpblrng.t	. . . . 5 ⊢ · = (.r‘𝑅)
32	3, 31	rngcl 20124	. . . 4 ⊢ ((𝑅 ∈ Rng ∧ 𝐴 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → (𝐴 · 𝐵) ∈ 𝑋)
33	1, 25, 30, 32	syl3anc 1373	. . 3 ⊢ (((𝑅 ∈ Rng ∧ 𝑆 ∈ 𝐼 ∧ 𝑆 ∈ (SubGrp‘𝑅)) ∧ (𝐴𝐸𝐶 ∧ 𝐵𝐸𝐷)) → (𝐴 · 𝐵) ∈ 𝑋)
34	24	simp1d 1142	. . . 4 ⊢ (((𝑅 ∈ Rng ∧ 𝑆 ∈ 𝐼 ∧ 𝑆 ∈ (SubGrp‘𝑅)) ∧ (𝐴𝐸𝐶 ∧ 𝐵𝐸𝐷)) → 𝐶 ∈ 𝑋)
35	29	simp2d 1143	. . . 4 ⊢ (((𝑅 ∈ Rng ∧ 𝑆 ∈ 𝐼 ∧ 𝑆 ∈ (SubGrp‘𝑅)) ∧ (𝐴𝐸𝐶 ∧ 𝐵𝐸𝐷)) → 𝐷 ∈ 𝑋)
36	3, 31	rngcl 20124	. . . 4 ⊢ ((𝑅 ∈ Rng ∧ 𝐶 ∈ 𝑋 ∧ 𝐷 ∈ 𝑋) → (𝐶 · 𝐷) ∈ 𝑋)
37	1, 34, 35, 36	syl3anc 1373	. . 3 ⊢ (((𝑅 ∈ Rng ∧ 𝑆 ∈ 𝐼 ∧ 𝑆 ∈ (SubGrp‘𝑅)) ∧ (𝐴𝐸𝐶 ∧ 𝐵𝐸𝐷)) → (𝐶 · 𝐷) ∈ 𝑋)
38		rnggrp 20118	. . . . . . 7 ⊢ (𝑅 ∈ Rng → 𝑅 ∈ Grp)
39	38	3ad2ant1 1133	. . . . . 6 ⊢ ((𝑅 ∈ Rng ∧ 𝑆 ∈ 𝐼 ∧ 𝑆 ∈ (SubGrp‘𝑅)) → 𝑅 ∈ Grp)
40	39	adantr 480	. . . . 5 ⊢ (((𝑅 ∈ Rng ∧ 𝑆 ∈ 𝐼 ∧ 𝑆 ∈ (SubGrp‘𝑅)) ∧ (𝐴𝐸𝐶 ∧ 𝐵𝐸𝐷)) → 𝑅 ∈ Grp)
41	3, 31	rngcl 20124	. . . . . 6 ⊢ ((𝑅 ∈ Rng ∧ 𝐶 ∈ 𝑋 ∧ 𝐵 ∈ 𝑋) → (𝐶 · 𝐵) ∈ 𝑋)
42	1, 34, 30, 41	syl3anc 1373	. . . . 5 ⊢ (((𝑅 ∈ Rng ∧ 𝑆 ∈ 𝐼 ∧ 𝑆 ∈ (SubGrp‘𝑅)) ∧ (𝐴𝐸𝐶 ∧ 𝐵𝐸𝐷)) → (𝐶 · 𝐵) ∈ 𝑋)
43	3, 21	grpnnncan2 19020	. . . . 5 ⊢ ((𝑅 ∈ Grp ∧ ((𝐶 · 𝐷) ∈ 𝑋 ∧ (𝐴 · 𝐵) ∈ 𝑋 ∧ (𝐶 · 𝐵) ∈ 𝑋)) → (((𝐶 · 𝐷)(-g‘𝑅)(𝐶 · 𝐵))(-g‘𝑅)((𝐴 · 𝐵)(-g‘𝑅)(𝐶 · 𝐵))) = ((𝐶 · 𝐷)(-g‘𝑅)(𝐴 · 𝐵)))
44	40, 37, 33, 42, 43	syl13anc 1374	. . . 4 ⊢ (((𝑅 ∈ Rng ∧ 𝑆 ∈ 𝐼 ∧ 𝑆 ∈ (SubGrp‘𝑅)) ∧ (𝐴𝐸𝐶 ∧ 𝐵𝐸𝐷)) → (((𝐶 · 𝐷)(-g‘𝑅)(𝐶 · 𝐵))(-g‘𝑅)((𝐴 · 𝐵)(-g‘𝑅)(𝐶 · 𝐵))) = ((𝐶 · 𝐷)(-g‘𝑅)(𝐴 · 𝐵)))
45	3, 31, 21, 1, 34, 35, 30	rngsubdi 20131	. . . . . 6 ⊢ (((𝑅 ∈ Rng ∧ 𝑆 ∈ 𝐼 ∧ 𝑆 ∈ (SubGrp‘𝑅)) ∧ (𝐴𝐸𝐶 ∧ 𝐵𝐸𝐷)) → (𝐶 · (𝐷(-g‘𝑅)𝐵)) = ((𝐶 · 𝐷)(-g‘𝑅)(𝐶 · 𝐵)))
