Theorem erler 33819

Description: The relation used to build the ring localization is an equivalence relation. (Contributed by Thierry Arnoux, 4-May-2025.)

Hypotheses

Ref	Expression
erler.1	⊢ 𝐵 = (Base‘𝑅)
erler.2	⊢ 0 = (0g‘𝑅)
erler.3	⊢ 1 = (1r‘𝑅)
erler.4	⊢ · = (.r‘𝑅)
erler.5	⊢ − = (-g‘𝑅)
erler.w	⊢ 𝑊 = (𝐵 × 𝑆)
erler.q	⊢ ∼ = (𝑅 ~RL 𝑆)
erler.r	⊢ (𝜑 → 𝑅 ∈ CRing)
erler.s	⊢ (𝜑 → 𝑆 ∈ (SubMnd‘(mulGrp‘𝑅)))

Assertion

Ref	Expression
erler	⊢ (𝜑 → ∼ Er 𝑊)

Proof of Theorem erler

Dummy variables 𝑎 𝑏 𝑡 𝑢 𝑥 𝑦 𝑧 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		eqid 2761	. . . . 5 ⊢ {⟨𝑎, 𝑏⟩ ∣ ((𝑎 ∈ 𝑊 ∧ 𝑏 ∈ 𝑊) ∧ ∃𝑡 ∈ 𝑆 (𝑡 · (((1st ‘𝑎) · (2nd ‘𝑏)) − ((1st ‘𝑏) · (2nd ‘𝑎)))) = 0 )} = {⟨𝑎, 𝑏⟩ ∣ ((𝑎 ∈ 𝑊 ∧ 𝑏 ∈ 𝑊) ∧ ∃𝑡 ∈ 𝑆 (𝑡 · (((1st ‘𝑎) · (2nd ‘𝑏)) − ((1st ‘𝑏) · (2nd ‘𝑎)))) = 0 )}
2	1	relopabiv 5798	. . . 4 ⊢ Rel {⟨𝑎, 𝑏⟩ ∣ ((𝑎 ∈ 𝑊 ∧ 𝑏 ∈ 𝑊) ∧ ∃𝑡 ∈ 𝑆 (𝑡 · (((1st ‘𝑎) · (2nd ‘𝑏)) − ((1st ‘𝑏) · (2nd ‘𝑎)))) = 0 )}
3	2	a1i 11	. . 3 ⊢ (𝜑 → Rel {⟨𝑎, 𝑏⟩ ∣ ((𝑎 ∈ 𝑊 ∧ 𝑏 ∈ 𝑊) ∧ ∃𝑡 ∈ 𝑆 (𝑡 · (((1st ‘𝑎) · (2nd ‘𝑏)) − ((1st ‘𝑏) · (2nd ‘𝑎)))) = 0 )})
4		erler.q	. . . . 5 ⊢ ∼ = (𝑅 ~RL 𝑆)
5		erler.1	. . . . . 6 ⊢ 𝐵 = (Base‘𝑅)
6		erler.2	. . . . . 6 ⊢ 0 = (0g‘𝑅)
7		erler.4	. . . . . 6 ⊢ · = (.r‘𝑅)
8		erler.5	. . . . . 6 ⊢ − = (-g‘𝑅)
9		erler.w	. . . . . 6 ⊢ 𝑊 = (𝐵 × 𝑆)
10		erler.s	. . . . . . 7 ⊢ (𝜑 → 𝑆 ∈ (SubMnd‘(mulGrp‘𝑅)))
11		eqid 2761	. . . . . . . . 9 ⊢ (mulGrp‘𝑅) = (mulGrp‘𝑅)
12	11, 5	mgpbas 20358	. . . . . . . 8 ⊢ 𝐵 = (Base‘(mulGrp‘𝑅))
13	12	submss 18997	. . . . . . 7 ⊢ (𝑆 ∈ (SubMnd‘(mulGrp‘𝑅)) → 𝑆 ⊆ 𝐵)
14	10, 13	syl 18	. . . . . 6 ⊢ (𝜑 → 𝑆 ⊆ 𝐵)
15	5, 6, 7, 8, 9, 1, 14	erlval 33812	. . . . 5 ⊢ (𝜑 → (𝑅 ~RL 𝑆) = {⟨𝑎, 𝑏⟩ ∣ ((𝑎 ∈ 𝑊 ∧ 𝑏 ∈ 𝑊) ∧ ∃𝑡 ∈ 𝑆 (𝑡 · (((1st ‘𝑎) · (2nd ‘𝑏)) − ((1st ‘𝑏) · (2nd ‘𝑎)))) = 0 )})
16	4, 15	eqtrid 2808	. . . 4 ⊢ (𝜑 → ∼ = {⟨𝑎, 𝑏⟩ ∣ ((𝑎 ∈ 𝑊 ∧ 𝑏 ∈ 𝑊) ∧ ∃𝑡 ∈ 𝑆 (𝑡 · (((1st ‘𝑎) · (2nd ‘𝑏)) − ((1st ‘𝑏) · (2nd ‘𝑎)))) = 0 )})
17	16	releqd 5755	. . 3 ⊢ (𝜑 → (Rel ∼ ↔ Rel {⟨𝑎, 𝑏⟩ ∣ ((𝑎 ∈ 𝑊 ∧ 𝑏 ∈ 𝑊) ∧ ∃𝑡 ∈ 𝑆 (𝑡 · (((1st ‘𝑎) · (2nd ‘𝑏)) − ((1st ‘𝑏) · (2nd ‘𝑎)))) = 0 )}))
18	3, 17	mpbird 260	. 2 ⊢ (𝜑 → Rel ∼ )
19		simpl 488	. . . . . . . . . . . . . . 15 ⊢ ((𝑎 = 𝑥 ∧ 𝑏 = 𝑦) → 𝑎 = 𝑥)
20	19	fveq2d 6887	. . . . . . . . . . . . . 14 ⊢ ((𝑎 = 𝑥 ∧ 𝑏 = 𝑦) → (1st ‘𝑎) = (1st ‘𝑥))
21		simpr 490	. . . . . . . . . . . . . . 15 ⊢ ((𝑎 = 𝑥 ∧ 𝑏 = 𝑦) → 𝑏 = 𝑦)
22	21	fveq2d 6887	. . . . . . . . . . . . . 14 ⊢ ((𝑎 = 𝑥 ∧ 𝑏 = 𝑦) → (2nd ‘𝑏) = (2nd ‘𝑦))
23	20, 22	oveq12d 7436	. . . . . . . . . . . . 13 ⊢ ((𝑎 = 𝑥 ∧ 𝑏 = 𝑦) → ((1st ‘𝑎) · (2nd ‘𝑏)) = ((1st ‘𝑥) · (2nd ‘𝑦)))
24	21	fveq2d 6887	. . . . . . . . . . . . . 14 ⊢ ((𝑎 = 𝑥 ∧ 𝑏 = 𝑦) → (1st ‘𝑏) = (1st ‘𝑦))
25	19	fveq2d 6887	. . . . . . . . . . . . . 14 ⊢ ((𝑎 = 𝑥 ∧ 𝑏 = 𝑦) → (2nd ‘𝑎) = (2nd ‘𝑥))
26	24, 25	oveq12d 7436	. . . . . . . . . . . . 13 ⊢ ((𝑎 = 𝑥 ∧ 𝑏 = 𝑦) → ((1st ‘𝑏) · (2nd ‘𝑎)) = ((1st ‘𝑦) · (2nd ‘𝑥)))
27	23, 26	oveq12d 7436	. . . . . . . . . . . 12 ⊢ ((𝑎 = 𝑥 ∧ 𝑏 = 𝑦) → (((1st ‘𝑎) · (2nd ‘𝑏)) − ((1st ‘𝑏) · (2nd ‘𝑎))) = (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥))))
28	27	oveq2d 7434	. . . . . . . . . . 11 ⊢ ((𝑎 = 𝑥 ∧ 𝑏 = 𝑦) → (𝑡 · (((1st ‘𝑎) · (2nd ‘𝑏)) − ((1st ‘𝑏) · (2nd ‘𝑎)))) = (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))))
29	28	eqeq1d 2763	. . . . . . . . . 10 ⊢ ((𝑎 = 𝑥 ∧ 𝑏 = 𝑦) → ((𝑡 · (((1st ‘𝑎) · (2nd ‘𝑏)) − ((1st ‘𝑏) · (2nd ‘𝑎)))) = 0 ↔ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ))
30	29	rexbidv 3187	. . . . . . . . 9 ⊢ ((𝑎 = 𝑥 ∧ 𝑏 = 𝑦) → (∃𝑡 ∈ 𝑆 (𝑡 · (((1st ‘𝑎) · (2nd ‘𝑏)) − ((1st ‘𝑏) · (2nd ‘𝑎)))) = 0 ↔ ∃𝑡 ∈ 𝑆 (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ))
31	30	adantl 487	. . . . . . . 8 ⊢ ((𝜑 ∧ (𝑎 = 𝑥 ∧ 𝑏 = 𝑦)) → (∃𝑡 ∈ 𝑆 (𝑡 · (((1st ‘𝑎) · (2nd ‘𝑏)) − ((1st ‘𝑏) · (2nd ‘𝑎)))) = 0 ↔ ∃𝑡 ∈ 𝑆 (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ))
32	16, 31	brab2d 5512	. . . . . . 7 ⊢ (𝜑 → (𝑥 ∼ 𝑦 ↔ ((𝑥 ∈ 𝑊 ∧ 𝑦 ∈ 𝑊) ∧ ∃𝑡 ∈ 𝑆 (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 )))
33	32	biimpa 482	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∼ 𝑦) → ((𝑥 ∈ 𝑊 ∧ 𝑦 ∈ 𝑊) ∧ ∃𝑡 ∈ 𝑆 (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ))
34	33	simplrd 782	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∼ 𝑦) → 𝑦 ∈ 𝑊)
35	33	simplld 780	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∼ 𝑦) → 𝑥 ∈ 𝑊)
36	34, 35	jca 521	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∼ 𝑦) → (𝑦 ∈ 𝑊 ∧ 𝑥 ∈ 𝑊))
37	33	simprd 501	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∼ 𝑦) → ∃𝑡 ∈ 𝑆 (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 )
38		erler.r	. . . . . . . . . . . . 13 ⊢ (𝜑 → 𝑅 ∈ CRing)
39	38	crngringd 20466	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝑅 ∈ Ring)
40	39	ringgrpd 20462	. . . . . . . . . . 11 ⊢ (𝜑 → 𝑅 ∈ Grp)
41	40	ad3antrrr 743	. . . . . . . . . 10 ⊢ ((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) → 𝑅 ∈ Grp)
42	39	ad3antrrr 743	. . . . . . . . . . 11 ⊢ ((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) → 𝑅 ∈ Ring)
43	35	ad2antrr 739	. . . . . . . . . . . 12 ⊢ ((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) → 𝑥 ∈ 𝑊)
44		xp1st 8031	. . . . . . . . . . . . 13 ⊢ (𝑥 ∈ (𝐵 × 𝑆) → (1st ‘𝑥) ∈ 𝐵)
45	44, 9	eleq2s 2879	. . . . . . . . . . . 12 ⊢ (𝑥 ∈ 𝑊 → (1st ‘𝑥) ∈ 𝐵)
46	43, 45	syl 18	. . . . . . . . . . 11 ⊢ ((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) → (1st ‘𝑥) ∈ 𝐵)
47	14	ad3antrrr 743	. . . . . . . . . . . 12 ⊢ ((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) → 𝑆 ⊆ 𝐵)
48	34	ad2antrr 739	. . . . . . . . . . . . 13 ⊢ ((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) → 𝑦 ∈ 𝑊)
49		xp2nd 8032	. . . . . . . . . . . . . 14 ⊢ (𝑦 ∈ (𝐵 × 𝑆) → (2nd ‘𝑦) ∈ 𝑆)
50	49, 9	eleq2s 2879	. . . . . . . . . . . . 13 ⊢ (𝑦 ∈ 𝑊 → (2nd ‘𝑦) ∈ 𝑆)
