Theorem srgpcomp 18355

Description: If two elements of a semiring commute, they also commute if one of the elements is raised to a higher power. (Contributed by AV, 23-Aug-2019.)

Hypotheses

Ref	Expression
srgpcomp.s	⊢ 𝑆 = (Base‘𝑅)
srgpcomp.m	⊢ × = (.r‘𝑅)
srgpcomp.g	⊢ 𝐺 = (mulGrp‘𝑅)
srgpcomp.e	⊢ ↑ = (.g‘𝐺)
srgpcomp.r	⊢ (𝜑 → 𝑅 ∈ SRing)
srgpcomp.a	⊢ (𝜑 → 𝐴 ∈ 𝑆)
srgpcomp.b	⊢ (𝜑 → 𝐵 ∈ 𝑆)
srgpcomp.k	⊢ (𝜑 → 𝐾 ∈ ℕ0)
srgpcomp.c	⊢ (𝜑 → (𝐴 × 𝐵) = (𝐵 × 𝐴))

Assertion

Ref	Expression
srgpcomp	⊢ (𝜑 → ((𝐾 ↑ 𝐵) × 𝐴) = (𝐴 × (𝐾 ↑ 𝐵)))

Proof of Theorem srgpcomp

Dummy variables 𝑥 𝑦 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		srgpcomp.k	. 2 ⊢ (𝜑 → 𝐾 ∈ ℕ0)
2		oveq1 6556	. . . . . 6 ⊢ (𝑥 = 0 → (𝑥 ↑ 𝐵) = (0 ↑ 𝐵))
3	2	oveq1d 6564	. . . . 5 ⊢ (𝑥 = 0 → ((𝑥 ↑ 𝐵) × 𝐴) = ((0 ↑ 𝐵) × 𝐴))
4	2	oveq2d 6565	. . . . 5 ⊢ (𝑥 = 0 → (𝐴 × (𝑥 ↑ 𝐵)) = (𝐴 × (0 ↑ 𝐵)))
5	3, 4	eqeq12d 2625	. . . 4 ⊢ (𝑥 = 0 → (((𝑥 ↑ 𝐵) × 𝐴) = (𝐴 × (𝑥 ↑ 𝐵)) ↔ ((0 ↑ 𝐵) × 𝐴) = (𝐴 × (0 ↑ 𝐵))))
6	5	imbi2d 329	. . 3 ⊢ (𝑥 = 0 → ((𝜑 → ((𝑥 ↑ 𝐵) × 𝐴) = (𝐴 × (𝑥 ↑ 𝐵))) ↔ (𝜑 → ((0 ↑ 𝐵) × 𝐴) = (𝐴 × (0 ↑ 𝐵)))))
7		oveq1 6556	. . . . . 6 ⊢ (𝑥 = 𝑦 → (𝑥 ↑ 𝐵) = (𝑦 ↑ 𝐵))
8	7	oveq1d 6564	. . . . 5 ⊢ (𝑥 = 𝑦 → ((𝑥 ↑ 𝐵) × 𝐴) = ((𝑦 ↑ 𝐵) × 𝐴))
9	7	oveq2d 6565	. . . . 5 ⊢ (𝑥 = 𝑦 → (𝐴 × (𝑥 ↑ 𝐵)) = (𝐴 × (𝑦 ↑ 𝐵)))
10	8, 9	eqeq12d 2625	. . . 4 ⊢ (𝑥 = 𝑦 → (((𝑥 ↑ 𝐵) × 𝐴) = (𝐴 × (𝑥 ↑ 𝐵)) ↔ ((𝑦 ↑ 𝐵) × 𝐴) = (𝐴 × (𝑦 ↑ 𝐵))))
11	10	imbi2d 329	. . 3 ⊢ (𝑥 = 𝑦 → ((𝜑 → ((𝑥 ↑ 𝐵) × 𝐴) = (𝐴 × (𝑥 ↑ 𝐵))) ↔ (𝜑 → ((𝑦 ↑ 𝐵) × 𝐴) = (𝐴 × (𝑦 ↑ 𝐵)))))
12		oveq1 6556	. . . . . 6 ⊢ (𝑥 = (𝑦 + 1) → (𝑥 ↑ 𝐵) = ((𝑦 + 1) ↑ 𝐵))
13	12	oveq1d 6564	. . . . 5 ⊢ (𝑥 = (𝑦 + 1) → ((𝑥 ↑ 𝐵) × 𝐴) = (((𝑦 + 1) ↑ 𝐵) × 𝐴))
14	12	oveq2d 6565	. . . . 5 ⊢ (𝑥 = (𝑦 + 1) → (𝐴 × (𝑥 ↑ 𝐵)) = (𝐴 × ((𝑦 + 1) ↑ 𝐵)))
15	13, 14	eqeq12d 2625	. . . 4 ⊢ (𝑥 = (𝑦 + 1) → (((𝑥 ↑ 𝐵) × 𝐴) = (𝐴 × (𝑥 ↑ 𝐵)) ↔ (((𝑦 + 1) ↑ 𝐵) × 𝐴) = (𝐴 × ((𝑦 + 1) ↑ 𝐵))))