46		eqid 2735	. . . . . . . . . 10 ⊢ (0g‘𝑅) = (0g‘𝑅)
47	46	subg0cl 19117	. . . . . . . . 9 ⊢ (𝑆 ∈ (SubGrp‘𝑅) → (0g‘𝑅) ∈ 𝑆)
48	47	3ad2ant3 1135	. . . . . . . 8 ⊢ ((𝑅 ∈ Rng ∧ 𝑆 ∈ 𝐼 ∧ 𝑆 ∈ (SubGrp‘𝑅)) → (0g‘𝑅) ∈ 𝑆)
49	48	adantr 480	. . . . . . 7 ⊢ (((𝑅 ∈ Rng ∧ 𝑆 ∈ 𝐼 ∧ 𝑆 ∈ (SubGrp‘𝑅)) ∧ (𝐴𝐸𝐶 ∧ 𝐵𝐸𝐷)) → (0g‘𝑅) ∈ 𝑆)
50	29	simp3d 1144	. . . . . . 7 ⊢ (((𝑅 ∈ Rng ∧ 𝑆 ∈ 𝐼 ∧ 𝑆 ∈ (SubGrp‘𝑅)) ∧ (𝐴𝐸𝐶 ∧ 𝐵𝐸𝐷)) → (𝐷(-g‘𝑅)𝐵) ∈ 𝑆)
51	46, 3, 31, 11	rnglidlmcl 21177	. . . . . . 7 ⊢ (((𝑅 ∈ Rng ∧ 𝑆 ∈ (LIdeal‘𝑅) ∧ (0g‘𝑅) ∈ 𝑆) ∧ (𝐶 ∈ 𝑋 ∧ (𝐷(-g‘𝑅)𝐵) ∈ 𝑆)) → (𝐶 · (𝐷(-g‘𝑅)𝐵)) ∈ 𝑆)
52	1, 18, 49, 34, 50, 51	syl32anc 1380	. . . . . 6 ⊢ (((𝑅 ∈ Rng ∧ 𝑆 ∈ 𝐼 ∧ 𝑆 ∈ (SubGrp‘𝑅)) ∧ (𝐴𝐸𝐶 ∧ 𝐵𝐸𝐷)) → (𝐶 · (𝐷(-g‘𝑅)𝐵)) ∈ 𝑆)
53	45, 52	eqeltrrd 2835	. . . . 5 ⊢ (((𝑅 ∈ Rng ∧ 𝑆 ∈ 𝐼 ∧ 𝑆 ∈ (SubGrp‘𝑅)) ∧ (𝐴𝐸𝐶 ∧ 𝐵𝐸𝐷)) → ((𝐶 · 𝐷)(-g‘𝑅)(𝐶 · 𝐵)) ∈ 𝑆)
54		eqid 2735	. . . . . . . 8 ⊢ (.r‘(oppr‘𝑅)) = (.r‘(oppr‘𝑅))
55	3, 31, 12, 54	opprmul 20300	. . . . . . 7 ⊢ (𝐵(.r‘(oppr‘𝑅))(𝐴(-g‘𝑅)𝐶)) = ((𝐴(-g‘𝑅)𝐶) · 𝐵)
56	3, 31, 21, 1, 25, 34, 30	rngsubdir 20132	. . . . . . 7 ⊢ (((𝑅 ∈ Rng ∧ 𝑆 ∈ 𝐼 ∧ 𝑆 ∈ (SubGrp‘𝑅)) ∧ (𝐴𝐸𝐶 ∧ 𝐵𝐸𝐷)) → ((𝐴(-g‘𝑅)𝐶) · 𝐵) = ((𝐴 · 𝐵)(-g‘𝑅)(𝐶 · 𝐵)))
57	55, 56	eqtrid 2782	. . . . . 6 ⊢ (((𝑅 ∈ Rng ∧ 𝑆 ∈ 𝐼 ∧ 𝑆 ∈ (SubGrp‘𝑅)) ∧ (𝐴𝐸𝐶 ∧ 𝐵𝐸𝐷)) → (𝐵(.r‘(oppr‘𝑅))(𝐴(-g‘𝑅)𝐶)) = ((𝐴 · 𝐵)(-g‘𝑅)(𝐶 · 𝐵)))
58	12	opprrng 20305	. . . . . . . . 9 ⊢ (𝑅 ∈ Rng → (oppr‘𝑅) ∈ Rng)
59	58	3ad2ant1 1133	. . . . . . . 8 ⊢ ((𝑅 ∈ Rng ∧ 𝑆 ∈ 𝐼 ∧ 𝑆 ∈ (SubGrp‘𝑅)) → (oppr‘𝑅) ∈ Rng)
60	59	adantr 480	. . . . . . 7 ⊢ (((𝑅 ∈ Rng ∧ 𝑆 ∈ 𝐼 ∧ 𝑆 ∈ (SubGrp‘𝑅)) ∧ (𝐴𝐸𝐶 ∧ 𝐵𝐸𝐷)) → (oppr‘𝑅) ∈ Rng)
61	15	simprbi 496	. . . . . . . . 9 ⊢ (𝑆 ∈ 𝐼 → 𝑆 ∈ (LIdeal‘(oppr‘𝑅)))
