Theorem mamuvs2 20031

Description: Matrix multiplication distributes over scalar multiplication on the left. (Contributed by Stefan O'Rear, 5-Sep-2015.) (Proof shortened by AV, 22-Jul-2019.)

Hypotheses

Ref	Expression
mamuvs2.r	⊢ (𝜑 → 𝑅 ∈ CRing)
mamuvs2.b	⊢ 𝐵 = (Base‘𝑅)
mamuvs2.t	⊢ · = (.r‘𝑅)
mamuvs2.f	⊢ 𝐹 = (𝑅 maMul ⟨𝑀, 𝑁, 𝑂⟩)
mamuvs2.m	⊢ (𝜑 → 𝑀 ∈ Fin)
mamuvs2.n	⊢ (𝜑 → 𝑁 ∈ Fin)
mamuvs2.o	⊢ (𝜑 → 𝑂 ∈ Fin)
mamuvs2.x	⊢ (𝜑 → 𝑋 ∈ (𝐵 ↑𝑚 (𝑀 × 𝑁)))
mamuvs2.y	⊢ (𝜑 → 𝑌 ∈ 𝐵)
mamuvs2.z	⊢ (𝜑 → 𝑍 ∈ (𝐵 ↑𝑚 (𝑁 × 𝑂)))

Assertion

Ref	Expression
mamuvs2	⊢ (𝜑 → (𝑋𝐹(((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍)) = (((𝑀 × 𝑂) × {𝑌}) ∘𝑓 · (𝑋𝐹𝑍)))

Proof of Theorem mamuvs2

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

Step	Hyp	Ref	Expression
1		df-ov 6552	. . . . . . . . . 10 ⊢ (𝑗(((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍)𝑘) = ((((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍)‘⟨𝑗, 𝑘⟩)
2		simpr 476	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → 𝑗 ∈ 𝑁)
3		simplrr 797	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → 𝑘 ∈ 𝑂)
4		opelxpi 5072	. . . . . . . . . . . 12 ⊢ ((𝑗 ∈ 𝑁 ∧ 𝑘 ∈ 𝑂) → ⟨𝑗, 𝑘⟩ ∈ (𝑁 × 𝑂))
5	2, 3, 4	syl2anc 691	. . . . . . . . . . 11 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → ⟨𝑗, 𝑘⟩ ∈ (𝑁 × 𝑂))
6		mamuvs2.n	. . . . . . . . . . . . . 14 ⊢ (𝜑 → 𝑁 ∈ Fin)
7		mamuvs2.o	. . . . . . . . . . . . . 14 ⊢ (𝜑 → 𝑂 ∈ Fin)
8		xpfi 8116	. . . . . . . . . . . . . 14 ⊢ ((𝑁 ∈ Fin ∧ 𝑂 ∈ Fin) → (𝑁 × 𝑂) ∈ Fin)
9	6, 7, 8	syl2anc 691	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝑁 × 𝑂) ∈ Fin)
10	9	ad2antrr 758	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → (𝑁 × 𝑂) ∈ Fin)
11		mamuvs2.y	. . . . . . . . . . . . 13 ⊢ (𝜑 → 𝑌 ∈ 𝐵)
12	11	ad2antrr 758	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → 𝑌 ∈ 𝐵)
13		mamuvs2.z	. . . . . . . . . . . . . 14 ⊢ (𝜑 → 𝑍 ∈ (𝐵 ↑𝑚 (𝑁 × 𝑂)))
14		elmapi 7765	. . . . . . . . . . . . . 14 ⊢ (𝑍 ∈ (𝐵 ↑𝑚 (𝑁 × 𝑂)) → 𝑍:(𝑁 × 𝑂)⟶𝐵)
15		ffn 5958	. . . . . . . . . . . . . 14 ⊢ (𝑍:(𝑁 × 𝑂)⟶𝐵 → 𝑍 Fn (𝑁 × 𝑂))
16	13, 14, 15	3syl 18	. . . . . . . . . . . . 13 ⊢ (𝜑 → 𝑍 Fn (𝑁 × 𝑂))
17	16	ad2antrr 758	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → 𝑍 Fn (𝑁 × 𝑂))