51	48, 50	syl 18	. . . . . . . . . . . 12 ⊢ ((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) → (2nd ‘𝑦) ∈ 𝑆)
52	47, 51	sseldd 3932	. . . . . . . . . . 11 ⊢ ((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) → (2nd ‘𝑦) ∈ 𝐵)
53	5, 7, 42, 46, 52	ringcld 20477	. . . . . . . . . 10 ⊢ ((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) → ((1st ‘𝑥) · (2nd ‘𝑦)) ∈ 𝐵)
54		xp1st 8031	. . . . . . . . . . . . 13 ⊢ (𝑦 ∈ (𝐵 × 𝑆) → (1st ‘𝑦) ∈ 𝐵)
55	54, 9	eleq2s 2879	. . . . . . . . . . . 12 ⊢ (𝑦 ∈ 𝑊 → (1st ‘𝑦) ∈ 𝐵)
56	48, 55	syl 18	. . . . . . . . . . 11 ⊢ ((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) → (1st ‘𝑦) ∈ 𝐵)
57		xp2nd 8032	. . . . . . . . . . . . . 14 ⊢ (𝑥 ∈ (𝐵 × 𝑆) → (2nd ‘𝑥) ∈ 𝑆)
58	57, 9	eleq2s 2879	. . . . . . . . . . . . 13 ⊢ (𝑥 ∈ 𝑊 → (2nd ‘𝑥) ∈ 𝑆)
59	43, 58	syl 18	. . . . . . . . . . . 12 ⊢ ((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) → (2nd ‘𝑥) ∈ 𝑆)
60	47, 59	sseldd 3932	. . . . . . . . . . 11 ⊢ ((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) → (2nd ‘𝑥) ∈ 𝐵)
61	5, 7, 42, 56, 60	ringcld 20477	. . . . . . . . . 10 ⊢ ((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) → ((1st ‘𝑦) · (2nd ‘𝑥)) ∈ 𝐵)
62		eqid 2761	. . . . . . . . . . 11 ⊢ (invg‘𝑅) = (invg‘𝑅)
63	5, 8, 62	grpinvsub 19225	. . . . . . . . . 10 ⊢ ((𝑅 ∈ Grp ∧ ((1st ‘𝑥) · (2nd ‘𝑦)) ∈ 𝐵 ∧ ((1st ‘𝑦) · (2nd ‘𝑥)) ∈ 𝐵) → ((invg‘𝑅)‘(((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = (((1st ‘𝑦) · (2nd ‘𝑥)) − ((1st ‘𝑥) · (2nd ‘𝑦))))
64	41, 53, 61, 63	syl3anc 1398	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) → ((invg‘𝑅)‘(((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = (((1st ‘𝑦) · (2nd ‘𝑥)) − ((1st ‘𝑥) · (2nd ‘𝑦))))
65	64	oveq2d 7434	. . . . . . . 8 ⊢ ((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) → (𝑡 · ((invg‘𝑅)‘(((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥))))) = (𝑡 · (((1st ‘𝑦) · (2nd ‘𝑥)) − ((1st ‘𝑥) · (2nd ‘𝑦)))))
66		simplr 781	. . . . . . . . . . 11 ⊢ ((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) → 𝑡 ∈ 𝑆)
67	47, 66	sseldd 3932	. . . . . . . . . 10 ⊢ ((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) → 𝑡 ∈ 𝐵)
68	5, 8	grpsubcl 19223	. . . . . . . . . . 11 ⊢ ((𝑅 ∈ Grp ∧ ((1st ‘𝑥) · (2nd ‘𝑦)) ∈ 𝐵 ∧ ((1st ‘𝑦) · (2nd ‘𝑥)) ∈ 𝐵) → (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥))) ∈ 𝐵)
69	41, 53, 61, 68	syl3anc 1398	. . . . . . . . . 10 ⊢ ((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) → (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥))) ∈ 𝐵)
70	5, 7, 62, 42, 67, 69	ringmneg2 20529	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) → (𝑡 · ((invg‘𝑅)‘(((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥))))) = ((invg‘𝑅)‘(𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥))))))
71		simpr 490	. . . . . . . . . 10 ⊢ ((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) → (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 )
72	71	fveq2d 6887	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) → ((invg‘𝑅)‘(𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥))))) = ((invg‘𝑅)‘ 0 ))
73	6, 62	grpinvid 19203	. . . . . . . . . 10 ⊢ (𝑅 ∈ Grp → ((invg‘𝑅)‘ 0 ) = 0 )
74	41, 73	syl 18	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) → ((invg‘𝑅)‘ 0 ) = 0 )
75	70, 72, 74	3eqtrd 2800	. . . . . . . 8 ⊢ ((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) → (𝑡 · ((invg‘𝑅)‘(((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥))))) = 0 )
76	65, 75	eqtr3d 2798	. . . . . . 7 ⊢ ((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) → (𝑡 · (((1st ‘𝑦) · (2nd ‘𝑥)) − ((1st ‘𝑥) · (2nd ‘𝑦)))) = 0 )
77	76	ex 418	. . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑡 ∈ 𝑆) → ((𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 → (𝑡 · (((1st ‘𝑦) · (2nd ‘𝑥)) − ((1st ‘𝑥) · (2nd ‘𝑦)))) = 0 ))
78	77	reximdva 3176	. . . . 5 ⊢ ((𝜑 ∧ 𝑥 ∼ 𝑦) → (∃𝑡 ∈ 𝑆 (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 → ∃𝑡 ∈ 𝑆 (𝑡 · (((1st ‘𝑦) · (2nd ‘𝑥)) − ((1st ‘𝑥) · (2nd ‘𝑦)))) = 0 ))
79	37, 78	mpd 16	. . . 4 ⊢ ((𝜑 ∧ 𝑥 ∼ 𝑦) → ∃𝑡 ∈ 𝑆 (𝑡 · (((1st ‘𝑦) · (2nd ‘𝑥)) − ((1st ‘𝑥) · (2nd ‘𝑦)))) = 0 )
80	36, 79	jca 521	. . 3 ⊢ ((𝜑 ∧ 𝑥 ∼ 𝑦) → ((𝑦 ∈ 𝑊 ∧ 𝑥 ∈ 𝑊) ∧ ∃𝑡 ∈ 𝑆 (𝑡 · (((1st ‘𝑦) · (2nd ‘𝑥)) − ((1st ‘𝑥) · (2nd ‘𝑦)))) = 0 ))
81		simpl 488	. . . . . . . . . . . 12 ⊢ ((𝑎 = 𝑦 ∧ 𝑏 = 𝑥) → 𝑎 = 𝑦)
82	81	fveq2d 6887	. . . . . . . . . . 11 ⊢ ((𝑎 = 𝑦 ∧ 𝑏 = 𝑥) → (1st ‘𝑎) = (1st ‘𝑦))
83		simpr 490	. . . . . . . . . . . 12 ⊢ ((𝑎 = 𝑦 ∧ 𝑏 = 𝑥) → 𝑏 = 𝑥)
84	83	fveq2d 6887	. . . . . . . . . . 11 ⊢ ((𝑎 = 𝑦 ∧ 𝑏 = 𝑥) → (2nd ‘𝑏) = (2nd ‘𝑥))
85	82, 84	oveq12d 7436	. . . . . . . . . 10 ⊢ ((𝑎 = 𝑦 ∧ 𝑏 = 𝑥) → ((1st ‘𝑎) · (2nd ‘𝑏)) = ((1st ‘𝑦) · (2nd ‘𝑥)))
86	83	fveq2d 6887	. . . . . . . . . . 11 ⊢ ((𝑎 = 𝑦 ∧ 𝑏 = 𝑥) → (1st ‘𝑏) = (1st ‘𝑥))
87	81	fveq2d 6887	. . . . . . . . . . 11 ⊢ ((𝑎 = 𝑦 ∧ 𝑏 = 𝑥) → (2nd ‘𝑎) = (2nd ‘𝑦))
88	86, 87	oveq12d 7436	. . . . . . . . . 10 ⊢ ((𝑎 = 𝑦 ∧ 𝑏 = 𝑥) → ((1st ‘𝑏) · (2nd ‘𝑎)) = ((1st ‘𝑥) · (2nd ‘𝑦)))
89	85, 88	oveq12d 7436	. . . . . . . . 9 ⊢ ((𝑎 = 𝑦 ∧ 𝑏 = 𝑥) → (((1st ‘𝑎) · (2nd ‘𝑏)) − ((1st ‘𝑏) · (2nd ‘𝑎))) = (((1st ‘𝑦) · (2nd ‘𝑥)) − ((1st ‘𝑥) · (2nd ‘𝑦))))
90	89	oveq2d 7434	. . . . . . . 8 ⊢ ((𝑎 = 𝑦 ∧ 𝑏 = 𝑥) → (𝑡 · (((1st ‘𝑎) · (2nd ‘𝑏)) − ((1st ‘𝑏) · (2nd ‘𝑎)))) = (𝑡 · (((1st ‘𝑦) · (2nd ‘𝑥)) − ((1st ‘𝑥) · (2nd ‘𝑦)))))
91	90	eqeq1d 2763	. . . . . . 7 ⊢ ((𝑎 = 𝑦 ∧ 𝑏 = 𝑥) → ((𝑡 · (((1st ‘𝑎) · (2nd ‘𝑏)) − ((1st ‘𝑏) · (2nd ‘𝑎)))) = 0 ↔ (𝑡 · (((1st ‘𝑦) · (2nd ‘𝑥)) − ((1st ‘𝑥) · (2nd ‘𝑦)))) = 0 ))
92	91	rexbidv 3187	. . . . . 6 ⊢ ((𝑎 = 𝑦 ∧ 𝑏 = 𝑥) → (∃𝑡 ∈ 𝑆 (𝑡 · (((1st ‘𝑎) · (2nd ‘𝑏)) − ((1st ‘𝑏) · (2nd ‘𝑎)))) = 0 ↔ ∃𝑡 ∈ 𝑆 (𝑡 · (((1st ‘𝑦) · (2nd ‘𝑥)) − ((1st ‘𝑥) · (2nd ‘𝑦)))) = 0 ))
93	92	adantl 487	. . . . 5 ⊢ ((𝜑 ∧ (𝑎 = 𝑦 ∧ 𝑏 = 𝑥)) → (∃𝑡 ∈ 𝑆 (𝑡 · (((1st ‘𝑎) · (2nd ‘𝑏)) − ((1st ‘𝑏) · (2nd ‘𝑎)))) = 0 ↔ ∃𝑡 ∈ 𝑆 (𝑡 · (((1st ‘𝑦) · (2nd ‘𝑥)) − ((1st ‘𝑥) · (2nd ‘𝑦)))) = 0 ))
