Theorem mamuvs2 20212

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

Step	Hyp	Ref	Expression
1		df-ov 6653	. . . . . . . . . 10 ⊢ (𝑗(((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍)𝑘) = ((((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍)‘⟨𝑗, 𝑘⟩)
2		simpr 477	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → 𝑗 ∈ 𝑁)
3		simplrr 801	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → 𝑘 ∈ 𝑂)
4		opelxpi 5148	. . . . . . . . . . . 12 ⊢ ((𝑗 ∈ 𝑁 ∧ 𝑘 ∈ 𝑂) → ⟨𝑗, 𝑘⟩ ∈ (𝑁 × 𝑂))
5	2, 3, 4	syl2anc 693	. . . . . . . . . . 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 8231	. . . . . . . . . . . . . 14 ⊢ ((𝑁 ∈ Fin ∧ 𝑂 ∈ Fin) → (𝑁 × 𝑂) ∈ Fin)
9	6, 7, 8	syl2anc 693	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝑁 × 𝑂) ∈ Fin)
10	9	ad2antrr 762	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → (𝑁 × 𝑂) ∈ Fin)
11		mamuvs2.y	. . . . . . . . . . . . 13 ⊢ (𝜑 → 𝑌 ∈ 𝐵)
12	11	ad2antrr 762	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → 𝑌 ∈ 𝐵)
13		mamuvs2.z	. . . . . . . . . . . . . 14 ⊢ (𝜑 → 𝑍 ∈ (𝐵 ↑𝑚 (𝑁 × 𝑂)))
14		elmapi 7879	. . . . . . . . . . . . . 14 ⊢ (𝑍 ∈ (𝐵 ↑𝑚 (𝑁 × 𝑂)) → 𝑍:(𝑁 × 𝑂)⟶𝐵)
15		ffn 6045	. . . . . . . . . . . . . 14 ⊢ (𝑍:(𝑁 × 𝑂)⟶𝐵 → 𝑍 Fn (𝑁 × 𝑂))
16	13, 14, 15	3syl 18	. . . . . . . . . . . . 13 ⊢ (𝜑 → 𝑍 Fn (𝑁 × 𝑂))
17	16	ad2antrr 762	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → 𝑍 Fn (𝑁 × 𝑂))
18		df-ov 6653	. . . . . . . . . . . . . 14 ⊢ (𝑗𝑍𝑘) = (𝑍‘⟨𝑗, 𝑘⟩)
19	18	eqcomi 2631	. . . . . . . . . . . . 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 6920	. . . . . . . . . . 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 702	. . . . . . . . . 10 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → ((((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍)‘⟨𝑗, 𝑘⟩) = (𝑌 · (𝑗𝑍𝑘)))
23	1, 22	syl5eq 2668	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → (𝑗(((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍)𝑘) = (𝑌 · (𝑗𝑍𝑘)))
24	23	oveq2d 6666	. . . . . . . 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 2622	. . . . . . . . . . . 12 ⊢ (mulGrp‘𝑅) = (mulGrp‘𝑅)
27	26	crngmgp 18555	. . . . . . . . . . 11 ⊢ (𝑅 ∈ CRing → (mulGrp‘𝑅) ∈ CMnd)
28	25, 27	syl 17	. . . . . . . . . 10 ⊢ (𝜑 → (mulGrp‘𝑅) ∈ CMnd)
29	28	ad2antrr 762	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → (mulGrp‘𝑅) ∈ CMnd)