18		df-ov 6552	. . . . . . . . . . . . . 14 ⊢ (𝑗𝑍𝑘) = (𝑍‘⟨𝑗, 𝑘⟩)
19	18	eqcomi 2619	. . . . . . . . . . . . 13 ⊢ (𝑍‘⟨𝑗, 𝑘⟩) = (𝑗𝑍𝑘)
20	19	a1i 11	. . . . . . . . . . . 12 ⊢ ((((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) ∧ ⟨𝑗, 𝑘⟩ ∈ (𝑁 × 𝑂)) → (𝑍‘⟨𝑗, 𝑘⟩) = (𝑗𝑍𝑘))
21	10, 12, 17, 20	ofc1 6818	. . . . . . . . . . 11 ⊢ ((((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) ∧ ⟨𝑗, 𝑘⟩ ∈ (𝑁 × 𝑂)) → ((((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍)‘⟨𝑗, 𝑘⟩) = (𝑌 · (𝑗𝑍𝑘)))
22	5, 21	mpdan 699	. . . . . . . . . 10 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → ((((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍)‘⟨𝑗, 𝑘⟩) = (𝑌 · (𝑗𝑍𝑘)))
23	1, 22	syl5eq 2656	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → (𝑗(((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍)𝑘) = (𝑌 · (𝑗𝑍𝑘)))
24	23	oveq2d 6565	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → ((𝑖𝑋𝑗) · (𝑗(((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍)𝑘)) = ((𝑖𝑋𝑗) · (𝑌 · (𝑗𝑍𝑘))))
25		mamuvs2.r	. . . . . . . . . . 11 ⊢ (𝜑 → 𝑅 ∈ CRing)
26		eqid 2610	. . . . . . . . . . . 12 ⊢ (mulGrp‘𝑅) = (mulGrp‘𝑅)
27	26	crngmgp 18378	. . . . . . . . . . 11 ⊢ (𝑅 ∈ CRing → (mulGrp‘𝑅) ∈ CMnd)
28	25, 27	syl 17	. . . . . . . . . 10 ⊢ (𝜑 → (mulGrp‘𝑅) ∈ CMnd)
29	28	ad2antrr 758	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → (mulGrp‘𝑅) ∈ CMnd)
30		mamuvs2.x	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝑋 ∈ (𝐵 ↑𝑚 (𝑀 × 𝑁)))
31		elmapi 7765	. . . . . . . . . . . 12 ⊢ (𝑋 ∈ (𝐵 ↑𝑚 (𝑀 × 𝑁)) → 𝑋:(𝑀 × 𝑁)⟶𝐵)
32	30, 31	syl 17	. . . . . . . . . . 11 ⊢ (𝜑 → 𝑋:(𝑀 × 𝑁)⟶𝐵)
33	32	ad2antrr 758	. . . . . . . . . 10 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → 𝑋:(𝑀 × 𝑁)⟶𝐵)
34		simplrl 796	. . . . . . . . . 10 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → 𝑖 ∈ 𝑀)
35	33, 34, 2	fovrnd 6704	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → (𝑖𝑋𝑗) ∈ 𝐵)
36	13, 14	syl 17	. . . . . . . . . . 11 ⊢ (𝜑 → 𝑍:(𝑁 × 𝑂)⟶𝐵)
37	36	ad2antrr 758	. . . . . . . . . 10 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → 𝑍:(𝑁 × 𝑂)⟶𝐵)
38	37, 2, 3	fovrnd 6704	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → (𝑗𝑍𝑘) ∈ 𝐵)
39		mamuvs2.b	. . . . . . . . . . 11 ⊢ 𝐵 = (Base‘𝑅)
