Theorem 1mavmul 20173

Description: Multiplication of the identity NxN matrix with an N-dimensional vector results in the vector itself. (Contributed by AV, 9-Feb-2019.) (Revised by AV, 23-Feb-2019.)

Hypotheses

Ref	Expression
1mavmul.a	⊢ 𝐴 = (𝑁 Mat 𝑅)
1mavmul.b	⊢ 𝐵 = (Base‘𝑅)
1mavmul.t	⊢ · = (𝑅 maVecMul ⟨𝑁, 𝑁⟩)
1mavmul.r	⊢ (𝜑 → 𝑅 ∈ Ring)
1mavmul.n	⊢ (𝜑 → 𝑁 ∈ Fin)
1mavmul.y	⊢ (𝜑 → 𝑌 ∈ (𝐵 ↑𝑚 𝑁))

Assertion

Ref	Expression
1mavmul	⊢ (𝜑 → ((1r‘𝐴) · 𝑌) = 𝑌)

Proof of Theorem 1mavmul

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

Step	Hyp	Ref	Expression
1		1mavmul.a	. . 3 ⊢ 𝐴 = (𝑁 Mat 𝑅)
2		1mavmul.t	. . 3 ⊢ · = (𝑅 maVecMul ⟨𝑁, 𝑁⟩)
3		1mavmul.b	. . 3 ⊢ 𝐵 = (Base‘𝑅)
4		eqid 2610	. . 3 ⊢ (.r‘𝑅) = (.r‘𝑅)
5		1mavmul.r	. . 3 ⊢ (𝜑 → 𝑅 ∈ Ring)
6		1mavmul.n	. . 3 ⊢ (𝜑 → 𝑁 ∈ Fin)
7		eqid 2610	. . . . 5 ⊢ (Base‘𝐴) = (Base‘𝐴)
8	1	fveq2i 6106	. . . . 5 ⊢ (1r‘𝐴) = (1r‘(𝑁 Mat 𝑅))
9	1, 7, 8	mat1bas 20074	. . . 4 ⊢ ((𝑅 ∈ Ring ∧ 𝑁 ∈ Fin) → (1r‘𝐴) ∈ (Base‘𝐴))
10	5, 6, 9	syl2anc 691	. . 3 ⊢ (𝜑 → (1r‘𝐴) ∈ (Base‘𝐴))
11		1mavmul.y	. . 3 ⊢ (𝜑 → 𝑌 ∈ (𝐵 ↑𝑚 𝑁))
12	1, 2, 3, 4, 5, 6, 10, 11	mavmulval 20170	. 2 ⊢ (𝜑 → ((1r‘𝐴) · 𝑌) = (𝑖 ∈ 𝑁 ↦ (𝑅 Σg (𝑗 ∈ 𝑁 ↦ ((𝑖(1r‘𝐴)𝑗)(.r‘𝑅)(𝑌‘𝑗))))))
13		eqid 2610	. . . . . . . . . 10 ⊢ (1r‘𝑅) = (1r‘𝑅)
14		eqid 2610	. . . . . . . . . 10 ⊢ (0g‘𝑅) = (0g‘𝑅)
15	1, 13, 14	mat1 20072	. . . . . . . . 9 ⊢ ((𝑁 ∈ Fin ∧ 𝑅 ∈ Ring) → (1r‘𝐴) = (𝑥 ∈ 𝑁, 𝑦 ∈ 𝑁 ↦ if(𝑥 = 𝑦, (1r‘𝑅), (0g‘𝑅))))
16	6, 5, 15	syl2anc 691	. . . . . . . 8 ⊢ (𝜑 → (1r‘𝐴) = (𝑥 ∈ 𝑁, 𝑦 ∈ 𝑁 ↦ if(𝑥 = 𝑦, (1r‘𝑅), (0g‘𝑅))))
17	16	oveqdr 6573	. . . . . . 7 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝑁) → (𝑖(1r‘𝐴)𝑗) = (𝑖(𝑥 ∈ 𝑁, 𝑦 ∈ 𝑁 ↦ if(𝑥 = 𝑦, (1r‘𝑅), (0g‘𝑅)))𝑗))