30		mamuvs2.x	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝑋 ∈ (𝐵 ↑𝑚 (𝑀 × 𝑁)))
31		elmapi 7879	. . . . . . . . . . . 12 ⊢ (𝑋 ∈ (𝐵 ↑𝑚 (𝑀 × 𝑁)) → 𝑋:(𝑀 × 𝑁)⟶𝐵)
32	30, 31	syl 17	. . . . . . . . . . 11 ⊢ (𝜑 → 𝑋:(𝑀 × 𝑁)⟶𝐵)
33	32	ad2antrr 762	. . . . . . . . . 10 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → 𝑋:(𝑀 × 𝑁)⟶𝐵)
34		simplrl 800	. . . . . . . . . 10 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → 𝑖 ∈ 𝑀)
35	33, 34, 2	fovrnd 6806	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → (𝑖𝑋𝑗) ∈ 𝐵)
36	13, 14	syl 17	. . . . . . . . . . 11 ⊢ (𝜑 → 𝑍:(𝑁 × 𝑂)⟶𝐵)
37	36	ad2antrr 762	. . . . . . . . . 10 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → 𝑍:(𝑁 × 𝑂)⟶𝐵)
38	37, 2, 3	fovrnd 6806	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → (𝑗𝑍𝑘) ∈ 𝐵)
39		mamuvs2.b	. . . . . . . . . . 11 ⊢ 𝐵 = (Base‘𝑅)
40	26, 39	mgpbas 18495	. . . . . . . . . 10 ⊢ 𝐵 = (Base‘(mulGrp‘𝑅))
41		mamuvs2.t	. . . . . . . . . . 11 ⊢ · = (.r‘𝑅)
42	26, 41	mgpplusg 18493	. . . . . . . . . 10 ⊢ · = (+g‘(mulGrp‘𝑅))
43	40, 42	cmn12 18213	. . . . . . . . 9 ⊢ (((mulGrp‘𝑅) ∈ CMnd ∧ ((𝑖𝑋𝑗) ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ (𝑗𝑍𝑘) ∈ 𝐵)) → ((𝑖𝑋𝑗) · (𝑌 · (𝑗𝑍𝑘))) = (𝑌 · ((𝑖𝑋𝑗) · (𝑗𝑍𝑘))))
44	29, 35, 12, 38, 43	syl13anc 1328	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → ((𝑖𝑋𝑗) · (𝑌 · (𝑗𝑍𝑘))) = (𝑌 · ((𝑖𝑋𝑗) · (𝑗𝑍𝑘))))
45	24, 44	eqtrd 2656	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → ((𝑖𝑋𝑗) · (𝑗(((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍)𝑘)) = (𝑌 · ((𝑖𝑋𝑗) · (𝑗𝑍𝑘))))
46	45	mpteq2dva 4744	. . . . . 6 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → (𝑗 ∈ 𝑁 ↦ ((𝑖𝑋𝑗) · (𝑗(((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍)𝑘))) = (𝑗 ∈ 𝑁 ↦ (𝑌 · ((𝑖𝑋𝑗) · (𝑗𝑍𝑘)))))
47	46	oveq2d 6666	. . . . 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 2622	. . . . . 6 ⊢ (0g‘𝑅) = (0g‘𝑅)
49		eqid 2622	. . . . . 6 ⊢ (+g‘𝑅) = (+g‘𝑅)
50		crngring 18558	. . . . . . . 8 ⊢ (𝑅 ∈ CRing → 𝑅 ∈ Ring)
51	25, 50	syl 17	. . . . . . 7 ⊢ (𝜑 → 𝑅 ∈ Ring)
52	51	adantr 481	. . . . . 6 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → 𝑅 ∈ Ring)
53	6	adantr 481	. . . . . 6 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → 𝑁 ∈ Fin)
54	11	adantr 481	. . . . . 6 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → 𝑌 ∈ 𝐵)