94	16, 93	brab2d 5512	. . . 4 ⊢ (𝜑 → (𝑦 ∼ 𝑥 ↔ ((𝑦 ∈ 𝑊 ∧ 𝑥 ∈ 𝑊) ∧ ∃𝑡 ∈ 𝑆 (𝑡 · (((1st ‘𝑦) · (2nd ‘𝑥)) − ((1st ‘𝑥) · (2nd ‘𝑦)))) = 0 )))
95	94	adantr 486	. . 3 ⊢ ((𝜑 ∧ 𝑥 ∼ 𝑦) → (𝑦 ∼ 𝑥 ↔ ((𝑦 ∈ 𝑊 ∧ 𝑥 ∈ 𝑊) ∧ ∃𝑡 ∈ 𝑆 (𝑡 · (((1st ‘𝑦) · (2nd ‘𝑥)) − ((1st ‘𝑥) · (2nd ‘𝑦)))) = 0 )))
96	80, 95	mpbird 260	. 2 ⊢ ((𝜑 ∧ 𝑥 ∼ 𝑦) → 𝑦 ∼ 𝑥)
97	10	ad6antr 749	. . . . . . 7 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → 𝑆 ∈ (SubMnd‘(mulGrp‘𝑅)))
98	97, 13	syl 18	. . . . . 6 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → 𝑆 ⊆ 𝐵)
99	35	adantr 486	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) → 𝑥 ∈ 𝑊)
100	99	ad4antr 745	. . . . . . . 8 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → 𝑥 ∈ 𝑊)
101	100, 9	eleqtrdi 2871	. . . . . . 7 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → 𝑥 ∈ (𝐵 × 𝑆))
102		1st2nd2 8038	. . . . . . 7 ⊢ (𝑥 ∈ (𝐵 × 𝑆) → 𝑥 = ⟨(1st ‘𝑥), (2nd ‘𝑥)⟩)
103	101, 102	syl 18	. . . . . 6 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → 𝑥 = ⟨(1st ‘𝑥), (2nd ‘𝑥)⟩)
104		simpl 488	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((𝑎 = 𝑦 ∧ 𝑏 = 𝑧) → 𝑎 = 𝑦)
105	104	fveq2d 6887	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝑎 = 𝑦 ∧ 𝑏 = 𝑧) → (1st ‘𝑎) = (1st ‘𝑦))
106		simpr 490	. . . . . . . . . . . . . . . . . . . . 21 ⊢ ((𝑎 = 𝑦 ∧ 𝑏 = 𝑧) → 𝑏 = 𝑧)
107	106	fveq2d 6887	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝑎 = 𝑦 ∧ 𝑏 = 𝑧) → (2nd ‘𝑏) = (2nd ‘𝑧))
108	105, 107	oveq12d 7436	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝑎 = 𝑦 ∧ 𝑏 = 𝑧) → ((1st ‘𝑎) · (2nd ‘𝑏)) = ((1st ‘𝑦) · (2nd ‘𝑧)))
109	106	fveq2d 6887	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝑎 = 𝑦 ∧ 𝑏 = 𝑧) → (1st ‘𝑏) = (1st ‘𝑧))
110	104	fveq2d 6887	. . . . . . . . . . . . . . . . . . . 20 ⊢ ((𝑎 = 𝑦 ∧ 𝑏 = 𝑧) → (2nd ‘𝑎) = (2nd ‘𝑦))
111	109, 110	oveq12d 7436	. . . . . . . . . . . . . . . . . . 19 ⊢ ((𝑎 = 𝑦 ∧ 𝑏 = 𝑧) → ((1st ‘𝑏) · (2nd ‘𝑎)) = ((1st ‘𝑧) · (2nd ‘𝑦)))
112	108, 111	oveq12d 7436	. . . . . . . . . . . . . . . . . 18 ⊢ ((𝑎 = 𝑦 ∧ 𝑏 = 𝑧) → (((1st ‘𝑎) · (2nd ‘𝑏)) − ((1st ‘𝑏) · (2nd ‘𝑎))) = (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦))))
113	112	oveq2d 7434	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑎 = 𝑦 ∧ 𝑏 = 𝑧) → (𝑡 · (((1st ‘𝑎) · (2nd ‘𝑏)) − ((1st ‘𝑏) · (2nd ‘𝑎)))) = (𝑡 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))))
114	113	eqeq1d 2763	. . . . . . . . . . . . . . . 16 ⊢ ((𝑎 = 𝑦 ∧ 𝑏 = 𝑧) → ((𝑡 · (((1st ‘𝑎) · (2nd ‘𝑏)) − ((1st ‘𝑏) · (2nd ‘𝑎)))) = 0 ↔ (𝑡 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ))
115	114	rexbidv 3187	. . . . . . . . . . . . . . 15 ⊢ ((𝑎 = 𝑦 ∧ 𝑏 = 𝑧) → (∃𝑡 ∈ 𝑆 (𝑡 · (((1st ‘𝑎) · (2nd ‘𝑏)) − ((1st ‘𝑏) · (2nd ‘𝑎)))) = 0 ↔ ∃𝑡 ∈ 𝑆 (𝑡 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ))
116		oveq1 7425	. . . . . . . . . . . . . . . . 17 ⊢ (𝑡 = 𝑢 → (𝑡 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))))
117	116	eqeq1d 2763	. . . . . . . . . . . . . . . 16 ⊢ (𝑡 = 𝑢 → ((𝑡 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ↔ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ))
118	117	cbvrexvw 3242	. . . . . . . . . . . . . . 15 ⊢ (∃𝑡 ∈ 𝑆 (𝑡 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ↔ ∃𝑢 ∈ 𝑆 (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 )
119	115, 118	bitrdi 290	. . . . . . . . . . . . . 14 ⊢ ((𝑎 = 𝑦 ∧ 𝑏 = 𝑧) → (∃𝑡 ∈ 𝑆 (𝑡 · (((1st ‘𝑎) · (2nd ‘𝑏)) − ((1st ‘𝑏) · (2nd ‘𝑎)))) = 0 ↔ ∃𝑢 ∈ 𝑆 (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ))
120	119	adantl 487	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ (𝑎 = 𝑦 ∧ 𝑏 = 𝑧)) → (∃𝑡 ∈ 𝑆 (𝑡 · (((1st ‘𝑎) · (2nd ‘𝑏)) − ((1st ‘𝑏) · (2nd ‘𝑎)))) = 0 ↔ ∃𝑢 ∈ 𝑆 (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ))
121	16, 120	brab2d 5512	. . . . . . . . . . . 12 ⊢ (𝜑 → (𝑦 ∼ 𝑧 ↔ ((𝑦 ∈ 𝑊 ∧ 𝑧 ∈ 𝑊) ∧ ∃𝑢 ∈ 𝑆 (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 )))
122	121	biimpa 482	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑦 ∼ 𝑧) → ((𝑦 ∈ 𝑊 ∧ 𝑧 ∈ 𝑊) ∧ ∃𝑢 ∈ 𝑆 (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ))
123	122	adantlr 728	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) → ((𝑦 ∈ 𝑊 ∧ 𝑧 ∈ 𝑊) ∧ ∃𝑢 ∈ 𝑆 (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ))
124	123	simplrd 782	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) → 𝑧 ∈ 𝑊)
125	124	ad4antr 745	. . . . . . . 8 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → 𝑧 ∈ 𝑊)
126	125, 9	eleqtrdi 2871	. . . . . . 7 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → 𝑧 ∈ (𝐵 × 𝑆))
127		1st2nd2 8038	. . . . . . 7 ⊢ (𝑧 ∈ (𝐵 × 𝑆) → 𝑧 = ⟨(1st ‘𝑧), (2nd ‘𝑧)⟩)
128	126, 127	syl 18	. . . . . 6 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → 𝑧 = ⟨(1st ‘𝑧), (2nd ‘𝑧)⟩)
129	100, 45	syl 18	. . . . . 6 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → (1st ‘𝑥) ∈ 𝐵)
130		xp1st 8031	. . . . . . . 8 ⊢ (𝑧 ∈ (𝐵 × 𝑆) → (1st ‘𝑧) ∈ 𝐵)
131	130, 9	eleq2s 2879	. . . . . . 7 ⊢ (𝑧 ∈ 𝑊 → (1st ‘𝑧) ∈ 𝐵)
132	125, 131	syl 18	. . . . . 6 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → (1st ‘𝑧) ∈ 𝐵)
133	100, 58	syl 18	. . . . . 6 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → (2nd ‘𝑥) ∈ 𝑆)
134		xp2nd 8032	. . . . . . . 8 ⊢ (𝑧 ∈ (𝐵 × 𝑆) → (2nd ‘𝑧) ∈ 𝑆)
135	134, 9	eleq2s 2879	. . . . . . 7 ⊢ (𝑧 ∈ 𝑊 → (2nd ‘𝑧) ∈ 𝑆)
136	125, 135	syl 18	. . . . . 6 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → (2nd ‘𝑧) ∈ 𝑆)
137		simp-4r 796	. . . . . . . 8 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → 𝑡 ∈ 𝑆)
138		simplr 781	. . . . . . . 8 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → 𝑢 ∈ 𝑆)
139	11, 7	mgpplusg 20357	. . . . . . . . 9 ⊢ · = (+g‘(mulGrp‘𝑅))
140	139	submcl 19000	. . . . . . . 8 ⊢ ((𝑆 ∈ (SubMnd‘(mulGrp‘𝑅)) ∧ 𝑡 ∈ 𝑆 ∧ 𝑢 ∈ 𝑆) → (𝑡 · 𝑢) ∈ 𝑆)