16	15	imbi2d 329	. . 3 ⊢ (𝑥 = (𝑦 + 1) → ((𝜑 → ((𝑥 ↑ 𝐵) × 𝐴) = (𝐴 × (𝑥 ↑ 𝐵))) ↔ (𝜑 → (((𝑦 + 1) ↑ 𝐵) × 𝐴) = (𝐴 × ((𝑦 + 1) ↑ 𝐵)))))
17		oveq1 6556	. . . . . 6 ⊢ (𝑥 = 𝐾 → (𝑥 ↑ 𝐵) = (𝐾 ↑ 𝐵))
18	17	oveq1d 6564	. . . . 5 ⊢ (𝑥 = 𝐾 → ((𝑥 ↑ 𝐵) × 𝐴) = ((𝐾 ↑ 𝐵) × 𝐴))
19	17	oveq2d 6565	. . . . 5 ⊢ (𝑥 = 𝐾 → (𝐴 × (𝑥 ↑ 𝐵)) = (𝐴 × (𝐾 ↑ 𝐵)))
20	18, 19	eqeq12d 2625	. . . 4 ⊢ (𝑥 = 𝐾 → (((𝑥 ↑ 𝐵) × 𝐴) = (𝐴 × (𝑥 ↑ 𝐵)) ↔ ((𝐾 ↑ 𝐵) × 𝐴) = (𝐴 × (𝐾 ↑ 𝐵))))
21	20	imbi2d 329	. . 3 ⊢ (𝑥 = 𝐾 → ((𝜑 → ((𝑥 ↑ 𝐵) × 𝐴) = (𝐴 × (𝑥 ↑ 𝐵))) ↔ (𝜑 → ((𝐾 ↑ 𝐵) × 𝐴) = (𝐴 × (𝐾 ↑ 𝐵)))))
22		srgpcomp.b	. . . . . 6 ⊢ (𝜑 → 𝐵 ∈ 𝑆)
23		srgpcomp.g	. . . . . . . 8 ⊢ 𝐺 = (mulGrp‘𝑅)
24		srgpcomp.s	. . . . . . . 8 ⊢ 𝑆 = (Base‘𝑅)
25	23, 24	mgpbas 18318	. . . . . . 7 ⊢ 𝑆 = (Base‘𝐺)
26		eqid 2610	. . . . . . . 8 ⊢ (1r‘𝑅) = (1r‘𝑅)
27	23, 26	ringidval 18326	. . . . . . 7 ⊢ (1r‘𝑅) = (0g‘𝐺)
28		srgpcomp.e	. . . . . . 7 ⊢ ↑ = (.g‘𝐺)
29	25, 27, 28	mulg0 17369	. . . . . 6 ⊢ (𝐵 ∈ 𝑆 → (0 ↑ 𝐵) = (1r‘𝑅))
30	22, 29	syl 17	. . . . 5 ⊢ (𝜑 → (0 ↑ 𝐵) = (1r‘𝑅))
31	30	oveq1d 6564	. . . 4 ⊢ (𝜑 → ((0 ↑ 𝐵) × 𝐴) = ((1r‘𝑅) × 𝐴))
32		srgpcomp.r	. . . . . 6 ⊢ (𝜑 → 𝑅 ∈ SRing)
33		srgpcomp.a	. . . . . 6 ⊢ (𝜑 → 𝐴 ∈ 𝑆)
34		srgpcomp.m	. . . . . . 7 ⊢ × = (.r‘𝑅)
35	24, 34, 26	srgridm 18345	. . . . . 6 ⊢ ((𝑅 ∈ SRing ∧ 𝐴 ∈ 𝑆) → (𝐴 × (1r‘𝑅)) = 𝐴)
36	32, 33, 35	syl2anc 691	. . . . 5 ⊢ (𝜑 → (𝐴 × (1r‘𝑅)) = 𝐴)
37	30	oveq2d 6565	. . . . 5 ⊢ (𝜑 → (𝐴 × (0 ↑ 𝐵)) = (𝐴 × (1r‘𝑅)))
38	24, 34, 26	srglidm 18344	. . . . . 6 ⊢ ((𝑅 ∈ SRing ∧ 𝐴 ∈ 𝑆) → ((1r‘𝑅) × 𝐴) = 𝐴)
39	32, 33, 38	syl2anc 691	. . . . 5 ⊢ (𝜑 → ((1r‘𝑅) × 𝐴) = 𝐴)
40	36, 37, 39	3eqtr4rd 2655	. . . 4 ⊢ (𝜑 → ((1r‘𝑅) × 𝐴) = (𝐴 × (0 ↑ 𝐵)))
41	31, 40	eqtrd 2644	. . 3 ⊢ (𝜑 → ((0 ↑ 𝐵) × 𝐴) = (𝐴 × (0 ↑ 𝐵)))
42	23	srgmgp 18333	. . . . . . . . . . . . 13 ⊢ (𝑅 ∈ SRing → 𝐺 ∈ Mnd)
43	32, 42	syl 17	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝐺 ∈ Mnd)
44	43	adantr 480	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑦 ∈ ℕ0) → 𝐺 ∈ Mnd)