55	51	ad2antrr 762	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → 𝑅 ∈ Ring)
56	39, 41	ringcl 18561	. . . . . . 7 ⊢ ((𝑅 ∈ Ring ∧ (𝑖𝑋𝑗) ∈ 𝐵 ∧ (𝑗𝑍𝑘) ∈ 𝐵) → ((𝑖𝑋𝑗) · (𝑗𝑍𝑘)) ∈ 𝐵)
57	55, 35, 38, 56	syl3anc 1326	. . . . . 6 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → ((𝑖𝑋𝑗) · (𝑗𝑍𝑘)) ∈ 𝐵)
58		eqid 2622	. . . . . . 7 ⊢ (𝑗 ∈ 𝑁 ↦ ((𝑖𝑋𝑗) · (𝑗𝑍𝑘))) = (𝑗 ∈ 𝑁 ↦ ((𝑖𝑋𝑗) · (𝑗𝑍𝑘)))
59		ovexd 6680	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → ((𝑖𝑋𝑗) · (𝑗𝑍𝑘)) ∈ V)
60		fvex 6201	. . . . . . . 8 ⊢ (0g‘𝑅) ∈ V
61	60	a1i 11	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → (0g‘𝑅) ∈ V)
62	58, 53, 59, 61	fsuppmptdm 8286	. . . . . 6 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → (𝑗 ∈ 𝑁 ↦ ((𝑖𝑋𝑗) · (𝑗𝑍𝑘))) finSupp (0g‘𝑅))
63	39, 48, 49, 41, 52, 53, 54, 57, 62	gsummulc2 18607	. . . . 5 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → (𝑅 Σg (𝑗 ∈ 𝑁 ↦ (𝑌 · ((𝑖𝑋𝑗) · (𝑗𝑍𝑘))))) = (𝑌 · (𝑅 Σg (𝑗 ∈ 𝑁 ↦ ((𝑖𝑋𝑗) · (𝑗𝑍𝑘))))))
64	47, 63	eqtrd 2656	. . . 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))))))
65		mamuvs2.f	. . . . 5 ⊢ 𝐹 = (𝑅 maMul ⟨𝑀, 𝑁, 𝑂⟩)
66	25	adantr 481	. . . . 5 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → 𝑅 ∈ CRing)
67		mamuvs2.m	. . . . . 6 ⊢ (𝜑 → 𝑀 ∈ Fin)
68	67	adantr 481	. . . . 5 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → 𝑀 ∈ Fin)
69	7	adantr 481	. . . . 5 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → 𝑂 ∈ Fin)
70	30	adantr 481	. . . . 5 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → 𝑋 ∈ (𝐵 ↑𝑚 (𝑀 × 𝑁)))
71		fconst6g 6094	. . . . . . . . 9 ⊢ (𝑌 ∈ 𝐵 → ((𝑁 × 𝑂) × {𝑌}):(𝑁 × 𝑂)⟶𝐵)
72	11, 71	syl 17	. . . . . . . 8 ⊢ (𝜑 → ((𝑁 × 𝑂) × {𝑌}):(𝑁 × 𝑂)⟶𝐵)
73		fvex 6201	. . . . . . . . . 10 ⊢ (Base‘𝑅) ∈ V
74	39, 73	eqeltri 2697	. . . . . . . . 9 ⊢ 𝐵 ∈ V
75		elmapg 7870	. . . . . . . . 9 ⊢ ((𝐵 ∈ V ∧ (𝑁 × 𝑂) ∈ Fin) → (((𝑁 × 𝑂) × {𝑌}) ∈ (𝐵 ↑𝑚 (𝑁 × 𝑂)) ↔ ((𝑁 × 𝑂) × {𝑌}):(𝑁 × 𝑂)⟶𝐵))
76	74, 9, 75	sylancr 695	. . . . . . . 8 ⊢ (𝜑 → (((𝑁 × 𝑂) × {𝑌}) ∈ (𝐵 ↑𝑚 (𝑁 × 𝑂)) ↔ ((𝑁 × 𝑂) × {𝑌}):(𝑁 × 𝑂)⟶𝐵))
77	72, 76	mpbird 247	. . . . . . 7 ⊢ (𝜑 → ((𝑁 × 𝑂) × {𝑌}) ∈ (𝐵 ↑𝑚 (𝑁 × 𝑂)))
78	39, 41	ringvcl 20204	. . . . . . 7 ⊢ ((𝑅 ∈ Ring ∧ ((𝑁 × 𝑂) × {𝑌}) ∈ (𝐵 ↑𝑚 (𝑁 × 𝑂)) ∧ 𝑍 ∈ (𝐵 ↑𝑚 (𝑁 × 𝑂))) → (((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍) ∈ (𝐵 ↑𝑚 (𝑁 × 𝑂)))