18	17	oveq1d 6564	. . . . . 6 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝑁) → ((𝑖(1r‘𝐴)𝑗)(.r‘𝑅)(𝑌‘𝑗)) = ((𝑖(𝑥 ∈ 𝑁, 𝑦 ∈ 𝑁 ↦ if(𝑥 = 𝑦, (1r‘𝑅), (0g‘𝑅)))𝑗)(.r‘𝑅)(𝑌‘𝑗)))
19	18	mpteq2dv 4673	. . . . 5 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝑁) → (𝑗 ∈ 𝑁 ↦ ((𝑖(1r‘𝐴)𝑗)(.r‘𝑅)(𝑌‘𝑗))) = (𝑗 ∈ 𝑁 ↦ ((𝑖(𝑥 ∈ 𝑁, 𝑦 ∈ 𝑁 ↦ if(𝑥 = 𝑦, (1r‘𝑅), (0g‘𝑅)))𝑗)(.r‘𝑅)(𝑌‘𝑗))))
20	19	oveq2d 6565	. . . 4 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝑁) → (𝑅 Σg (𝑗 ∈ 𝑁 ↦ ((𝑖(1r‘𝐴)𝑗)(.r‘𝑅)(𝑌‘𝑗)))) = (𝑅 Σg (𝑗 ∈ 𝑁 ↦ ((𝑖(𝑥 ∈ 𝑁, 𝑦 ∈ 𝑁 ↦ if(𝑥 = 𝑦, (1r‘𝑅), (0g‘𝑅)))𝑗)(.r‘𝑅)(𝑌‘𝑗)))))
21		eqidd 2611	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑖 ∈ 𝑁) ∧ 𝑗 ∈ 𝑁) → (𝑥 ∈ 𝑁, 𝑦 ∈ 𝑁 ↦ if(𝑥 = 𝑦, (1r‘𝑅), (0g‘𝑅))) = (𝑥 ∈ 𝑁, 𝑦 ∈ 𝑁 ↦ if(𝑥 = 𝑦, (1r‘𝑅), (0g‘𝑅))))
22		eqeq12 2623	. . . . . . . . . . 11 ⊢ ((𝑥 = 𝑖 ∧ 𝑦 = 𝑗) → (𝑥 = 𝑦 ↔ 𝑖 = 𝑗))
23	22	ifbid 4058	. . . . . . . . . 10 ⊢ ((𝑥 = 𝑖 ∧ 𝑦 = 𝑗) → if(𝑥 = 𝑦, (1r‘𝑅), (0g‘𝑅)) = if(𝑖 = 𝑗, (1r‘𝑅), (0g‘𝑅)))
24	23	adantl 481	. . . . . . . . 9 ⊢ ((((𝜑 ∧ 𝑖 ∈ 𝑁) ∧ 𝑗 ∈ 𝑁) ∧ (𝑥 = 𝑖 ∧ 𝑦 = 𝑗)) → if(𝑥 = 𝑦, (1r‘𝑅), (0g‘𝑅)) = if(𝑖 = 𝑗, (1r‘𝑅), (0g‘𝑅)))
25		simpr 476	. . . . . . . . . 10 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝑁) → 𝑖 ∈ 𝑁)
26	25	adantr 480	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑖 ∈ 𝑁) ∧ 𝑗 ∈ 𝑁) → 𝑖 ∈ 𝑁)
27		simpr 476	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑖 ∈ 𝑁) ∧ 𝑗 ∈ 𝑁) → 𝑗 ∈ 𝑁)
28		fvex 6113	. . . . . . . . . . 11 ⊢ (1r‘𝑅) ∈ V
29	28	a1i 11	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑖 ∈ 𝑁) ∧ 𝑗 ∈ 𝑁) → (1r‘𝑅) ∈ V)
30		fvex 6113	. . . . . . . . . . 11 ⊢ (0g‘𝑅) ∈ V
31	30	a1i 11	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑖 ∈ 𝑁) ∧ 𝑗 ∈ 𝑁) → (0g‘𝑅) ∈ V)
32	29, 31	ifcld 4081	. . . . . . . . 9 ⊢ (((𝜑 ∧ 𝑖 ∈ 𝑁) ∧ 𝑗 ∈ 𝑁) → if(𝑖 = 𝑗, (1r‘𝑅), (0g‘𝑅)) ∈ V)