40	26, 39	mgpbas 18318	. . . . . . . . . 10 ⊢ 𝐵 = (Base‘(mulGrp‘𝑅))
41		mamuvs2.t	. . . . . . . . . . 11 ⊢ · = (.r‘𝑅)
42	26, 41	mgpplusg 18316	. . . . . . . . . 10 ⊢ · = (+g‘(mulGrp‘𝑅))
43	40, 42	cmn12 18036	. . . . . . . . 9 ⊢ (((mulGrp‘𝑅) ∈ CMnd ∧ ((𝑖𝑋𝑗) ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ (𝑗𝑍𝑘) ∈ 𝐵)) → ((𝑖𝑋𝑗) · (𝑌 · (𝑗𝑍𝑘))) = (𝑌 · ((𝑖𝑋𝑗) · (𝑗𝑍𝑘))))
44	29, 35, 12, 38, 43	syl13anc 1320	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → ((𝑖𝑋𝑗) · (𝑌 · (𝑗𝑍𝑘))) = (𝑌 · ((𝑖𝑋𝑗) · (𝑗𝑍𝑘))))
45	24, 44	eqtrd 2644	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → ((𝑖𝑋𝑗) · (𝑗(((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍)𝑘)) = (𝑌 · ((𝑖𝑋𝑗) · (𝑗𝑍𝑘))))
46	45	mpteq2dva 4672	. . . . . 6 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → (𝑗 ∈ 𝑁 ↦ ((𝑖𝑋𝑗) · (𝑗(((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍)𝑘))) = (𝑗 ∈ 𝑁 ↦ (𝑌 · ((𝑖𝑋𝑗) · (𝑗𝑍𝑘)))))
47	46	oveq2d 6565	. . . . 5 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → (𝑅 Σg (𝑗 ∈ 𝑁 ↦ ((𝑖𝑋𝑗) · (𝑗(((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍)𝑘)))) = (𝑅 Σg (𝑗 ∈ 𝑁 ↦ (𝑌 · ((𝑖𝑋𝑗) · (𝑗𝑍𝑘))))))
48		eqid 2610	. . . . . 6 ⊢ (0g‘𝑅) = (0g‘𝑅)
49		eqid 2610	. . . . . 6 ⊢ (+g‘𝑅) = (+g‘𝑅)
50		crngring 18381	. . . . . . . 8 ⊢ (𝑅 ∈ CRing → 𝑅 ∈ Ring)
51	25, 50	syl 17	. . . . . . 7 ⊢ (𝜑 → 𝑅 ∈ Ring)
52	51	adantr 480	. . . . . 6 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → 𝑅 ∈ Ring)
53	6	adantr 480	. . . . . 6 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → 𝑁 ∈ Fin)
54	11	adantr 480	. . . . . 6 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → 𝑌 ∈ 𝐵)
55	51	ad2antrr 758	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → 𝑅 ∈ Ring)
56	39, 41	ringcl 18384	. . . . . . 7 ⊢ ((𝑅 ∈ Ring ∧ (𝑖𝑋𝑗) ∈ 𝐵 ∧ (𝑗𝑍𝑘) ∈ 𝐵) → ((𝑖𝑋𝑗) · (𝑗𝑍𝑘)) ∈ 𝐵)
57	55, 35, 38, 56	syl3anc 1318	. . . . . 6 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → ((𝑖𝑋𝑗) · (𝑗𝑍𝑘)) ∈ 𝐵)
58		eqid 2610	. . . . . . 7 ⊢ (𝑗 ∈ 𝑁 ↦ ((𝑖𝑋𝑗) · (𝑗𝑍𝑘))) = (𝑗 ∈ 𝑁 ↦ ((𝑖𝑋𝑗) · (𝑗𝑍𝑘)))
59		ovex 6577	. . . . . . . 8 ⊢ ((𝑖𝑋𝑗) · (𝑗𝑍𝑘)) ∈ V
60	59	a1i 11	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → ((𝑖𝑋𝑗) · (𝑗𝑍𝑘)) ∈ V)
61		fvex 6113	. . . . . . . 8 ⊢ (0g‘𝑅) ∈ V