141	97, 137, 138, 140	syl3anc 1398	. . . . . . 7 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → (𝑡 · 𝑢) ∈ 𝑆)
142	34	ad5antr 747	. . . . . . . 8 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → 𝑦 ∈ 𝑊)
143	142, 50	syl 18	. . . . . . 7 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → (2nd ‘𝑦) ∈ 𝑆)
144	139	submcl 19000	. . . . . . 7 ⊢ ((𝑆 ∈ (SubMnd‘(mulGrp‘𝑅)) ∧ (𝑡 · 𝑢) ∈ 𝑆 ∧ (2nd ‘𝑦) ∈ 𝑆) → ((𝑡 · 𝑢) · (2nd ‘𝑦)) ∈ 𝑆)
145	97, 141, 143, 144	syl3anc 1398	. . . . . 6 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((𝑡 · 𝑢) · (2nd ‘𝑦)) ∈ 𝑆)
146	39	ad6antr 749	. . . . . . . . . . 11 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → 𝑅 ∈ Ring)
147	98, 143	sseldd 3932	. . . . . . . . . . 11 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → (2nd ‘𝑦) ∈ 𝐵)
148	98, 136	sseldd 3932	. . . . . . . . . . . 12 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → (2nd ‘𝑧) ∈ 𝐵)
149	5, 7, 146, 129, 148	ringcld 20477	. . . . . . . . . . 11 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((1st ‘𝑥) · (2nd ‘𝑧)) ∈ 𝐵)
150	98, 133	sseldd 3932	. . . . . . . . . . . 12 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → (2nd ‘𝑥) ∈ 𝐵)
151	5, 7, 146, 132, 150	ringcld 20477	. . . . . . . . . . 11 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((1st ‘𝑧) · (2nd ‘𝑥)) ∈ 𝐵)
152	5, 7, 8, 146, 147, 149, 151	ringsubdi 20531	. . . . . . . . . 10 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((2nd ‘𝑦) · (((1st ‘𝑥) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑥)))) = (((2nd ‘𝑦) · ((1st ‘𝑥) · (2nd ‘𝑧))) − ((2nd ‘𝑦) · ((1st ‘𝑧) · (2nd ‘𝑥)))))
153	38	ad6antr 749	. . . . . . . . . . . . 13 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → 𝑅 ∈ CRing)
154	5, 7, 153, 147, 129, 148	crng12d 20479	. . . . . . . . . . . 12 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((2nd ‘𝑦) · ((1st ‘𝑥) · (2nd ‘𝑧))) = ((1st ‘𝑥) · ((2nd ‘𝑦) · (2nd ‘𝑧))))
155	5, 7, 153, 147, 148	crngcomd 20475	. . . . . . . . . . . . 13 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((2nd ‘𝑦) · (2nd ‘𝑧)) = ((2nd ‘𝑧) · (2nd ‘𝑦)))
156	155	oveq2d 7434	. . . . . . . . . . . 12 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((1st ‘𝑥) · ((2nd ‘𝑦) · (2nd ‘𝑧))) = ((1st ‘𝑥) · ((2nd ‘𝑧) · (2nd ‘𝑦))))
157	5, 7, 153, 129, 148, 147	crng12d 20479	. . . . . . . . . . . 12 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((1st ‘𝑥) · ((2nd ‘𝑧) · (2nd ‘𝑦))) = ((2nd ‘𝑧) · ((1st ‘𝑥) · (2nd ‘𝑦))))
158	154, 156, 157	3eqtrd 2800	. . . . . . . . . . 11 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((2nd ‘𝑦) · ((1st ‘𝑥) · (2nd ‘𝑧))) = ((2nd ‘𝑧) · ((1st ‘𝑥) · (2nd ‘𝑦))))
159	5, 7, 153, 147, 132, 150	crng12d 20479	. . . . . . . . . . . 12 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((2nd ‘𝑦) · ((1st ‘𝑧) · (2nd ‘𝑥))) = ((1st ‘𝑧) · ((2nd ‘𝑦) · (2nd ‘𝑥))))
160	5, 7, 153, 147, 150	crngcomd 20475	. . . . . . . . . . . . 13 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((2nd ‘𝑦) · (2nd ‘𝑥)) = ((2nd ‘𝑥) · (2nd ‘𝑦)))
161	160	oveq2d 7434	. . . . . . . . . . . 12 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((1st ‘𝑧) · ((2nd ‘𝑦) · (2nd ‘𝑥))) = ((1st ‘𝑧) · ((2nd ‘𝑥) · (2nd ‘𝑦))))
162	5, 7, 153, 132, 150, 147	crng12d 20479	. . . . . . . . . . . 12 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((1st ‘𝑧) · ((2nd ‘𝑥) · (2nd ‘𝑦))) = ((2nd ‘𝑥) · ((1st ‘𝑧) · (2nd ‘𝑦))))
163	159, 161, 162	3eqtrd 2800	. . . . . . . . . . 11 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((2nd ‘𝑦) · ((1st ‘𝑧) · (2nd ‘𝑥))) = ((2nd ‘𝑥) · ((1st ‘𝑧) · (2nd ‘𝑦))))
164	158, 163	oveq12d 7436	. . . . . . . . . 10 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → (((2nd ‘𝑦) · ((1st ‘𝑥) · (2nd ‘𝑧))) − ((2nd ‘𝑦) · ((1st ‘𝑧) · (2nd ‘𝑥)))) = (((2nd ‘𝑧) · ((1st ‘𝑥) · (2nd ‘𝑦))) − ((2nd ‘𝑥) · ((1st ‘𝑧) · (2nd ‘𝑦)))))
165	5, 7, 146, 129, 147	ringcld 20477	. . . . . . . . . . . . 13 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((1st ‘𝑥) · (2nd ‘𝑦)) ∈ 𝐵)
166	142, 55	syl 18	. . . . . . . . . . . . . 14 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → (1st ‘𝑦) ∈ 𝐵)
167	5, 7, 146, 166, 150	ringcld 20477	. . . . . . . . . . . . 13 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((1st ‘𝑦) · (2nd ‘𝑥)) ∈ 𝐵)
168	5, 7, 8, 146, 148, 165, 167	ringsubdi 20531	. . . . . . . . . . . 12 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((2nd ‘𝑧) · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = (((2nd ‘𝑧) · ((1st ‘𝑥) · (2nd ‘𝑦))) − ((2nd ‘𝑧) · ((1st ‘𝑦) · (2nd ‘𝑥)))))
169	5, 7, 146, 166, 148	ringcld 20477	. . . . . . . . . . . . 13 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((1st ‘𝑦) · (2nd ‘𝑧)) ∈ 𝐵)
170	5, 7, 146, 132, 147	ringcld 20477	. . . . . . . . . . . . 13 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((1st ‘𝑧) · (2nd ‘𝑦)) ∈ 𝐵)
171	5, 7, 8, 146, 150, 169, 170	ringsubdi 20531	. . . . . . . . . . . 12 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((2nd ‘𝑥) · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = (((2nd ‘𝑥) · ((1st ‘𝑦) · (2nd ‘𝑧))) − ((2nd ‘𝑥) · ((1st ‘𝑧) · (2nd ‘𝑦)))))
172	168, 171	oveq12d 7436	. . . . . . . . . . 11 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → (((2nd ‘𝑧) · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥))))(+g‘𝑅)((2nd ‘𝑥) · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦))))) = ((((2nd ‘𝑧) · ((1st ‘𝑥) · (2nd ‘𝑦))) − ((2nd ‘𝑧) · ((1st ‘𝑦) · (2nd ‘𝑥))))(+g‘𝑅)(((2nd ‘𝑥) · ((1st ‘𝑦) · (2nd ‘𝑧))) − ((2nd ‘𝑥) · ((1st ‘𝑧) · (2nd ‘𝑦))))))
173	5, 7, 153, 166, 148, 150	crng12d 20479	. . . . . . . . . . . . 13 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((1st ‘𝑦) · ((2nd ‘𝑧) · (2nd ‘𝑥))) = ((2nd ‘𝑧) · ((1st ‘𝑦) · (2nd ‘𝑥))))