62	61	3ad2ant2 1134	. . . . . . . 8 ⊢ ((𝑅 ∈ Rng ∧ 𝑆 ∈ 𝐼 ∧ 𝑆 ∈ (SubGrp‘𝑅)) → 𝑆 ∈ (LIdeal‘(oppr‘𝑅)))
63	62	adantr 480	. . . . . . 7 ⊢ (((𝑅 ∈ Rng ∧ 𝑆 ∈ 𝐼 ∧ 𝑆 ∈ (SubGrp‘𝑅)) ∧ (𝐴𝐸𝐶 ∧ 𝐵𝐸𝐷)) → 𝑆 ∈ (LIdeal‘(oppr‘𝑅)))
64	24	simp3d 1144	. . . . . . 7 ⊢ (((𝑅 ∈ Rng ∧ 𝑆 ∈ 𝐼 ∧ 𝑆 ∈ (SubGrp‘𝑅)) ∧ (𝐴𝐸𝐶 ∧ 𝐵𝐸𝐷)) → (𝐴(-g‘𝑅)𝐶) ∈ 𝑆)
65	12, 46	oppr0 20309	. . . . . . . 8 ⊢ (0g‘𝑅) = (0g‘(oppr‘𝑅))
66	12, 3	opprbas 20303	. . . . . . . 8 ⊢ 𝑋 = (Base‘(oppr‘𝑅))
67	65, 66, 54, 13	rnglidlmcl 21177	. . . . . . 7 ⊢ ((((oppr‘𝑅) ∈ Rng ∧ 𝑆 ∈ (LIdeal‘(oppr‘𝑅)) ∧ (0g‘𝑅) ∈ 𝑆) ∧ (𝐵 ∈ 𝑋 ∧ (𝐴(-g‘𝑅)𝐶) ∈ 𝑆)) → (𝐵(.r‘(oppr‘𝑅))(𝐴(-g‘𝑅)𝐶)) ∈ 𝑆)
68	60, 63, 49, 30, 64, 67	syl32anc 1380	. . . . . 6 ⊢ (((𝑅 ∈ Rng ∧ 𝑆 ∈ 𝐼 ∧ 𝑆 ∈ (SubGrp‘𝑅)) ∧ (𝐴𝐸𝐶 ∧ 𝐵𝐸𝐷)) → (𝐵(.r‘(oppr‘𝑅))(𝐴(-g‘𝑅)𝐶)) ∈ 𝑆)
69	57, 68	eqeltrrd 2835	. . . . 5 ⊢ (((𝑅 ∈ Rng ∧ 𝑆 ∈ 𝐼 ∧ 𝑆 ∈ (SubGrp‘𝑅)) ∧ (𝐴𝐸𝐶 ∧ 𝐵𝐸𝐷)) → ((𝐴 · 𝐵)(-g‘𝑅)(𝐶 · 𝐵)) ∈ 𝑆)
70	21	subgsubcl 19120	. . . . 5 ⊢ ((𝑆 ∈ (SubGrp‘𝑅) ∧ ((𝐶 · 𝐷)(-g‘𝑅)(𝐶 · 𝐵)) ∈ 𝑆 ∧ ((𝐴 · 𝐵)(-g‘𝑅)(𝐶 · 𝐵)) ∈ 𝑆) → (((𝐶 · 𝐷)(-g‘𝑅)(𝐶 · 𝐵))(-g‘𝑅)((𝐴 · 𝐵)(-g‘𝑅)(𝐶 · 𝐵))) ∈ 𝑆)
71	2, 53, 69, 70	syl3anc 1373	. . . 4 ⊢ (((𝑅 ∈ Rng ∧ 𝑆 ∈ 𝐼 ∧ 𝑆 ∈ (SubGrp‘𝑅)) ∧ (𝐴𝐸𝐶 ∧ 𝐵𝐸𝐷)) → (((𝐶 · 𝐷)(-g‘𝑅)(𝐶 · 𝐵))(-g‘𝑅)((𝐴 · 𝐵)(-g‘𝑅)(𝐶 · 𝐵))) ∈ 𝑆)
72	44, 71	eqeltrrd 2835	. . 3 ⊢ (((𝑅 ∈ Rng ∧ 𝑆 ∈ 𝐼 ∧ 𝑆 ∈ (SubGrp‘𝑅)) ∧ (𝐴𝐸𝐶 ∧ 𝐵𝐸𝐷)) → ((𝐶 · 𝐷)(-g‘𝑅)(𝐴 · 𝐵)) ∈ 𝑆)
73	3, 21, 4	eqgabl 19815	. . . 4 ⊢ ((𝑅 ∈ Abel ∧ 𝑆 ⊆ 𝑋) → ((𝐴 · 𝐵)𝐸(𝐶 · 𝐷) ↔ ((𝐴 · 𝐵) ∈ 𝑋 ∧ (𝐶 · 𝐷) ∈ 𝑋 ∧ ((𝐶 · 𝐷)(-g‘𝑅)(𝐴 · 𝐵)) ∈ 𝑆)))