45		simpr 476	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑦 ∈ ℕ0) → 𝑦 ∈ ℕ0)
46	22	adantr 480	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑦 ∈ ℕ0) → 𝐵 ∈ 𝑆)
47	23, 34	mgpplusg 18316	. . . . . . . . . . . 12 ⊢ × = (+g‘𝐺)
48	25, 28, 47	mulgnn0p1 17375	. . . . . . . . . . 11 ⊢ ((𝐺 ∈ Mnd ∧ 𝑦 ∈ ℕ0 ∧ 𝐵 ∈ 𝑆) → ((𝑦 + 1) ↑ 𝐵) = ((𝑦 ↑ 𝐵) × 𝐵))
49	44, 45, 46, 48	syl3anc 1318	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑦 ∈ ℕ0) → ((𝑦 + 1) ↑ 𝐵) = ((𝑦 ↑ 𝐵) × 𝐵))
50	49	oveq1d 6564	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑦 ∈ ℕ0) → (((𝑦 + 1) ↑ 𝐵) × 𝐴) = (((𝑦 ↑ 𝐵) × 𝐵) × 𝐴))
51		srgpcomp.c	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝐴 × 𝐵) = (𝐵 × 𝐴))
52	51	eqcomd 2616	. . . . . . . . . . . 12 ⊢ (𝜑 → (𝐵 × 𝐴) = (𝐴 × 𝐵))
53	52	adantr 480	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑦 ∈ ℕ0) → (𝐵 × 𝐴) = (𝐴 × 𝐵))
54	53	oveq2d 6565	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑦 ∈ ℕ0) → ((𝑦 ↑ 𝐵) × (𝐵 × 𝐴)) = ((𝑦 ↑ 𝐵) × (𝐴 × 𝐵)))
55	32	adantr 480	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑦 ∈ ℕ0) → 𝑅 ∈ SRing)
56	25, 28	mulgnn0cl 17381	. . . . . . . . . . . 12 ⊢ ((𝐺 ∈ Mnd ∧ 𝑦 ∈ ℕ0 ∧ 𝐵 ∈ 𝑆) → (𝑦 ↑ 𝐵) ∈ 𝑆)
57	44, 45, 46, 56	syl3anc 1318	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑦 ∈ ℕ0) → (𝑦 ↑ 𝐵) ∈ 𝑆)
58	33	adantr 480	. . . . . . . . . . 11 ⊢ ((𝜑 ∧ 𝑦 ∈ ℕ0) → 𝐴 ∈ 𝑆)
59	24, 34	srgass 18336	. . . . . . . . . . 11 ⊢ ((𝑅 ∈ SRing ∧ ((𝑦 ↑ 𝐵) ∈ 𝑆 ∧ 𝐵 ∈ 𝑆 ∧ 𝐴 ∈ 𝑆)) → (((𝑦 ↑ 𝐵) × 𝐵) × 𝐴) = ((𝑦 ↑ 𝐵) × (𝐵 × 𝐴)))
60	55, 57, 46, 58, 59	syl13anc 1320	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑦 ∈ ℕ0) → (((𝑦 ↑ 𝐵) × 𝐵) × 𝐴) = ((𝑦 ↑ 𝐵) × (𝐵 × 𝐴)))
61	24, 34	srgass 18336	. . . . . . . . . . 11 ⊢ ((𝑅 ∈ SRing ∧ ((𝑦 ↑ 𝐵) ∈ 𝑆 ∧ 𝐴 ∈ 𝑆 ∧ 𝐵 ∈ 𝑆)) → (((𝑦 ↑ 𝐵) × 𝐴) × 𝐵) = ((𝑦 ↑ 𝐵) × (𝐴 × 𝐵)))
62	55, 57, 58, 46, 61	syl13anc 1320	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑦 ∈ ℕ0) → (((𝑦 ↑ 𝐵) × 𝐴) × 𝐵) = ((𝑦 ↑ 𝐵) × (𝐴 × 𝐵)))