174	173	oveq2d 7434	. . . . . . . . . . . 12 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → (((2nd ‘𝑧) · ((1st ‘𝑥) · (2nd ‘𝑦))) − ((1st ‘𝑦) · ((2nd ‘𝑧) · (2nd ‘𝑥)))) = (((2nd ‘𝑧) · ((1st ‘𝑥) · (2nd ‘𝑦))) − ((2nd ‘𝑧) · ((1st ‘𝑦) · (2nd ‘𝑥)))))
175	5, 7, 153, 148, 150	crngcomd 20475	. . . . . . . . . . . . . . 15 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((2nd ‘𝑧) · (2nd ‘𝑥)) = ((2nd ‘𝑥) · (2nd ‘𝑧)))
176	175	oveq2d 7434	. . . . . . . . . . . . . 14 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((1st ‘𝑦) · ((2nd ‘𝑧) · (2nd ‘𝑥))) = ((1st ‘𝑦) · ((2nd ‘𝑥) · (2nd ‘𝑧))))
177	5, 7, 153, 150, 166, 148	crng12d 20479	. . . . . . . . . . . . . 14 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((2nd ‘𝑥) · ((1st ‘𝑦) · (2nd ‘𝑧))) = ((1st ‘𝑦) · ((2nd ‘𝑥) · (2nd ‘𝑧))))
178	176, 177	eqtr4d 2799	. . . . . . . . . . . . 13 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((1st ‘𝑦) · ((2nd ‘𝑧) · (2nd ‘𝑥))) = ((2nd ‘𝑥) · ((1st ‘𝑦) · (2nd ‘𝑧))))
179	178	oveq1d 7433	. . . . . . . . . . . 12 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → (((1st ‘𝑦) · ((2nd ‘𝑧) · (2nd ‘𝑥))) − ((2nd ‘𝑥) · ((1st ‘𝑧) · (2nd ‘𝑦)))) = (((2nd ‘𝑥) · ((1st ‘𝑦) · (2nd ‘𝑧))) − ((2nd ‘𝑥) · ((1st ‘𝑧) · (2nd ‘𝑦)))))
180	174, 179	oveq12d 7436	. . . . . . . . . . 11 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((((2nd ‘𝑧) · ((1st ‘𝑥) · (2nd ‘𝑦))) − ((1st ‘𝑦) · ((2nd ‘𝑧) · (2nd ‘𝑥))))(+g‘𝑅)(((1st ‘𝑦) · ((2nd ‘𝑧) · (2nd ‘𝑥))) − ((2nd ‘𝑥) · ((1st ‘𝑧) · (2nd ‘𝑦))))) = ((((2nd ‘𝑧) · ((1st ‘𝑥) · (2nd ‘𝑦))) − ((2nd ‘𝑧) · ((1st ‘𝑦) · (2nd ‘𝑥))))(+g‘𝑅)(((2nd ‘𝑥) · ((1st ‘𝑦) · (2nd ‘𝑧))) − ((2nd ‘𝑥) · ((1st ‘𝑧) · (2nd ‘𝑦))))))
181	40	ad6antr 749	. . . . . . . . . . . 12 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → 𝑅 ∈ Grp)
182	5, 7, 146, 148, 165	ringcld 20477	. . . . . . . . . . . 12 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((2nd ‘𝑧) · ((1st ‘𝑥) · (2nd ‘𝑦))) ∈ 𝐵)
183	5, 7, 146, 148, 150	ringcld 20477	. . . . . . . . . . . . 13 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((2nd ‘𝑧) · (2nd ‘𝑥)) ∈ 𝐵)
184	5, 7, 146, 166, 183	ringcld 20477	. . . . . . . . . . . 12 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((1st ‘𝑦) · ((2nd ‘𝑧) · (2nd ‘𝑥))) ∈ 𝐵)
185	5, 7, 146, 150, 170	ringcld 20477	. . . . . . . . . . . 12 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((2nd ‘𝑥) · ((1st ‘𝑧) · (2nd ‘𝑦))) ∈ 𝐵)
186		eqid 2761	. . . . . . . . . . . . 13 ⊢ (+g‘𝑅) = (+g‘𝑅)
187	5, 186, 8	grpnpncan 19238	. . . . . . . . . . . 12 ⊢ ((𝑅 ∈ Grp ∧ (((2nd ‘𝑧) · ((1st ‘𝑥) · (2nd ‘𝑦))) ∈ 𝐵 ∧ ((1st ‘𝑦) · ((2nd ‘𝑧) · (2nd ‘𝑥))) ∈ 𝐵 ∧ ((2nd ‘𝑥) · ((1st ‘𝑧) · (2nd ‘𝑦))) ∈ 𝐵)) → ((((2nd ‘𝑧) · ((1st ‘𝑥) · (2nd ‘𝑦))) − ((1st ‘𝑦) · ((2nd ‘𝑧) · (2nd ‘𝑥))))(+g‘𝑅)(((1st ‘𝑦) · ((2nd ‘𝑧) · (2nd ‘𝑥))) − ((2nd ‘𝑥) · ((1st ‘𝑧) · (2nd ‘𝑦))))) = (((2nd ‘𝑧) · ((1st ‘𝑥) · (2nd ‘𝑦))) − ((2nd ‘𝑥) · ((1st ‘𝑧) · (2nd ‘𝑦)))))
188	181, 182, 184, 185, 187	syl13anc 1399	. . . . . . . . . . 11 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((((2nd ‘𝑧) · ((1st ‘𝑥) · (2nd ‘𝑦))) − ((1st ‘𝑦) · ((2nd ‘𝑧) · (2nd ‘𝑥))))(+g‘𝑅)(((1st ‘𝑦) · ((2nd ‘𝑧) · (2nd ‘𝑥))) − ((2nd ‘𝑥) · ((1st ‘𝑧) · (2nd ‘𝑦))))) = (((2nd ‘𝑧) · ((1st ‘𝑥) · (2nd ‘𝑦))) − ((2nd ‘𝑥) · ((1st ‘𝑧) · (2nd ‘𝑦)))))
189	172, 180, 188	3eqtr2rd 2803	. . . . . . . . . 10 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → (((2nd ‘𝑧) · ((1st ‘𝑥) · (2nd ‘𝑦))) − ((2nd ‘𝑥) · ((1st ‘𝑧) · (2nd ‘𝑦)))) = (((2nd ‘𝑧) · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥))))(+g‘𝑅)((2nd ‘𝑥) · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦))))))
190	152, 164, 189	3eqtrd 2800	. . . . . . . . 9 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((2nd ‘𝑦) · (((1st ‘𝑥) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑥)))) = (((2nd ‘𝑧) · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥))))(+g‘𝑅)((2nd ‘𝑥) · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦))))))
191	190	oveq2d 7434	. . . . . . . 8 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((𝑡 · 𝑢) · ((2nd ‘𝑦) · (((1st ‘𝑥) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑥))))) = ((𝑡 · 𝑢) · (((2nd ‘𝑧) · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥))))(+g‘𝑅)((2nd ‘𝑥) · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))))))
192	98, 141	sseldd 3932	. . . . . . . . 9 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → (𝑡 · 𝑢) ∈ 𝐵)
193	5, 8	grpsubcl 19223	. . . . . . . . . 10 ⊢ ((𝑅 ∈ Grp ∧ ((1st ‘𝑥) · (2nd ‘𝑧)) ∈ 𝐵 ∧ ((1st ‘𝑧) · (2nd ‘𝑥)) ∈ 𝐵) → (((1st ‘𝑥) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑥))) ∈ 𝐵)
194	181, 149, 151, 193	syl3anc 1398	. . . . . . . . 9 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → (((1st ‘𝑥) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑥))) ∈ 𝐵)
195	5, 7, 146, 192, 147, 194	ringassd 20478	. . . . . . . 8 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → (((𝑡 · 𝑢) · (2nd ‘𝑦)) · (((1st ‘𝑥) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑥)))) = ((𝑡 · 𝑢) · ((2nd ‘𝑦) · (((1st ‘𝑥) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑥))))))
196	98, 138	sseldd 3932	. . . . . . . . . . . . . 14 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → 𝑢 ∈ 𝐵)
197	98, 137	sseldd 3932	. . . . . . . . . . . . . 14 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → 𝑡 ∈ 𝐵)
198	5, 7, 153, 196, 148, 197	crng32d 20480	. . . . . . . . . . . . 13 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((𝑢 · (2nd ‘𝑧)) · 𝑡) = ((𝑢 · 𝑡) · (2nd ‘𝑧)))
199	5, 7, 153, 196, 197	crngcomd 20475	. . . . . . . . . . . . . 14 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → (𝑢 · 𝑡) = (𝑡 · 𝑢))