62	61	a1i 11	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → (0g‘𝑅) ∈ V)
63	58, 53, 60, 62	fsuppmptdm 8169	. . . . . 6 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → (𝑗 ∈ 𝑁 ↦ ((𝑖𝑋𝑗) · (𝑗𝑍𝑘))) finSupp (0g‘𝑅))
64	39, 48, 49, 41, 52, 53, 54, 57, 63	gsummulc2 18430	. . . . 5 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → (𝑅 Σg (𝑗 ∈ 𝑁 ↦ (𝑌 · ((𝑖𝑋𝑗) · (𝑗𝑍𝑘))))) = (𝑌 · (𝑅 Σg (𝑗 ∈ 𝑁 ↦ ((𝑖𝑋𝑗) · (𝑗𝑍𝑘))))))
65	47, 64	eqtrd 2644	. . . 4 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → (𝑅 Σg (𝑗 ∈ 𝑁 ↦ ((𝑖𝑋𝑗) · (𝑗(((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍)𝑘)))) = (𝑌 · (𝑅 Σg (𝑗 ∈ 𝑁 ↦ ((𝑖𝑋𝑗) · (𝑗𝑍𝑘))))))
66		mamuvs2.f	. . . . 5 ⊢ 𝐹 = (𝑅 maMul ⟨𝑀, 𝑁, 𝑂⟩)
67	25	adantr 480	. . . . 5 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → 𝑅 ∈ CRing)
68		mamuvs2.m	. . . . . 6 ⊢ (𝜑 → 𝑀 ∈ Fin)
69	68	adantr 480	. . . . 5 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → 𝑀 ∈ Fin)
70	7	adantr 480	. . . . 5 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → 𝑂 ∈ Fin)
71	30	adantr 480	. . . . 5 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → 𝑋 ∈ (𝐵 ↑𝑚 (𝑀 × 𝑁)))
72		fconst6g 6007	. . . . . . . . 9 ⊢ (𝑌 ∈ 𝐵 → ((𝑁 × 𝑂) × {𝑌}):(𝑁 × 𝑂)⟶𝐵)
73	11, 72	syl 17	. . . . . . . 8 ⊢ (𝜑 → ((𝑁 × 𝑂) × {𝑌}):(𝑁 × 𝑂)⟶𝐵)
74		fvex 6113	. . . . . . . . . 10 ⊢ (Base‘𝑅) ∈ V
75	39, 74	eqeltri 2684	. . . . . . . . 9 ⊢ 𝐵 ∈ V
76		elmapg 7757	. . . . . . . . 9 ⊢ ((𝐵 ∈ V ∧ (𝑁 × 𝑂) ∈ Fin) → (((𝑁 × 𝑂) × {𝑌}) ∈ (𝐵 ↑𝑚 (𝑁 × 𝑂)) ↔ ((𝑁 × 𝑂) × {𝑌}):(𝑁 × 𝑂)⟶𝐵))
77	75, 9, 76	sylancr 694	. . . . . . . 8 ⊢ (𝜑 → (((𝑁 × 𝑂) × {𝑌}) ∈ (𝐵 ↑𝑚 (𝑁 × 𝑂)) ↔ ((𝑁 × 𝑂) × {𝑌}):(𝑁 × 𝑂)⟶𝐵))
78	73, 77	mpbird 246	. . . . . . 7 ⊢ (𝜑 → ((𝑁 × 𝑂) × {𝑌}) ∈ (𝐵 ↑𝑚 (𝑁 × 𝑂)))
79	39, 41	ringvcl 20023	. . . . . . 7 ⊢ ((𝑅 ∈ Ring ∧ ((𝑁 × 𝑂) × {𝑌}) ∈ (𝐵 ↑𝑚 (𝑁 × 𝑂)) ∧ 𝑍 ∈ (𝐵 ↑𝑚 (𝑁 × 𝑂))) → (((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍) ∈ (𝐵 ↑𝑚 (𝑁 × 𝑂)))
80	51, 78, 13, 79	syl3anc 1318	. . . . . 6 ⊢ (𝜑 → (((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍) ∈ (𝐵 ↑𝑚 (𝑁 × 𝑂)))
81	80	adantr 480	. . . . 5 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → (((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍) ∈ (𝐵 ↑𝑚 (𝑁 × 𝑂)))