63	54, 60, 62	3eqtr4d 2654	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑦 ∈ ℕ0) → (((𝑦 ↑ 𝐵) × 𝐵) × 𝐴) = (((𝑦 ↑ 𝐵) × 𝐴) × 𝐵))
64	50, 63	eqtrd 2644	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑦 ∈ ℕ0) → (((𝑦 + 1) ↑ 𝐵) × 𝐴) = (((𝑦 ↑ 𝐵) × 𝐴) × 𝐵))
65	64	adantr 480	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑦 ∈ ℕ0) ∧ ((𝑦 ↑ 𝐵) × 𝐴) = (𝐴 × (𝑦 ↑ 𝐵))) → (((𝑦 + 1) ↑ 𝐵) × 𝐴) = (((𝑦 ↑ 𝐵) × 𝐴) × 𝐵))
66		oveq1 6556	. . . . . . . 8 ⊢ (((𝑦 ↑ 𝐵) × 𝐴) = (𝐴 × (𝑦 ↑ 𝐵)) → (((𝑦 ↑ 𝐵) × 𝐴) × 𝐵) = ((𝐴 × (𝑦 ↑ 𝐵)) × 𝐵))
67	24, 34	srgass 18336	. . . . . . . . . 10 ⊢ ((𝑅 ∈ SRing ∧ (𝐴 ∈ 𝑆 ∧ (𝑦 ↑ 𝐵) ∈ 𝑆 ∧ 𝐵 ∈ 𝑆)) → ((𝐴 × (𝑦 ↑ 𝐵)) × 𝐵) = (𝐴 × ((𝑦 ↑ 𝐵) × 𝐵)))
68	55, 58, 57, 46, 67	syl13anc 1320	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑦 ∈ ℕ0) → ((𝐴 × (𝑦 ↑ 𝐵)) × 𝐵) = (𝐴 × ((𝑦 ↑ 𝐵) × 𝐵)))
69	49	eqcomd 2616	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑦 ∈ ℕ0) → ((𝑦 ↑ 𝐵) × 𝐵) = ((𝑦 + 1) ↑ 𝐵))
70	69	oveq2d 6565	. . . . . . . . 9 ⊢ ((𝜑 ∧ 𝑦 ∈ ℕ0) → (𝐴 × ((𝑦 ↑ 𝐵) × 𝐵)) = (𝐴 × ((𝑦 + 1) ↑ 𝐵)))
71	68, 70	eqtrd 2644	. . . . . . . 8 ⊢ ((𝜑 ∧ 𝑦 ∈ ℕ0) → ((𝐴 × (𝑦 ↑ 𝐵)) × 𝐵) = (𝐴 × ((𝑦 + 1) ↑ 𝐵)))
72	66, 71	sylan9eqr 2666	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑦 ∈ ℕ0) ∧ ((𝑦 ↑ 𝐵) × 𝐴) = (𝐴 × (𝑦 ↑ 𝐵))) → (((𝑦 ↑ 𝐵) × 𝐴) × 𝐵) = (𝐴 × ((𝑦 + 1) ↑ 𝐵)))
73	65, 72	eqtrd 2644	. . . . . 6 ⊢ (((𝜑 ∧ 𝑦 ∈ ℕ0) ∧ ((𝑦 ↑ 𝐵) × 𝐴) = (𝐴 × (𝑦 ↑ 𝐵))) → (((𝑦 + 1) ↑ 𝐵) × 𝐴) = (𝐴 × ((𝑦 + 1) ↑ 𝐵)))
74	73	ex 449	. . . . 5 ⊢ ((𝜑 ∧ 𝑦 ∈ ℕ0) → (((𝑦 ↑ 𝐵) × 𝐴) = (𝐴 × (𝑦 ↑ 𝐵)) → (((𝑦 + 1) ↑ 𝐵) × 𝐴) = (𝐴 × ((𝑦 + 1) ↑ 𝐵))))
75	74	expcom 450	. . . 4 ⊢ (𝑦 ∈ ℕ0 → (𝜑 → (((𝑦 ↑ 𝐵) × 𝐴) = (𝐴 × (𝑦 ↑ 𝐵)) → (((𝑦 + 1) ↑ 𝐵) × 𝐴) = (𝐴 × ((𝑦 + 1) ↑ 𝐵)))))
76	75	a2d 29	. . 3 ⊢ (𝑦 ∈ ℕ0 → ((𝜑 → ((𝑦 ↑ 𝐵) × 𝐴) = (𝐴 × (𝑦 ↑ 𝐵))) → (𝜑 → (((𝑦 + 1) ↑ 𝐵) × 𝐴) = (𝐴 × ((𝑦 + 1) ↑ 𝐵)))))
77	6, 11, 16, 21, 41, 76	nn0ind 11348	. 2 ⊢ (𝐾 ∈ ℕ0 → (𝜑 → ((𝐾 ↑ 𝐵) × 𝐴) = (𝐴 × (𝐾 ↑ 𝐵))))
78	1, 77	mpcom 37	1 ⊢ (𝜑 → ((𝐾 ↑ 𝐵) × 𝐴) = (𝐴 × (𝐾 ↑ 𝐵)))