200	199	oveq1d 7433	. . . . . . . . . . . . 13 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((𝑢 · 𝑡) · (2nd ‘𝑧)) = ((𝑡 · 𝑢) · (2nd ‘𝑧)))
201	198, 200	eqtrd 2796	. . . . . . . . . . . 12 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((𝑢 · (2nd ‘𝑧)) · 𝑡) = ((𝑡 · 𝑢) · (2nd ‘𝑧)))
202	201	oveq1d 7433	. . . . . . . . . . 11 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → (((𝑢 · (2nd ‘𝑧)) · 𝑡) · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = (((𝑡 · 𝑢) · (2nd ‘𝑧)) · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))))
203	5, 7, 146, 196, 148	ringcld 20477	. . . . . . . . . . . 12 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → (𝑢 · (2nd ‘𝑧)) ∈ 𝐵)
204	181, 165, 167, 68	syl3anc 1398	. . . . . . . . . . . 12 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥))) ∈ 𝐵)
205	5, 7, 146, 203, 197, 204	ringassd 20478	. . . . . . . . . . 11 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → (((𝑢 · (2nd ‘𝑧)) · 𝑡) · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = ((𝑢 · (2nd ‘𝑧)) · (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥))))))
206	5, 7, 146, 192, 148, 204	ringassd 20478	. . . . . . . . . . 11 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → (((𝑡 · 𝑢) · (2nd ‘𝑧)) · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = ((𝑡 · 𝑢) · ((2nd ‘𝑧) · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥))))))
207	202, 205, 206	3eqtr3d 2804	. . . . . . . . . 10 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((𝑢 · (2nd ‘𝑧)) · (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥))))) = ((𝑡 · 𝑢) · ((2nd ‘𝑧) · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥))))))
208	5, 7, 153, 197, 150, 196	crng32d 20480	. . . . . . . . . . . 12 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((𝑡 · (2nd ‘𝑥)) · 𝑢) = ((𝑡 · 𝑢) · (2nd ‘𝑥)))
209	208	oveq1d 7433	. . . . . . . . . . 11 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → (((𝑡 · (2nd ‘𝑥)) · 𝑢) · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = (((𝑡 · 𝑢) · (2nd ‘𝑥)) · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))))
210	5, 7, 146, 197, 150	ringcld 20477	. . . . . . . . . . . 12 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → (𝑡 · (2nd ‘𝑥)) ∈ 𝐵)
211	5, 8	grpsubcl 19223	. . . . . . . . . . . . 13 ⊢ ((𝑅 ∈ Grp ∧ ((1st ‘𝑦) · (2nd ‘𝑧)) ∈ 𝐵 ∧ ((1st ‘𝑧) · (2nd ‘𝑦)) ∈ 𝐵) → (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦))) ∈ 𝐵)
212	181, 169, 170, 211	syl3anc 1398	. . . . . . . . . . . 12 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦))) ∈ 𝐵)
213	5, 7, 146, 210, 196, 212	ringassd 20478	. . . . . . . . . . 11 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → (((𝑡 · (2nd ‘𝑥)) · 𝑢) · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = ((𝑡 · (2nd ‘𝑥)) · (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦))))))
214	5, 7, 146, 192, 150, 212	ringassd 20478	. . . . . . . . . . 11 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → (((𝑡 · 𝑢) · (2nd ‘𝑥)) · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = ((𝑡 · 𝑢) · ((2nd ‘𝑥) · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦))))))
215	209, 213, 214	3eqtr3d 2804	. . . . . . . . . 10 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((𝑡 · (2nd ‘𝑥)) · (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦))))) = ((𝑡 · 𝑢) · ((2nd ‘𝑥) · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦))))))
216	207, 215	oveq12d 7436	. . . . . . . . 9 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → (((𝑢 · (2nd ‘𝑧)) · (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))))(+g‘𝑅)((𝑡 · (2nd ‘𝑥)) · (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))))) = (((𝑡 · 𝑢) · ((2nd ‘𝑧) · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))))(+g‘𝑅)((𝑡 · 𝑢) · ((2nd ‘𝑥) · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))))))
217	5, 7, 146, 148, 204	ringcld 20477	. . . . . . . . . 10 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((2nd ‘𝑧) · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) ∈ 𝐵)
218	5, 7, 146, 150, 212	ringcld 20477	. . . . . . . . . 10 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((2nd ‘𝑥) · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) ∈ 𝐵)
219	5, 186, 7	ringdi 20482	. . . . . . . . . 10 ⊢ ((𝑅 ∈ Ring ∧ ((𝑡 · 𝑢) ∈ 𝐵 ∧ ((2nd ‘𝑧) · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) ∈ 𝐵 ∧ ((2nd ‘𝑥) · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) ∈ 𝐵)) → ((𝑡 · 𝑢) · (((2nd ‘𝑧) · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥))))(+g‘𝑅)((2nd ‘𝑥) · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))))) = (((𝑡 · 𝑢) · ((2nd ‘𝑧) · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))))(+g‘𝑅)((𝑡 · 𝑢) · ((2nd ‘𝑥) · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))))))
220	146, 192, 217, 218, 219	syl13anc 1399	. . . . . . . . 9 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((𝑡 · 𝑢) · (((2nd ‘𝑧) · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥))))(+g‘𝑅)((2nd ‘𝑥) · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))))) = (((𝑡 · 𝑢) · ((2nd ‘𝑧) · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))))(+g‘𝑅)((𝑡 · 𝑢) · ((2nd ‘𝑥) · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))))))
221	216, 220	eqtr4d 2799	. . . . . . . 8 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → (((𝑢 · (2nd ‘𝑧)) · (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))))(+g‘𝑅)((𝑡 · (2nd ‘𝑥)) · (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))))) = ((𝑡 · 𝑢) · (((2nd ‘𝑧) · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥))))(+g‘𝑅)((2nd ‘𝑥) · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))))))