82		simprl 790	. . . . 5 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → 𝑖 ∈ 𝑀)
83		simprr 792	. . . . 5 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → 𝑘 ∈ 𝑂)
84	66, 39, 41, 67, 69, 53, 70, 71, 81, 82, 83	mamufv 20012	. . . 4 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → (𝑖(𝑋𝐹(((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍))𝑘) = (𝑅 Σg (𝑗 ∈ 𝑁 ↦ ((𝑖𝑋𝑗) · (𝑗(((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍)𝑘)))))
85		df-ov 6552	. . . . 5 ⊢ (𝑖(((𝑀 × 𝑂) × {𝑌}) ∘𝑓 · (𝑋𝐹𝑍))𝑘) = ((((𝑀 × 𝑂) × {𝑌}) ∘𝑓 · (𝑋𝐹𝑍))‘⟨𝑖, 𝑘⟩)
86		opelxpi 5072	. . . . . . 7 ⊢ ((𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂) → ⟨𝑖, 𝑘⟩ ∈ (𝑀 × 𝑂))
87	86	adantl 481	. . . . . 6 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → ⟨𝑖, 𝑘⟩ ∈ (𝑀 × 𝑂))
88		xpfi 8116	. . . . . . . . 9 ⊢ ((𝑀 ∈ Fin ∧ 𝑂 ∈ Fin) → (𝑀 × 𝑂) ∈ Fin)
89	68, 7, 88	syl2anc 691	. . . . . . . 8 ⊢ (𝜑 → (𝑀 × 𝑂) ∈ Fin)
90	89	adantr 480	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → (𝑀 × 𝑂) ∈ Fin)
91	39, 51, 66, 68, 6, 7, 30, 13	mamucl 20026	. . . . . . . . 9 ⊢ (𝜑 → (𝑋𝐹𝑍) ∈ (𝐵 ↑𝑚 (𝑀 × 𝑂)))
92		elmapi 7765	. . . . . . . . 9 ⊢ ((𝑋𝐹𝑍) ∈ (𝐵 ↑𝑚 (𝑀 × 𝑂)) → (𝑋𝐹𝑍):(𝑀 × 𝑂)⟶𝐵)
93		ffn 5958	. . . . . . . . 9 ⊢ ((𝑋𝐹𝑍):(𝑀 × 𝑂)⟶𝐵 → (𝑋𝐹𝑍) Fn (𝑀 × 𝑂))
94	91, 92, 93	3syl 18	. . . . . . . 8 ⊢ (𝜑 → (𝑋𝐹𝑍) Fn (𝑀 × 𝑂))
95	94	adantr 480	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → (𝑋𝐹𝑍) Fn (𝑀 × 𝑂))
96		df-ov 6552	. . . . . . . . 9 ⊢ (𝑖(𝑋𝐹𝑍)𝑘) = ((𝑋𝐹𝑍)‘⟨𝑖, 𝑘⟩)
97	13	adantr 480	. . . . . . . . . 10 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → 𝑍 ∈ (𝐵 ↑𝑚 (𝑁 × 𝑂)))
98	66, 39, 41, 67, 69, 53, 70, 71, 97, 82, 83	mamufv 20012	. . . . . . . . 9 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → (𝑖(𝑋𝐹𝑍)𝑘) = (𝑅 Σg (𝑗 ∈ 𝑁 ↦ ((𝑖𝑋𝑗) · (𝑗𝑍𝑘)))))
99	96, 98	syl5eqr 2658	. . . . . . . 8 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → ((𝑋𝐹𝑍)‘⟨𝑖, 𝑘⟩) = (𝑅 Σg (𝑗 ∈ 𝑁 ↦ ((𝑖𝑋𝑗) · (𝑗𝑍𝑘)))))
100	99	adantr 480	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ ⟨𝑖, 𝑘⟩ ∈ (𝑀 × 𝑂)) → ((𝑋𝐹𝑍)‘⟨𝑖, 𝑘⟩) = (𝑅 Σg (𝑗 ∈ 𝑁 ↦ ((𝑖𝑋𝑗) · (𝑗𝑍𝑘)))))
101	90, 54, 95, 100	ofc1 6818	. . . . . 6 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ ⟨𝑖, 𝑘⟩ ∈ (𝑀 × 𝑂)) → ((((𝑀 × 𝑂) × {𝑌}) ∘𝑓 · (𝑋𝐹𝑍))‘⟨𝑖, 𝑘⟩) = (𝑌 · (𝑅 Σg (𝑗 ∈ 𝑁 ↦ ((𝑖𝑋𝑗) · (𝑗𝑍𝑘))))))