Syntax hints:   → wi 4   ∧ wa 383   = wceq 1475   ∈ wcel 1977  ‘cfv 5804  (class class class)co 6549  0cc0 9815  1c1 9816   + caddc 9818  ℕ₀cn0 11169  Basecbs 15695  ._rcmulr 15769  Mndcmnd 17117  ._gcmg 17363  mulGrpcmgp 18312  1_rcur 18324  SRingcsrg 18328

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1713  ax-4 1728  ax-5 1827  ax-6 1875  ax-7 1922  ax-8 1979  ax-9 1986  ax-10 2006  ax-11 2021  ax-12 2034  ax-13 2234  ax-ext 2590  ax-rep 4699  ax-sep 4709  ax-nul 4717  ax-pow 4769  ax-pr 4833  ax-un 6847  ax-inf2 8421  ax-cnex 9871  ax-resscn 9872  ax-1cn 9873  ax-icn 9874  ax-addcl 9875  ax-addrcl 9876  ax-mulcl 9877  ax-mulrcl 9878  ax-mulcom 9879  ax-addass 9880  ax-mulass 9881  ax-distr 9882  ax-i2m1 9883  ax-1ne0 9884  ax-1rid 9885  ax-rnegex 9886  ax-rrecex 9887  ax-cnre 9888  ax-pre-lttri 9889  ax-pre-lttrn 9890  ax-pre-ltadd 9891  ax-pre-mulgt0 9892