222	191, 195, 221	3eqtr4d 2806	. . . . . . 7 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → (((𝑡 · 𝑢) · (2nd ‘𝑦)) · (((1st ‘𝑥) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑥)))) = (((𝑢 · (2nd ‘𝑧)) · (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))))(+g‘𝑅)((𝑡 · (2nd ‘𝑥)) · (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))))))
223		simpllr 788	. . . . . . . . . 10 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 )
224	223	oveq2d 7434	. . . . . . . . 9 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((𝑢 · (2nd ‘𝑧)) · (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥))))) = ((𝑢 · (2nd ‘𝑧)) · 0 ))
225	5, 7, 6, 146, 203	ringrzd 20520	. . . . . . . . 9 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((𝑢 · (2nd ‘𝑧)) · 0 ) = 0 )
226	224, 225	eqtrd 2796	. . . . . . . 8 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((𝑢 · (2nd ‘𝑧)) · (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥))))) = 0 )
227		simpr 490	. . . . . . . . . 10 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 )
228	227	oveq2d 7434	. . . . . . . . 9 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((𝑡 · (2nd ‘𝑥)) · (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦))))) = ((𝑡 · (2nd ‘𝑥)) · 0 ))
229	5, 7, 6, 146, 210	ringrzd 20520	. . . . . . . . 9 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((𝑡 · (2nd ‘𝑥)) · 0 ) = 0 )
230	228, 229	eqtrd 2796	. . . . . . . 8 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ((𝑡 · (2nd ‘𝑥)) · (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦))))) = 0 )
231	226, 230	oveq12d 7436	. . . . . . 7 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → (((𝑢 · (2nd ‘𝑧)) · (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))))(+g‘𝑅)((𝑡 · (2nd ‘𝑥)) · (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))))) = ( 0 (+g‘𝑅) 0 ))
232	5, 6	grpidcl 19169	. . . . . . . . 9 ⊢ (𝑅 ∈ Grp → 0 ∈ 𝐵)
233	181, 232	syl 18	. . . . . . . 8 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → 0 ∈ 𝐵)
234	5, 186, 6, 181, 233	grplidd 19173	. . . . . . 7 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → ( 0 (+g‘𝑅) 0 ) = 0 )
235	222, 231, 234	3eqtrd 2800	. . . . . 6 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → (((𝑡 · 𝑢) · (2nd ‘𝑦)) · (((1st ‘𝑥) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑥)))) = 0 )
236	5, 4, 98, 6, 7, 8, 103, 128, 129, 132, 133, 136, 145, 235	erlbrd 33817	. . . . 5 ⊢ (((((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) ∧ 𝑢 ∈ 𝑆) ∧ (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 ) → 𝑥 ∼ 𝑧)
237	123	simprd 501	. . . . . 6 ⊢ (((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) → ∃𝑢 ∈ 𝑆 (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 )
238	237	ad2antrr 739	. . . . 5 ⊢ (((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) → ∃𝑢 ∈ 𝑆 (𝑢 · (((1st ‘𝑦) · (2nd ‘𝑧)) − ((1st ‘𝑧) · (2nd ‘𝑦)))) = 0 )
239	236, 238	r19.29a 3171	. . . 4 ⊢ (((((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) ∧ 𝑡 ∈ 𝑆) ∧ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 ) → 𝑥 ∼ 𝑧)
240	37	adantr 486	. . . 4 ⊢ (((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) → ∃𝑡 ∈ 𝑆 (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑦)) − ((1st ‘𝑦) · (2nd ‘𝑥)))) = 0 )
241	239, 240	r19.29a 3171	. . 3 ⊢ (((𝜑 ∧ 𝑥 ∼ 𝑦) ∧ 𝑦 ∼ 𝑧) → 𝑥 ∼ 𝑧)
242	241	anasss 472	. 2 ⊢ ((𝜑 ∧ (𝑥 ∼ 𝑦 ∧ 𝑦 ∼ 𝑧)) → 𝑥 ∼ 𝑧)
243		erler.3	. . . . . . . . . . 11 ⊢ 1 = (1r‘𝑅)
244	11, 243	ringidval 20402	. . . . . . . . . 10 ⊢ 1 = (0g‘(mulGrp‘𝑅))
245	244	subm0cl 18999	. . . . . . . . 9 ⊢ (𝑆 ∈ (SubMnd‘(mulGrp‘𝑅)) → 1 ∈ 𝑆)
246	10, 245	syl 18	. . . . . . . 8 ⊢ (𝜑 → 1 ∈ 𝑆)
247	246	adantr 486	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑊) → 1 ∈ 𝑆)
248		oveq1 7425	. . . . . . . . 9 ⊢ (𝑡 = 1 → (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑥)) − ((1st ‘𝑥) · (2nd ‘𝑥)))) = ( 1 · (((1st ‘𝑥) · (2nd ‘𝑥)) − ((1st ‘𝑥) · (2nd ‘𝑥)))))
249	248	eqeq1d 2763	. . . . . . . 8 ⊢ (𝑡 = 1 → ((𝑡 · (((1st ‘𝑥) · (2nd ‘𝑥)) − ((1st ‘𝑥) · (2nd ‘𝑥)))) = 0 ↔ ( 1 · (((1st ‘𝑥) · (2nd ‘𝑥)) − ((1st ‘𝑥) · (2nd ‘𝑥)))) = 0 ))
250	249	adantl 487	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑥 ∈ 𝑊) ∧ 𝑡 = 1 ) → ((𝑡 · (((1st ‘𝑥) · (2nd ‘𝑥)) − ((1st ‘𝑥) · (2nd ‘𝑥)))) = 0 ↔ ( 1 · (((1st ‘𝑥) · (2nd ‘𝑥)) − ((1st ‘𝑥) · (2nd ‘𝑥)))) = 0 ))
251	39	adantr 486	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑊) → 𝑅 ∈ Ring)
252	45	adantl 487	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑊) → (1st ‘𝑥) ∈ 𝐵)
253	14	adantr 486	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑊) → 𝑆 ⊆ 𝐵)
254	58	adantl 487	. . . . . . . . . . . 12 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑊) → (2nd ‘𝑥) ∈ 𝑆)
255	253, 254	sseldd 3932	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑊) → (2nd ‘𝑥) ∈ 𝐵)
256	5, 7, 251, 252, 255	ringcld 20477	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑊) → ((1st ‘𝑥) · (2nd ‘𝑥)) ∈ 𝐵)
257	5, 6, 8	grpsubid 19227	. . . . . . . . . 10 ⊢ ((𝑅 ∈ Grp ∧ ((1st ‘𝑥) · (2nd ‘𝑥)) ∈ 𝐵) → (((1st ‘𝑥) · (2nd ‘𝑥)) − ((1st ‘𝑥) · (2nd ‘𝑥))) = 0 )
258	40, 256, 257	syl2an2r 698	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑊) → (((1st ‘𝑥) · (2nd ‘𝑥)) − ((1st ‘𝑥) · (2nd ‘𝑥))) = 0 )
259	258	oveq2d 7434	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑊) → ( 1 · (((1st ‘𝑥) · (2nd ‘𝑥)) − ((1st ‘𝑥) · (2nd ‘𝑥)))) = ( 1 · 0 ))
260	40, 232	syl 18	. . . . . . . . . 10 ⊢ (𝜑 → 0 ∈ 𝐵)
261	5, 7, 243, 39, 260	ringlidmd 20494	. . . . . . . . 9 ⊢ (𝜑 → ( 1 · 0 ) = 0 )
262	261	adantr 486	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑊) → ( 1 · 0 ) = 0 )
263	259, 262	eqtrd 2796	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑊) → ( 1 · (((1st ‘𝑥) · (2nd ‘𝑥)) − ((1st ‘𝑥) · (2nd ‘𝑥)))) = 0 )