74	10, 20, 73	syl2an2r 685	. . 3 ⊢ (((𝑅 ∈ Rng ∧ 𝑆 ∈ 𝐼 ∧ 𝑆 ∈ (SubGrp‘𝑅)) ∧ (𝐴𝐸𝐶 ∧ 𝐵𝐸𝐷)) → ((𝐴 · 𝐵)𝐸(𝐶 · 𝐷) ↔ ((𝐴 · 𝐵) ∈ 𝑋 ∧ (𝐶 · 𝐷) ∈ 𝑋 ∧ ((𝐶 · 𝐷)(-g‘𝑅)(𝐴 · 𝐵)) ∈ 𝑆)))
75	33, 37, 72, 74	mpbir3and 1343	. 2 ⊢ (((𝑅 ∈ Rng ∧ 𝑆 ∈ 𝐼 ∧ 𝑆 ∈ (SubGrp‘𝑅)) ∧ (𝐴𝐸𝐶 ∧ 𝐵𝐸𝐷)) → (𝐴 · 𝐵)𝐸(𝐶 · 𝐷))
76	75	ex 412	1 ⊢ ((𝑅 ∈ Rng ∧ 𝑆 ∈ 𝐼 ∧ 𝑆 ∈ (SubGrp‘𝑅)) → ((𝐴𝐸𝐶 ∧ 𝐵𝐸𝐷) → (𝐴 · 𝐵)𝐸(𝐶 · 𝐷)))

Syntax hints:   → wi 4   ↔ wb 206   ∧ wa 395   ∧ w3a 1086   = wceq 1540   ∈ wcel 2108   ⊆ wss 3926   class class class wbr 5119  ‘cfv 6531  (class class class)co 7405   Er wer 8716  Basecbs 17228  ._rcmulr 17272  0_gc0g 17453  Grpcgrp 18916  -_gcsg 18918  SubGrpcsubg 19103   ~_QG cqg 19105  Abelcabl 19762  Rngcrng 20112  opp_rcoppr 20296  LIdealclidl 21167  2Idealc2idl 21210

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1795  ax-4 1809  ax-5 1910  ax-6 1967  ax-7 2007  ax-8 2110  ax-9 2118  ax-10 2141  ax-11 2157  ax-12 2177  ax-ext 2707  ax-rep 5249  ax-sep 5266  ax-nul 5276  ax-pow 5335  ax-pr 5402  ax-un 7729  ax-cnex 11185  ax-resscn 11186  ax-1cn 11187  ax-icn 11188  ax-addcl 11189  ax-addrcl 11190  ax-mulcl 11191  ax-mulrcl 11192  ax-mulcom 11193  ax-addass 11194  ax-mulass 11195  ax-distr 11196  ax-i2m1 11197  ax-1ne0 11198  ax-1rid 11199  ax-rnegex 11200  ax-rrecex 11201  ax-cnre 11202  ax-pre-lttri 11203  ax-pre-lttrn 11204  ax-pre-ltadd 11205  ax-pre-mulgt0 11206

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-3or 1087  df-3an 1088  df-tru 1543  df-fal 1553  df-ex 1780  df-nf 1784  df-sb 2065  df-mo 2539  df-eu 2568  df-clab 2714  df-cleq 2727  df-clel 2809  df-nfc 2885  df-ne 2933  df-nel 3037  df-ral 3052  df-rex 