33	21, 24, 26, 27, 32	ovmpt2d 6686	. . . . . . . 8 ⊢ (((𝜑 ∧ 𝑖 ∈ 𝑁) ∧ 𝑗 ∈ 𝑁) → (𝑖(𝑥 ∈ 𝑁, 𝑦 ∈ 𝑁 ↦ if(𝑥 = 𝑦, (1r‘𝑅), (0g‘𝑅)))𝑗) = if(𝑖 = 𝑗, (1r‘𝑅), (0g‘𝑅)))
34	33	oveq1d 6564	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑖 ∈ 𝑁) ∧ 𝑗 ∈ 𝑁) → ((𝑖(𝑥 ∈ 𝑁, 𝑦 ∈ 𝑁 ↦ if(𝑥 = 𝑦, (1r‘𝑅), (0g‘𝑅)))𝑗)(.r‘𝑅)(𝑌‘𝑗)) = (if(𝑖 = 𝑗, (1r‘𝑅), (0g‘𝑅))(.r‘𝑅)(𝑌‘𝑗)))
35		iftrue 4042	. . . . . . . . . . . 12 ⊢ (𝑖 = 𝑗 → if(𝑖 = 𝑗, (1r‘𝑅), (0g‘𝑅)) = (1r‘𝑅))
36	35	adantr 480	. . . . . . . . . . 11 ⊢ ((𝑖 = 𝑗 ∧ ((𝜑 ∧ 𝑖 ∈ 𝑁) ∧ 𝑗 ∈ 𝑁)) → if(𝑖 = 𝑗, (1r‘𝑅), (0g‘𝑅)) = (1r‘𝑅))
37	36	oveq1d 6564	. . . . . . . . . 10 ⊢ ((𝑖 = 𝑗 ∧ ((𝜑 ∧ 𝑖 ∈ 𝑁) ∧ 𝑗 ∈ 𝑁)) → (if(𝑖 = 𝑗, (1r‘𝑅), (0g‘𝑅))(.r‘𝑅)(𝑌‘𝑗)) = ((1r‘𝑅)(.r‘𝑅)(𝑌‘𝑗)))
38	5	adantr 480	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝑁) → 𝑅 ∈ Ring)
39	38	adantr 480	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑖 ∈ 𝑁) ∧ 𝑗 ∈ 𝑁) → 𝑅 ∈ Ring)
40		fvex 6113	. . . . . . . . . . . . . . . . . . 19 ⊢ (Base‘𝑅) ∈ V
41	3, 40	eqeltri 2684	. . . . . . . . . . . . . . . . . 18 ⊢ 𝐵 ∈ V
42	41	a1i 11	. . . . . . . . . . . . . . . . 17 ⊢ (𝜑 → 𝐵 ∈ V)
43	42, 6	elmapd 7758	. . . . . . . . . . . . . . . 16 ⊢ (𝜑 → (𝑌 ∈ (𝐵 ↑𝑚 𝑁) ↔ 𝑌:𝑁⟶𝐵))
44		ffvelrn 6265	. . . . . . . . . . . . . . . . 17 ⊢ ((𝑌:𝑁⟶𝐵 ∧ 𝑗 ∈ 𝑁) → (𝑌‘𝑗) ∈ 𝐵)
45	44	ex 449	. . . . . . . . . . . . . . . 16 ⊢ (𝑌:𝑁⟶𝐵 → (𝑗 ∈ 𝑁 → (𝑌‘𝑗) ∈ 𝐵))
46	43, 45	syl6bi 242	. . . . . . . . . . . . . . 15 ⊢ (𝜑 → (𝑌 ∈ (𝐵 ↑𝑚 𝑁) → (𝑗 ∈ 𝑁 → (𝑌‘𝑗) ∈ 𝐵)))
47	11, 46	mpd 15	. . . . . . . . . . . . . 14 ⊢ (𝜑 → (𝑗 ∈ 𝑁 → (𝑌‘𝑗) ∈ 𝐵))
48	47	adantr 480	. . . . . . . . . . . . 13 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝑁) → (𝑗 ∈ 𝑁 → (𝑌‘𝑗) ∈ 𝐵))
49	48	imp 444	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ 𝑖 ∈ 𝑁) ∧ 𝑗 ∈ 𝑁) → (𝑌‘𝑗) ∈ 𝐵)