79	51, 77, 13, 78	syl3anc 1326	. . . . . 6 ⊢ (𝜑 → (((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍) ∈ (𝐵 ↑𝑚 (𝑁 × 𝑂)))
80	79	adantr 481	. . . . 5 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → (((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍) ∈ (𝐵 ↑𝑚 (𝑁 × 𝑂)))
81		simprl 794	. . . . 5 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → 𝑖 ∈ 𝑀)
82		simprr 796	. . . . 5 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → 𝑘 ∈ 𝑂)
83	65, 39, 41, 66, 68, 53, 69, 70, 80, 81, 82	mamufv 20193	. . . 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)))))
84		df-ov 6653	. . . . 5 ⊢ (𝑖(((𝑀 × 𝑂) × {𝑌}) ∘𝑓 · (𝑋𝐹𝑍))𝑘) = ((((𝑀 × 𝑂) × {𝑌}) ∘𝑓 · (𝑋𝐹𝑍))‘⟨𝑖, 𝑘⟩)
85		opelxpi 5148	. . . . . . 7 ⊢ ((𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂) → ⟨𝑖, 𝑘⟩ ∈ (𝑀 × 𝑂))
86	85	adantl 482	. . . . . 6 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → ⟨𝑖, 𝑘⟩ ∈ (𝑀 × 𝑂))
87		xpfi 8231	. . . . . . . . 9 ⊢ ((𝑀 ∈ Fin ∧ 𝑂 ∈ Fin) → (𝑀 × 𝑂) ∈ Fin)
88	67, 7, 87	syl2anc 693	. . . . . . . 8 ⊢ (𝜑 → (𝑀 × 𝑂) ∈ Fin)
89	88	adantr 481	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → (𝑀 × 𝑂) ∈ Fin)
90	39, 51, 65, 67, 6, 7, 30, 13	mamucl 20207	. . . . . . . . 9 ⊢ (𝜑 → (𝑋𝐹𝑍) ∈ (𝐵 ↑𝑚 (𝑀 × 𝑂)))
91		elmapi 7879	. . . . . . . . 9 ⊢ ((𝑋𝐹𝑍) ∈ (𝐵 ↑𝑚 (𝑀 × 𝑂)) → (𝑋𝐹𝑍):(𝑀 × 𝑂)⟶𝐵)
92		ffn 6045	. . . . . . . . 9 ⊢ ((𝑋𝐹𝑍):(𝑀 × 𝑂)⟶𝐵 → (𝑋𝐹𝑍) Fn (𝑀 × 𝑂))
93	90, 91, 92	3syl 18	. . . . . . . 8 ⊢ (𝜑 → (𝑋𝐹𝑍) Fn (𝑀 × 𝑂))
94	93	adantr 481	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → (𝑋𝐹𝑍) Fn (𝑀 × 𝑂))
95		df-ov 6653	. . . . . . . . 9 ⊢ (𝑖(𝑋𝐹𝑍)𝑘) = ((𝑋𝐹𝑍)‘⟨𝑖, 𝑘⟩)
96	13	adantr 481	. . . . . . . . . 10 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → 𝑍 ∈ (𝐵 ↑𝑚 (𝑁 × 𝑂)))
97	65, 39, 41, 66, 68, 53, 69, 70, 96, 81, 82	mamufv 20193	. . . . . . . . 9 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → (𝑖(𝑋𝐹𝑍)𝑘) = (𝑅 Σg (𝑗 ∈ 𝑁 ↦ ((𝑖𝑋𝑗) · (𝑗𝑍𝑘)))))
98	95, 97	syl5eqr 2670	. . . . . . . 8 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → ((𝑋𝐹𝑍)‘⟨𝑖, 𝑘⟩) = (𝑅 Σg (𝑗 ∈ 𝑁 ↦ ((𝑖𝑋𝑗) · (𝑗𝑍𝑘)))))
99	98	adantr 481	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ ⟨𝑖, 𝑘⟩ ∈ (𝑀 × 𝑂)) → ((𝑋𝐹𝑍)‘⟨𝑖, 𝑘⟩) = (𝑅 Σg (𝑗 ∈ 𝑁 ↦ ((𝑖𝑋𝑗) · (𝑗𝑍𝑘)))))
100	89, 54, 94, 99	ofc1 6920	. . . . . 6 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ ⟨𝑖, 𝑘⟩ ∈ (𝑀 × 𝑂)) → ((((𝑀 × 𝑂) × {𝑌}) ∘𝑓 · (𝑋𝐹𝑍))‘⟨𝑖, 𝑘⟩) = (𝑌 · (𝑅 Σg (𝑗 ∈ 𝑁 ↦ ((𝑖𝑋𝑗) · (𝑗𝑍𝑘))))))