3061  df-rmo 3359  df-reu 3360  df-rab 3416  df-v 3461  df-sbc 3766  df-csb 3875  df-dif 3929  df-un 3931  df-in 3933  df-ss 3943  df-pss 3946  df-nul 4309  df-if 4501  df-pw 4577  df-sn 4602  df-pr 4604  df-op 4608  df-uni 4884  df-iun 4969  df-br 5120  df-opab 5182  df-mpt 5202  df-tr 5230  df-id 5548  df-eprel 5553  df-po 5561  df-so 5562  df-fr 5606  df-we 5608  df-xp 5660  df-rel 5661  df-cnv 5662  df-co 5663  df-dm 5664  df-rn 5665  df-res 5666  df-ima 5667  df-pred 6290  df-ord 6355  df-on 6356  df-lim 6357  df-suc 6358  df-iota 6484  df-fun 6533  df-fn 6534  df-f 6535  df-f1 6536  df-fo 6537  df-f1o 6538  df-fv 6539  df-riota 7362  df-ov 7408  df-oprab 7409  df-mpo 7410  df-om 7862  df-1st 7988  df-2nd 7989  df-tpos 8225  df-frecs 8280  df-wrecs 8311  df-recs 8385  df-rdg 8424  df-er 8719  df-en 8960  df-dom 8961  df-sdom 8962  df-pnf 11271  df-mnf 11272  df-xr 11273  df-ltxr 11274  df-le 11275  df-sub 11468  df-neg 11469  df-nn 12241  df-2 12303  df-3 12304  df-4 12305  df-5 12306  df-6 12307  df-7 12308  df-8 12309  df-sets 17183  df-slot 17201  df-ndx 17213  df-base 17229  df-ress 17252  df-plusg 17284  df-mulr 17285  df-sca 17287  df-vsca 17288  df-ip 17289  df-0g 17455  df-mgm 18618  df-sgrp 18697  df-mnd 18713  df-grp 18919  df-minusg 18920  df-sbg 18921  df-subg 19106  df-eqg 19108  df-cmn 19763  df-abl 19764  df-mgp 20101  df-rng 20113  df-oppr 20297  df-lss 20889  df-sra 21131  df-rgmod 21132  df-lidl 21169  df-2idl 21211

This theorem is referenced by:  2idlcpbl  21233  qus2idrng  21234  qusmulrng  21243