50	3, 4, 13	ringlidm 18394	. . . . . . . . . . . 12 ⊢ ((𝑅 ∈ Ring ∧ (𝑌‘𝑗) ∈ 𝐵) → ((1r‘𝑅)(.r‘𝑅)(𝑌‘𝑗)) = (𝑌‘𝑗))
51	39, 49, 50	syl2anc 691	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ 𝑖 ∈ 𝑁) ∧ 𝑗 ∈ 𝑁) → ((1r‘𝑅)(.r‘𝑅)(𝑌‘𝑗)) = (𝑌‘𝑗))
52	51	adantl 481	. . . . . . . . . 10 ⊢ ((𝑖 = 𝑗 ∧ ((𝜑 ∧ 𝑖 ∈ 𝑁) ∧ 𝑗 ∈ 𝑁)) → ((1r‘𝑅)(.r‘𝑅)(𝑌‘𝑗)) = (𝑌‘𝑗))
53		fveq2 6103	. . . . . . . . . . . 12 ⊢ (𝑗 = 𝑖 → (𝑌‘𝑗) = (𝑌‘𝑖))
54	53	equcoms 1934	. . . . . . . . . . 11 ⊢ (𝑖 = 𝑗 → (𝑌‘𝑗) = (𝑌‘𝑖))
55	54	adantr 480	. . . . . . . . . 10 ⊢ ((𝑖 = 𝑗 ∧ ((𝜑 ∧ 𝑖 ∈ 𝑁) ∧ 𝑗 ∈ 𝑁)) → (𝑌‘𝑗) = (𝑌‘𝑖))
56	37, 52, 55	3eqtrd 2648	. . . . . . . . 9 ⊢ ((𝑖 = 𝑗 ∧ ((𝜑 ∧ 𝑖 ∈ 𝑁) ∧ 𝑗 ∈ 𝑁)) → (if(𝑖 = 𝑗, (1r‘𝑅), (0g‘𝑅))(.r‘𝑅)(𝑌‘𝑗)) = (𝑌‘𝑖))
57		iftrue 4042	. . . . . . . . . . 11 ⊢ (𝑗 = 𝑖 → if(𝑗 = 𝑖, (𝑌‘𝑖), (0g‘𝑅)) = (𝑌‘𝑖))
58	57	equcoms 1934	. . . . . . . . . 10 ⊢ (𝑖 = 𝑗 → if(𝑗 = 𝑖, (𝑌‘𝑖), (0g‘𝑅)) = (𝑌‘𝑖))
59	58	adantr 480	. . . . . . . . 9 ⊢ ((𝑖 = 𝑗 ∧ ((𝜑 ∧ 𝑖 ∈ 𝑁) ∧ 𝑗 ∈ 𝑁)) → if(𝑗 = 𝑖, (𝑌‘𝑖), (0g‘𝑅)) = (𝑌‘𝑖))
60	56, 59	eqtr4d 2647	. . . . . . . 8 ⊢ ((𝑖 = 𝑗 ∧ ((𝜑 ∧ 𝑖 ∈ 𝑁) ∧ 𝑗 ∈ 𝑁)) → (if(𝑖 = 𝑗, (1r‘𝑅), (0g‘𝑅))(.r‘𝑅)(𝑌‘𝑗)) = if(𝑗 = 𝑖, (𝑌‘𝑖), (0g‘𝑅)))
61		iffalse 4045	. . . . . . . . . . 11 ⊢ (¬ 𝑖 = 𝑗 → if(𝑖 = 𝑗, (1r‘𝑅), (0g‘𝑅)) = (0g‘𝑅))
62	61	oveq1d 6564	. . . . . . . . . 10 ⊢ (¬ 𝑖 = 𝑗 → (if(𝑖 = 𝑗, (1r‘𝑅), (0g‘𝑅))(.r‘𝑅)(𝑌‘𝑗)) = ((0g‘𝑅)(.r‘𝑅)(𝑌‘𝑗)))
63	62	adantr 480	. . . . . . . . 9 ⊢ ((¬ 𝑖 = 𝑗 ∧ ((𝜑 ∧ 𝑖 ∈ 𝑁) ∧ 𝑗 ∈ 𝑁)) → (if(𝑖 = 𝑗, (1r‘𝑅), (0g‘𝑅))(.r‘𝑅)(𝑌‘𝑗)) = ((0g‘𝑅)(.r‘𝑅)(𝑌‘𝑗)))
64	3, 4, 14	ringlz 18410	. . . . . . . . . . 11 ⊢ ((𝑅 ∈ Ring ∧ (𝑌‘𝑗) ∈ 𝐵) → ((0g‘𝑅)(.r‘𝑅)(𝑌‘𝑗)) = (0g‘𝑅))
65	39, 49, 64	syl2anc 691	. . . . . . . . . 10 ⊢ (((𝜑 ∧ 𝑖 ∈ 𝑁) ∧ 𝑗 ∈ 𝑁) → ((0g‘𝑅)(.r‘𝑅)(𝑌‘𝑗)) = (0g‘𝑅))