102	87, 101	mpdan 699	. . . . 5 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → ((((𝑀 × 𝑂) × {𝑌}) ∘𝑓 · (𝑋𝐹𝑍))‘⟨𝑖, 𝑘⟩) = (𝑌 · (𝑅 Σg (𝑗 ∈ 𝑁 ↦ ((𝑖𝑋𝑗) · (𝑗𝑍𝑘))))))
103	85, 102	syl5eq 2656	. . . 4 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → (𝑖(((𝑀 × 𝑂) × {𝑌}) ∘𝑓 · (𝑋𝐹𝑍))𝑘) = (𝑌 · (𝑅 Σg (𝑗 ∈ 𝑁 ↦ ((𝑖𝑋𝑗) · (𝑗𝑍𝑘))))))
104	65, 84, 103	3eqtr4d 2654	. . 3 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → (𝑖(𝑋𝐹(((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍))𝑘) = (𝑖(((𝑀 × 𝑂) × {𝑌}) ∘𝑓 · (𝑋𝐹𝑍))𝑘))
105	104	ralrimivva 2954	. 2 ⊢ (𝜑 → ∀𝑖 ∈ 𝑀 ∀𝑘 ∈ 𝑂 (𝑖(𝑋𝐹(((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍))𝑘) = (𝑖(((𝑀 × 𝑂) × {𝑌}) ∘𝑓 · (𝑋𝐹𝑍))𝑘))
106	39, 51, 66, 68, 6, 7, 30, 80	mamucl 20026	. . . 4 ⊢ (𝜑 → (𝑋𝐹(((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍)) ∈ (𝐵 ↑𝑚 (𝑀 × 𝑂)))
107		elmapi 7765	. . . 4 ⊢ ((𝑋𝐹(((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍)) ∈ (𝐵 ↑𝑚 (𝑀 × 𝑂)) → (𝑋𝐹(((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍)):(𝑀 × 𝑂)⟶𝐵)
108		ffn 5958	. . . 4 ⊢ ((𝑋𝐹(((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍)):(𝑀 × 𝑂)⟶𝐵 → (𝑋𝐹(((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍)) Fn (𝑀 × 𝑂))
109	106, 107, 108	3syl 18	. . 3 ⊢ (𝜑 → (𝑋𝐹(((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍)) Fn (𝑀 × 𝑂))
110		fconst6g 6007	. . . . . . 7 ⊢ (𝑌 ∈ 𝐵 → ((𝑀 × 𝑂) × {𝑌}):(𝑀 × 𝑂)⟶𝐵)
111	11, 110	syl 17	. . . . . 6 ⊢ (𝜑 → ((𝑀 × 𝑂) × {𝑌}):(𝑀 × 𝑂)⟶𝐵)
112		elmapg 7757	. . . . . . 7 ⊢ ((𝐵 ∈ V ∧ (𝑀 × 𝑂) ∈ Fin) → (((𝑀 × 𝑂) × {𝑌}) ∈ (𝐵 ↑𝑚 (𝑀 × 𝑂)) ↔ ((𝑀 × 𝑂) × {𝑌}):(𝑀 × 𝑂)⟶𝐵))
113	75, 89, 112	sylancr 694	. . . . . 6 ⊢ (𝜑 → (((𝑀 × 𝑂) × {𝑌}) ∈ (𝐵 ↑𝑚 (𝑀 × 𝑂)) ↔ ((𝑀 × 𝑂) × {𝑌}):(𝑀 × 𝑂)⟶𝐵))
114	111, 113	mpbird 246	. . . . 5 ⊢ (𝜑 → ((𝑀 × 𝑂) × {𝑌}) ∈ (𝐵 ↑𝑚 (𝑀 × 𝑂)))
115	39, 41	ringvcl 20023	. . . . 5 ⊢ ((𝑅 ∈ Ring ∧ ((𝑀 × 𝑂) × {𝑌}) ∈ (𝐵 ↑𝑚 (𝑀 × 𝑂)) ∧ (𝑋𝐹𝑍) ∈ (𝐵 ↑𝑚 (𝑀 × 𝑂))) → (((𝑀 × 𝑂) × {𝑌}) ∘𝑓 · (𝑋𝐹𝑍)) ∈ (𝐵 ↑𝑚 (𝑀 × 𝑂)))
116	51, 114, 91, 115	syl3anc 1318	. . . 4 ⊢ (𝜑 → (((𝑀 × 𝑂) × {𝑌}) ∘𝑓 · (𝑋𝐹𝑍)) ∈ (𝐵 ↑𝑚 (𝑀 × 𝑂)))
117		elmapi 7765	. . . 4 ⊢ ((((𝑀 × 𝑂) × {𝑌}) ∘𝑓 · (𝑋𝐹𝑍)) ∈ (𝐵 ↑𝑚 (𝑀 × 𝑂)) → (((𝑀 × 𝑂) × {𝑌}) ∘𝑓 · (𝑋𝐹𝑍)):(𝑀 × 𝑂)⟶𝐵)