264	247, 250, 263	rspcedvd 3579	. . . . . 6 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝑊) → ∃𝑡 ∈ 𝑆 (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑥)) − ((1st ‘𝑥) · (2nd ‘𝑥)))) = 0 )
265	264	ex 418	. . . . 5 ⊢ (𝜑 → (𝑥 ∈ 𝑊 → ∃𝑡 ∈ 𝑆 (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑥)) − ((1st ‘𝑥) · (2nd ‘𝑥)))) = 0 ))
266	265	pm4.71d 571	. . . 4 ⊢ (𝜑 → (𝑥 ∈ 𝑊 ↔ (𝑥 ∈ 𝑊 ∧ ∃𝑡 ∈ 𝑆 (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑥)) − ((1st ‘𝑥) · (2nd ‘𝑥)))) = 0 )))
267		pm4.24 574	. . . . 5 ⊢ (𝑥 ∈ 𝑊 ↔ (𝑥 ∈ 𝑊 ∧ 𝑥 ∈ 𝑊))
268	267	anbi1i 636	. . . 4 ⊢ ((𝑥 ∈ 𝑊 ∧ ∃𝑡 ∈ 𝑆 (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑥)) − ((1st ‘𝑥) · (2nd ‘𝑥)))) = 0 ) ↔ ((𝑥 ∈ 𝑊 ∧ 𝑥 ∈ 𝑊) ∧ ∃𝑡 ∈ 𝑆 (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑥)) − ((1st ‘𝑥) · (2nd ‘𝑥)))) = 0 ))
269	266, 268	bitrdi 290	. . 3 ⊢ (𝜑 → (𝑥 ∈ 𝑊 ↔ ((𝑥 ∈ 𝑊 ∧ 𝑥 ∈ 𝑊) ∧ ∃𝑡 ∈ 𝑆 (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑥)) − ((1st ‘𝑥) · (2nd ‘𝑥)))) = 0 )))
270		simpl 488	. . . . . . . . . . 11 ⊢ ((𝑎 = 𝑥 ∧ 𝑏 = 𝑥) → 𝑎 = 𝑥)
271	270	fveq2d 6887	. . . . . . . . . 10 ⊢ ((𝑎 = 𝑥 ∧ 𝑏 = 𝑥) → (1st ‘𝑎) = (1st ‘𝑥))
272		simpr 490	. . . . . . . . . . 11 ⊢ ((𝑎 = 𝑥 ∧ 𝑏 = 𝑥) → 𝑏 = 𝑥)
273	272	fveq2d 6887	. . . . . . . . . 10 ⊢ ((𝑎 = 𝑥 ∧ 𝑏 = 𝑥) → (2nd ‘𝑏) = (2nd ‘𝑥))
274	271, 273	oveq12d 7436	. . . . . . . . 9 ⊢ ((𝑎 = 𝑥 ∧ 𝑏 = 𝑥) → ((1st ‘𝑎) · (2nd ‘𝑏)) = ((1st ‘𝑥) · (2nd ‘𝑥)))
275	272	fveq2d 6887	. . . . . . . . . 10 ⊢ ((𝑎 = 𝑥 ∧ 𝑏 = 𝑥) → (1st ‘𝑏) = (1st ‘𝑥))
276	270	fveq2d 6887	. . . . . . . . . 10 ⊢ ((𝑎 = 𝑥 ∧ 𝑏 = 𝑥) → (2nd ‘𝑎) = (2nd ‘𝑥))
277	275, 276	oveq12d 7436	. . . . . . . . 9 ⊢ ((𝑎 = 𝑥 ∧ 𝑏 = 𝑥) → ((1st ‘𝑏) · (2nd ‘𝑎)) = ((1st ‘𝑥) · (2nd ‘𝑥)))
278	274, 277	oveq12d 7436	. . . . . . . 8 ⊢ ((𝑎 = 𝑥 ∧ 𝑏 = 𝑥) → (((1st ‘𝑎) · (2nd ‘𝑏)) − ((1st ‘𝑏) · (2nd ‘𝑎))) = (((1st ‘𝑥) · (2nd ‘𝑥)) − ((1st ‘𝑥) · (2nd ‘𝑥))))
279	278	oveq2d 7434	. . . . . . 7 ⊢ ((𝑎 = 𝑥 ∧ 𝑏 = 𝑥) → (𝑡 · (((1st ‘𝑎) · (2nd ‘𝑏)) − ((1st ‘𝑏) · (2nd ‘𝑎)))) = (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑥)) − ((1st ‘𝑥) · (2nd ‘𝑥)))))
280	279	eqeq1d 2763	. . . . . 6 ⊢ ((𝑎 = 𝑥 ∧ 𝑏 = 𝑥) → ((𝑡 · (((1st ‘𝑎) · (2nd ‘𝑏)) − ((1st ‘𝑏) · (2nd ‘𝑎)))) = 0 ↔ (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑥)) − ((1st ‘𝑥) · (2nd ‘𝑥)))) = 0 ))
281	280	rexbidv 3187	. . . . 5 ⊢ ((𝑎 = 𝑥 ∧ 𝑏 = 𝑥) → (∃𝑡 ∈ 𝑆 (𝑡 · (((1st ‘𝑎) · (2nd ‘𝑏)) − ((1st ‘𝑏) · (2nd ‘𝑎)))) = 0 ↔ ∃𝑡 ∈ 𝑆 (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑥)) − ((1st ‘𝑥) · (2nd ‘𝑥)))) = 0 ))
282	281	adantl 487	. . . 4 ⊢ ((𝜑 ∧ (𝑎 = 𝑥 ∧ 𝑏 = 𝑥)) → (∃𝑡 ∈ 𝑆 (𝑡 · (((1st ‘𝑎) · (2nd ‘𝑏)) − ((1st ‘𝑏) · (2nd ‘𝑎)))) = 0 ↔ ∃𝑡 ∈ 𝑆 (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑥)) − ((1st ‘𝑥) · (2nd ‘𝑥)))) = 0 ))
283	16, 282	brab2d 5512	. . 3 ⊢ (𝜑 → (𝑥 ∼ 𝑥 ↔ ((𝑥 ∈ 𝑊 ∧ 𝑥 ∈ 𝑊) ∧ ∃𝑡 ∈ 𝑆 (𝑡 · (((1st ‘𝑥) · (2nd ‘𝑥)) − ((1st ‘𝑥) · (2nd ‘𝑥)))) = 0 )))
284	269, 283	bitr4d 285	. 2 ⊢ (𝜑 → (𝑥 ∈ 𝑊 ↔ 𝑥 ∼ 𝑥))
285	18, 96, 242, 284	iserd 8737	1 ⊢ (𝜑 → ∼ Er 𝑊)

This proof depends on syntax axioms:   → wi 4   ↔ wb 209   ∧ wa 401   = wceq 1570   ∈ wcel 2145  ∃wrex 3087   ⊆ wss 3899  ⟨cop 4590   class class class wbr 5103  {copab 5167   × cxp 5649  Rel wrel 5656  ‘cfv 6537  (class class class)co 7418  1^st c1st 7997  2^nd c2nd 7998   Er wer 8707  Basecbs 17380  +_gcplusg 17421  ._rcmulr 17422  0_gc0g 17603  SubMndcsubmnd 18970  Grpcgrp 19137  inv_gcminusg 19138  -_gcsg 19139  mulGrpcmgp 20353  1_rcur 20400  Ringcrg 20452  CRingccrg 20453   ~_RL cerl 33807

This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1943  ax-6 2000  ax-7 2041  ax-8 2147  ax-9 2155  ax-10 2178  ax-11 2194  ax-12 2213  ax-ext 2733  ax-sep 5249  ax-nul 5260  ax-pow 5327  ax-pr 5391  ax-un 7749  ax-cnex 11249  ax-resscn 11250  ax-1cn 11251  ax-icn 11252  ax-addcl 11253  ax-addrcl 11254  ax-mulcl 11255  ax-mulrcl 11256  ax-mulcom 11257  ax-addass 11258  ax-mulass 11259  ax-distr 11260  ax-i2m1 11261  ax-1ne0 11262  ax-1rid 11263  ax-rnegex 11264  ax-rrecex 11265  ax-cnre 11266  ax-pre-lttri 11267  ax-pre-lttrn 11268  ax-pre-ltadd 11269  ax-pre-mulgt0 11270

This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3or 1104  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-nf 1817  df-sb 2100  df-mo 2565  df-eu 2595  df-clab 2740  df-cleq 2753  df-clel 2836  df-nfc 2910  df-ne 2957  df-nel 3063  df-ral 3078  df-rex 3088  df-rmo 3366  df-reu 3367  df-rab 3414  df-v 3453  df-sbc 3740  df-csb 3848  df-dif 3902  df-un 3904  df-in 3906  df-ss 3916  df-pss 3919  df-nul 4280  df-if 4483  df-pw 4559  df-sn 4585  df-pr 4587  df-op 4591  df-uni 4868  df-iun 4953  df-br 5104  df-opab 5168  df-mpt 5187  df-tr 5213  df-id 5546  df-eprel 5551  df-po 5559  df-so 5560  df-fr 5604  df-we 5606  df-xp 5657  df-rel 5658  df-cnv 5659  df-co 5660  df-dm 5661  df-rn 5662  df-res 5663  df-ima 5664  df-pred 6303  df-ord 6364  df-on 6365  df-lim 6366  df-suc 6367  df-iota 6493  df-fun 6539  df-fn 6540  df-f 6541  df-f1 6542  df-fo 6543  df-f1o 6544  df-fv 6545  df-riota 7375  df-ov 7421  df-oprab 7422  df-mpo 7423  df-om 7876  df-1st 7999  df-2nd 8000  df-frecs 8292  df-wrecs 8323  df-recs 8372  df-rdg 8411  df-er 8710  df-en 8967  df-dom 8968  df-sdom 8969  df-pnf 11338  df-mnf 11339  df-xr 11340  df-ltxr 11341  df-le 11342  df-sub 11536  df-neg 11537  df-nn 12329  df-2 12398  df-sets 17335  df-slot 17353  df-ndx 17365  df-base 17381  df-ress 17402  df-plusg 17434  df-0g 17605  df-mgm 18809  df-sgrp 18901  df-mnd 18917  df-submnd 18972  df-grp 19140  df-minusg 19141  df-sbg 19142  df-cmn 19989  df-abl 19990  df-mgp 20354  df-rng 20368  df-ur 20401  df-ring 20454  df-cring 20455  df-erl 33809

This theorem is used by:  erld2  33820  rlocaddval  33823  rlocmulval  33824  rloccring  33825  rlocf1  33828  rlocinvunit  33829  rlocisunit  33830  fracfld  33863  zringfrac  34079