66	65	adantl 481	. . . . . . . . 9 ⊢ ((¬ 𝑖 = 𝑗 ∧ ((𝜑 ∧ 𝑖 ∈ 𝑁) ∧ 𝑗 ∈ 𝑁)) → ((0g‘𝑅)(.r‘𝑅)(𝑌‘𝑗)) = (0g‘𝑅))
67		eqcom 2617	. . . . . . . . . . . 12 ⊢ (𝑖 = 𝑗 ↔ 𝑗 = 𝑖)
68		iffalse 4045	. . . . . . . . . . . 12 ⊢ (¬ 𝑗 = 𝑖 → if(𝑗 = 𝑖, (𝑌‘𝑖), (0g‘𝑅)) = (0g‘𝑅))
69	67, 68	sylnbi 319	. . . . . . . . . . 11 ⊢ (¬ 𝑖 = 𝑗 → if(𝑗 = 𝑖, (𝑌‘𝑖), (0g‘𝑅)) = (0g‘𝑅))
70	69	eqcomd 2616	. . . . . . . . . 10 ⊢ (¬ 𝑖 = 𝑗 → (0g‘𝑅) = if(𝑗 = 𝑖, (𝑌‘𝑖), (0g‘𝑅)))
71	70	adantr 480	. . . . . . . . 9 ⊢ ((¬ 𝑖 = 𝑗 ∧ ((𝜑 ∧ 𝑖 ∈ 𝑁) ∧ 𝑗 ∈ 𝑁)) → (0g‘𝑅) = if(𝑗 = 𝑖, (𝑌‘𝑖), (0g‘𝑅)))
72	63, 66, 71	3eqtrd 2648	. . . . . . . 8 ⊢ ((¬ 𝑖 = 𝑗 ∧ ((𝜑 ∧ 𝑖 ∈ 𝑁) ∧ 𝑗 ∈ 𝑁)) → (if(𝑖 = 𝑗, (1r‘𝑅), (0g‘𝑅))(.r‘𝑅)(𝑌‘𝑗)) = if(𝑗 = 𝑖, (𝑌‘𝑖), (0g‘𝑅)))
73	60, 72	pm2.61ian 827	. . . . . . 7 ⊢ (((𝜑 ∧ 𝑖 ∈ 𝑁) ∧ 𝑗 ∈ 𝑁) → (if(𝑖 = 𝑗, (1r‘𝑅), (0g‘𝑅))(.r‘𝑅)(𝑌‘𝑗)) = if(𝑗 = 𝑖, (𝑌‘𝑖), (0g‘𝑅)))
74	34, 73	eqtrd 2644	. . . . . 6 ⊢ (((𝜑 ∧ 𝑖 ∈ 𝑁) ∧ 𝑗 ∈ 𝑁) → ((𝑖(𝑥 ∈ 𝑁, 𝑦 ∈ 𝑁 ↦ if(𝑥 = 𝑦, (1r‘𝑅), (0g‘𝑅)))𝑗)(.r‘𝑅)(𝑌‘𝑗)) = if(𝑗 = 𝑖, (𝑌‘𝑖), (0g‘𝑅)))
75	74	mpteq2dva 4672	. . . . 5 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝑁) → (𝑗 ∈ 𝑁 ↦ ((𝑖(𝑥 ∈ 𝑁, 𝑦 ∈ 𝑁 ↦ if(𝑥 = 𝑦, (1r‘𝑅), (0g‘𝑅)))𝑗)(.r‘𝑅)(𝑌‘𝑗))) = (𝑗 ∈ 𝑁 ↦ if(𝑗 = 𝑖, (𝑌‘𝑖), (0g‘𝑅))))
76	75	oveq2d 6565	. . . 4 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝑁) → (𝑅 Σg (𝑗 ∈ 𝑁 ↦ ((𝑖(𝑥 ∈ 𝑁, 𝑦 ∈ 𝑁 ↦ if(𝑥 = 𝑦, (1r‘𝑅), (0g‘𝑅)))𝑗)(.r‘𝑅)(𝑌‘𝑗)))) = (𝑅 Σg (𝑗 ∈ 𝑁 ↦ if(𝑗 = 𝑖, (𝑌‘𝑖), (0g‘𝑅)))))
77		ringmnd 18379	. . . . . . 7 ⊢ (𝑅 ∈ Ring → 𝑅 ∈ Mnd)
78	5, 77	syl 17	. . . . . 6 ⊢ (𝜑 → 𝑅 ∈ Mnd)
79	78	adantr 480	. . . . 5 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝑁) → 𝑅 ∈ Mnd)
80	6	adantr 480	. . . . 5 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝑁) → 𝑁 ∈ Fin)