This theorem depends on definitions:  df-bi 196  df-or 384  df-an 385  df-3or 1032  df-3an 1033  df-tru 1478  df-ex 1696  df-nf 1701  df-sb 1868  df-eu 2462  df-mo 2463  df-clab 2597  df-cleq 2603  df-clel 2606  df-nfc 2740  df-ne 2782  df-nel 2783  df-ral 2901  df-rex 2902  df-reu 2903  df-rmo 2904  df-rab 2905  df-v 3175  df-sbc 3403  df-csb 3500  df-dif 3543  df-un 3545  df-in 3547  df-ss 3554  df-pss 3556  df-nul 3875  df-if 4037  df-pw 4110  df-sn 4126  df-pr 4128  df-tp 4130  df-op 4132  df-uni 4373  df-iun 4457  df-br 4584  df-opab 4644  df-mpt 4645  df-tr 4681  df-eprel 4949  df-id 4953  df-po 4959  df-so 4960  df-fr 4997  df-we 4999  df-xp 5044  df-rel 5045  df-cnv 5046  df-co 5047  df-dm 5048  df-rn 5049  df-res 5050  df-ima 5051  df-pred 5597  df-ord 5643  df-on 5644  df-lim 5645  df-suc 5646  df-iota 5768  df-fun 5806  df-fn 5807  df-f 5808  df-f1 5809  df-fo 5810  df-f1o 5811  df-fv 5812  df-riota 6511  df-ov 6552  df-oprab 6553  df-mpt2 6554  df-om 6958  df-1st 7059  df-2nd 7060  df-wrecs 7294  df-recs 7355  df-rdg 7393  df-er 7629  df-en 7842  df-dom 7843  df-sdom 7844  df-pnf 9955  df-mnf 9956  df-xr 9957  df-ltxr 9958  df-le 9959  df-sub 10147  df-neg 10148  df-nn 10898  df-2 10956  df-n0 11170  df-z 11255  df-uz 11564  df-fz 12198  df-seq 12664  df-ndx 15698  df-slot 15699  df-base 15700  df-sets 15701  df-plusg 15781  df-0g 15925  df-mgm 17065  df-sgrp 17107  df-mnd 17118  df-mulg 17364  df-mgp 18313  df-ur 18325  df-srg 18329

This theorem is referenced by:  srgpcompp  18356  mplcoe5lem  19288