101	86, 100	mpdan 702	. . . . 5 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → ((((𝑀 × 𝑂) × {𝑌}) ∘𝑓 · (𝑋𝐹𝑍))‘⟨𝑖, 𝑘⟩) = (𝑌 · (𝑅 Σg (𝑗 ∈ 𝑁 ↦ ((𝑖𝑋𝑗) · (𝑗𝑍𝑘))))))
102	84, 101	syl5eq 2668	. . . 4 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → (𝑖(((𝑀 × 𝑂) × {𝑌}) ∘𝑓 · (𝑋𝐹𝑍))𝑘) = (𝑌 · (𝑅 Σg (𝑗 ∈ 𝑁 ↦ ((𝑖𝑋𝑗) · (𝑗𝑍𝑘))))))
103	64, 83, 102	3eqtr4d 2666	. . 3 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → (𝑖(𝑋𝐹(((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍))𝑘) = (𝑖(((𝑀 × 𝑂) × {𝑌}) ∘𝑓 · (𝑋𝐹𝑍))𝑘))
104	103	ralrimivva 2971	. 2 ⊢ (𝜑 → ∀𝑖 ∈ 𝑀 ∀𝑘 ∈ 𝑂 (𝑖(𝑋𝐹(((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍))𝑘) = (𝑖(((𝑀 × 𝑂) × {𝑌}) ∘𝑓 · (𝑋𝐹𝑍))𝑘))
105	39, 51, 65, 67, 6, 7, 30, 79	mamucl 20207	. . . 4 ⊢ (𝜑 → (𝑋𝐹(((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍)) ∈ (𝐵 ↑𝑚 (𝑀 × 𝑂)))
106		elmapi 7879	. . . 4 ⊢ ((𝑋𝐹(((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍)) ∈ (𝐵 ↑𝑚 (𝑀 × 𝑂)) → (𝑋𝐹(((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍)):(𝑀 × 𝑂)⟶𝐵)
107		ffn 6045	. . . 4 ⊢ ((𝑋𝐹(((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍)):(𝑀 × 𝑂)⟶𝐵 → (𝑋𝐹(((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍)) Fn (𝑀 × 𝑂))
108	105, 106, 107	3syl 18	. . 3 ⊢ (𝜑 → (𝑋𝐹(((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍)) Fn (𝑀 × 𝑂))
109		fconst6g 6094	. . . . . . 7 ⊢ (𝑌 ∈ 𝐵 → ((𝑀 × 𝑂) × {𝑌}):(𝑀 × 𝑂)⟶𝐵)
110	11, 109	syl 17	. . . . . 6 ⊢ (𝜑 → ((𝑀 × 𝑂) × {𝑌}):(𝑀 × 𝑂)⟶𝐵)
111		elmapg 7870	. . . . . . 7 ⊢ ((𝐵 ∈ V ∧ (𝑀 × 𝑂) ∈ Fin) → (((𝑀 × 𝑂) × {𝑌}) ∈ (𝐵 ↑𝑚 (𝑀 × 𝑂)) ↔ ((𝑀 × 𝑂) × {𝑌}):(𝑀 × 𝑂)⟶𝐵))
112	74, 88, 111	sylancr 695	. . . . . 6 ⊢ (𝜑 → (((𝑀 × 𝑂) × {𝑌}) ∈ (𝐵 ↑𝑚 (𝑀 × 𝑂)) ↔ ((𝑀 × 𝑂) × {𝑌}):(𝑀 × 𝑂)⟶𝐵))
113	110, 112	mpbird 247	. . . . 5 ⊢ (𝜑 → ((𝑀 × 𝑂) × {𝑌}) ∈ (𝐵 ↑𝑚 (𝑀 × 𝑂)))
114	39, 41	ringvcl 20204	. . . . 5 ⊢ ((𝑅 ∈ Ring ∧ ((𝑀 × 𝑂) × {𝑌}) ∈ (𝐵 ↑𝑚 (𝑀 × 𝑂)) ∧ (𝑋𝐹𝑍) ∈ (𝐵 ↑𝑚 (𝑀 × 𝑂))) → (((𝑀 × 𝑂) × {𝑌}) ∘𝑓 · (𝑋𝐹𝑍)) ∈ (𝐵 ↑𝑚 (𝑀 × 𝑂)))
115	51, 113, 90, 114	syl3anc 1326	. . . 4 ⊢ (𝜑 → (((𝑀 × 𝑂) × {𝑌}) ∘𝑓 · (𝑋𝐹𝑍)) ∈ (𝐵 ↑𝑚 (𝑀 × 𝑂)))
116		elmapi 7879	. . . 4 ⊢ ((((𝑀 × 𝑂) × {𝑌}) ∘𝑓 · (𝑋𝐹𝑍)) ∈ (𝐵 ↑𝑚 (𝑀 × 𝑂)) → (((𝑀 × 𝑂) × {𝑌}) ∘𝑓 · (𝑋𝐹𝑍)):(𝑀 × 𝑂)⟶𝐵)
117		ffn 6045	. . . 4 ⊢ ((((𝑀 × 𝑂) × {𝑌}) ∘𝑓 · (𝑋𝐹𝑍)):(𝑀 × 𝑂)⟶𝐵 → (((𝑀 × 𝑂) × {𝑌}) ∘𝑓 · (𝑋𝐹𝑍)) Fn (𝑀 × 𝑂))
118	115, 116, 117	3syl 18	. . 3 ⊢ (𝜑 → (((𝑀 × 𝑂) × {𝑌}) ∘𝑓 · (𝑋𝐹𝑍)) Fn (𝑀 × 𝑂))