81		eqid 2610	. . . . 5 ⊢ (𝑗 ∈ 𝑁 ↦ if(𝑗 = 𝑖, (𝑌‘𝑖), (0g‘𝑅))) = (𝑗 ∈ 𝑁 ↦ if(𝑗 = 𝑖, (𝑌‘𝑖), (0g‘𝑅)))
82		ffvelrn 6265	. . . . . . . . . 10 ⊢ ((𝑌:𝑁⟶𝐵 ∧ 𝑖 ∈ 𝑁) → (𝑌‘𝑖) ∈ 𝐵)
83	82, 3	syl6eleq 2698	. . . . . . . . 9 ⊢ ((𝑌:𝑁⟶𝐵 ∧ 𝑖 ∈ 𝑁) → (𝑌‘𝑖) ∈ (Base‘𝑅))
84	83	ex 449	. . . . . . . 8 ⊢ (𝑌:𝑁⟶𝐵 → (𝑖 ∈ 𝑁 → (𝑌‘𝑖) ∈ (Base‘𝑅)))
85	43, 84	syl6bi 242	. . . . . . 7 ⊢ (𝜑 → (𝑌 ∈ (𝐵 ↑𝑚 𝑁) → (𝑖 ∈ 𝑁 → (𝑌‘𝑖) ∈ (Base‘𝑅))))
86	11, 85	mpd 15	. . . . . 6 ⊢ (𝜑 → (𝑖 ∈ 𝑁 → (𝑌‘𝑖) ∈ (Base‘𝑅)))
87	86	imp 444	. . . . 5 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝑁) → (𝑌‘𝑖) ∈ (Base‘𝑅))
88	14, 79, 80, 25, 81, 87	gsummptif1n0 18188	. . . 4 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝑁) → (𝑅 Σg (𝑗 ∈ 𝑁 ↦ if(𝑗 = 𝑖, (𝑌‘𝑖), (0g‘𝑅)))) = (𝑌‘𝑖))
89	20, 76, 88	3eqtrd 2648	. . 3 ⊢ ((𝜑 ∧ 𝑖 ∈ 𝑁) → (𝑅 Σg (𝑗 ∈ 𝑁 ↦ ((𝑖(1r‘𝐴)𝑗)(.r‘𝑅)(𝑌‘𝑗)))) = (𝑌‘𝑖))
90	89	mpteq2dva 4672	. 2 ⊢ (𝜑 → (𝑖 ∈ 𝑁 ↦ (𝑅 Σg (𝑗 ∈ 𝑁 ↦ ((𝑖(1r‘𝐴)𝑗)(.r‘𝑅)(𝑌‘𝑗))))) = (𝑖 ∈ 𝑁 ↦ (𝑌‘𝑖)))
91		ffn 5958	. . . . 5 ⊢ (𝑌:𝑁⟶𝐵 → 𝑌 Fn 𝑁)
92	43, 91	syl6bi 242	. . . 4 ⊢ (𝜑 → (𝑌 ∈ (𝐵 ↑𝑚 𝑁) → 𝑌 Fn 𝑁))
93	11, 92	mpd 15	. . 3 ⊢ (𝜑 → 𝑌 Fn 𝑁)
94		eqcom 2617	. . . 4 ⊢ ((𝑖 ∈ 𝑁 ↦ (𝑌‘𝑖)) = 𝑌 ↔ 𝑌 = (𝑖 ∈ 𝑁 ↦ (𝑌‘𝑖)))
95		dffn5 6151	. . . 4 ⊢ (𝑌 Fn 𝑁 ↔ 𝑌 = (𝑖 ∈ 𝑁 ↦ (𝑌‘𝑖)))
96	94, 95	bitr4i 266	. . 3 ⊢ ((𝑖 ∈ 𝑁 ↦ (𝑌‘𝑖)) = 𝑌 ↔ 𝑌 Fn 𝑁)
97	93, 96	sylibr 223	. 2 ⊢ (𝜑 → (𝑖 ∈ 𝑁 ↦ (𝑌‘𝑖)) = 𝑌)
98	12, 90, 97	3eqtrd 2648	1 ⊢ (𝜑 → ((1r‘𝐴) · 𝑌) = 𝑌)

Syntax hints:  ¬ wn 3   → wi 4   ∧ wa 383   = wceq 1475   ∈ wcel 1977  Vcvv 3173  ifcif 4036  ⟨cop 4131   ↦ cmpt 4643   Fn wfn 5799  ⟶wf 5800  ‘cfv 5804  (class class class)co 6549   ↦ cmpt2 6551   ↑_𝑚 cmap 7744  Fincfn 7841  Basecbs 15695  ._rcmulr 15769  0_gc0g 15923   Σ_g cgsu 15924  Mndcmnd 17117  1_rcur 18324  Ringcrg 18370   Mat cmat 20032   maVecMul cmvmul 20165