118		ffn 5958	. . . 4 ⊢ ((((𝑀 × 𝑂) × {𝑌}) ∘𝑓 · (𝑋𝐹𝑍)):(𝑀 × 𝑂)⟶𝐵 → (((𝑀 × 𝑂) × {𝑌}) ∘𝑓 · (𝑋𝐹𝑍)) Fn (𝑀 × 𝑂))
119	116, 117, 118	3syl 18	. . 3 ⊢ (𝜑 → (((𝑀 × 𝑂) × {𝑌}) ∘𝑓 · (𝑋𝐹𝑍)) Fn (𝑀 × 𝑂))
120		eqfnov2 6665	. . 3 ⊢ (((𝑋𝐹(((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍)) Fn (𝑀 × 𝑂) ∧ (((𝑀 × 𝑂) × {𝑌}) ∘𝑓 · (𝑋𝐹𝑍)) Fn (𝑀 × 𝑂)) → ((𝑋𝐹(((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍)) = (((𝑀 × 𝑂) × {𝑌}) ∘𝑓 · (𝑋𝐹𝑍)) ↔ ∀𝑖 ∈ 𝑀 ∀𝑘 ∈ 𝑂 (𝑖(𝑋𝐹(((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍))𝑘) = (𝑖(((𝑀 × 𝑂) × {𝑌}) ∘𝑓 · (𝑋𝐹𝑍))𝑘)))
121	109, 119, 120	syl2anc 691	. 2 ⊢ (𝜑 → ((𝑋𝐹(((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍)) = (((𝑀 × 𝑂) × {𝑌}) ∘𝑓 · (𝑋𝐹𝑍)) ↔ ∀𝑖 ∈ 𝑀 ∀𝑘 ∈ 𝑂 (𝑖(𝑋𝐹(((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍))𝑘) = (𝑖(((𝑀 × 𝑂) × {𝑌}) ∘𝑓 · (𝑋𝐹𝑍))𝑘)))
122	105, 121	mpbird 246	1 ⊢ (𝜑 → (𝑋𝐹(((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍)) = (((𝑀 × 𝑂) × {𝑌}) ∘𝑓 · (𝑋𝐹𝑍)))

Syntax hints:   → wi 4   ↔ wb 195   ∧ wa 383   = wceq 1475   ∈ wcel 1977  ∀wral 2896  Vcvv 3173  {csn 4125  ⟨cop 4131  ⟨cotp 4133   ↦ cmpt 4643   × cxp 5036   Fn wfn 5799  ⟶wf 5800  ‘cfv 5804  (class class class)co 6549   ∘_𝑓 cof 6793   ↑_𝑚 cmap 7744  Fincfn 7841  Basecbs 15695  +_gcplusg 15768  ._rcmulr 15769  0_gc0g 15923   Σ_g cgsu 15924  CMndccmn 18016  mulGrpcmgp 18312  Ringcrg 18370  CRingccrg 18371   maMul cmmul 20008

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-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-ot 4134  df-uni 4373  df-int 4411  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-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-en 7842  df-dom 7843  df-sdom 7844  df-fin 7845  df-fsupp 8159  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-n0 11170  df-z 11255  df-uz 11564  df-fz 12198  df-fzo 12335  df-seq 12664  df-hash 12980  df-ndx 15698  df-slot 15699  df-base 15700  df-sets 15701  df-plusg 15781  df-0g 15925  df-gsum 15926  df-mgm 17065  df-sgrp 17107  df-mnd 17118  df-mhm 17158  df-grp 17248  df-minusg 17249  df-ghm 17481  df-cntz 17573  df-cmn 18018  df-abl 18019  df-mgp 18313  df-ur 18325  df-ring 18372  df-cring 18373  df-mamu 20009

This theorem is referenced by:  matassa  20069