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-fal 1481  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-ot 4134  df-uni 4373  df-int 4411  df-iun 4457  df-iin 4458  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-se 4998  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-isom 5813  df-riota 6511  df-ov 6552  df-oprab 6553  df-mpt2 6554  df-of 6795  df-om 6958  df-1st 7059  df-2nd 7060  df-supp 7183  df-wrecs 7294  df-recs 7355  df-rdg 7393  df-1o 7447  df-oadd 7451  df-er 7629  df-map 7746  df-ixp 7795  df-en 7842  df-dom 7843  df-sdom 7844  df-fin 7845  df-fsupp 8159  df-sup 8231  df-oi 8298  df-card 8648  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-3 10957  df-4 10958  df-5 10959  df-6 10960  df-7 10961  df-8 10962  df-9 10963  df-n0 11170  df-z 11255  df-dec 11370  df-uz 11564  df-fz 12198  df-fzo 12335  df-seq 12664  df-hash 12980  df-struct 15697  df-ndx 15698  df-slot 15699  df-base 15700  df-sets 15701  df-ress 15702  df-plusg 15781  df-mulr 15782  df-sca 15784  df-vsca 15785  df-ip 15786  df-tset 15787  df-ple 15788  df-ds 15791  df-hom 15793  df-cco 15794  df-0g 15925  df-gsum 15926  df-prds 15931  df-pws 15933  df-mre 16069  df-mrc 16070  df-acs 16072  df-mgm 17065  df-sgrp 17107  df-mnd 17118  df-mhm 17158  df-submnd 17159  df-grp 17248  df-minusg 17249  df-sbg 17250  df-mulg 17364  df-subg 17414  df-ghm 17481  df-cntz 17573  df-cmn 18018  df-abl 18019  df-mgp 18313  df-ur 18325  df-ring 18372  df-subrg 18601  df-lmod 18688  df-lss 18754  df-sra 18993  df-rgmod 18994  df-dsmm 19895  df-frlm 19910  df-mamu 20009  df-mat 20033  df-mvmul 20166

This theorem is referenced by:  slesolinv  20305  slesolinvbi  20306