119		eqfnov2 6767	. . 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)))
120	108, 118, 119	syl2anc 693	. 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)))
121	104, 120	mpbird 247	1 ⊢ (𝜑 → (𝑋𝐹(((𝑁 × 𝑂) × {𝑌}) ∘𝑓 · 𝑍)) = (((𝑀 × 𝑂) × {𝑌}) ∘𝑓 · (𝑋𝐹𝑍)))

Syntax hints:   → wi 4   ↔ wb 196   ∧ wa 384   = wceq 1483   ∈ wcel 1990  ∀wral 2912  Vcvv 3200  {csn 4177  ⟨cop 4183  ⟨cotp 4185   ↦ cmpt 4729   × cxp 5112   Fn wfn 5883  ⟶wf 5884  ‘cfv 5888  (class class class)co 6650   ∘_𝑓 cof 6895   ↑_𝑚 cmap 7857  Fincfn 7955  Basecbs 15857  +_gcplusg 15941  ._rcmulr 15942  0_gc0g 16100   Σ_g cgsu 16101  CMndccmn 18193  mulGrpcmgp 18489  Ringcrg 18547  CRingccrg 18548   maMul cmmul 20189

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-8 1992  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-rep 4771  ax-sep 4781  ax-nul 4789  ax-pow 4843  ax-pr 4906  ax-un 6949  ax-cnex 9992  ax-resscn 9993  ax-1cn 9994  ax-icn 9995  ax-addcl 9996  ax-addrcl 9997  ax-mulcl 9998  ax-mulrcl 9999  ax-mulcom 10000  ax-addass 10001  ax-mulass 10002  ax-distr 10003  ax-i2m1 10004  ax-1ne0 10005  ax-1rid 10006  ax-rnegex 10007  ax-rrecex 10008  ax-cnre 10009  ax-pre-lttri 10010  ax-pre-lttrn 10011  ax-pre-ltadd 10012  ax-pre-mulgt0 10013

This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3or 1038  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ne 2795  df-nel 2898  df-ral 2917  df-rex 2918  df-reu 2919  df-rmo 2920  df-rab 2921  df-v 3202  df-sbc 3436  df-csb 3534  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-pss 3590  df-nul 3916  df-if 4087  df-pw 4160  df-sn 4178  df-pr 4180  df-tp 4182  df-op 4184  df-ot 4186  df-uni 4437  df-int 4476  df-iun 4522  df-br 4654  df-opab 4713  df-mpt 4730  df-tr 4753  df-id 5024  df-eprel 5029  df-po 5035  df-so 5036  df-fr 5073  df-se 5074  df-we 5075  df-xp 5120  df-rel 5121  df-cnv 5122  df-co 5123  df-dm 5124  df-rn 5125  df-res 5126  df-ima 5127  df-pred 5680  df-ord 5726  df-on 5727  df-lim 5728  df-suc 5729  df-iota 5851  df-fun 5890  df-fn 5891  df-f 5892  df-f1 5893  df-fo 5894  df-f1o 5895  df-fv 5896  df-isom 5897  df-riota 6611  df-ov 6653  df-oprab 6654  df-mpt2 6655  df-of 6897  df-om 7066  df-1st 7168  df-2nd 7169  df-supp 7296  df-wrecs 7407  df-recs 7468  df-rdg 7506  df-1o 7560  df-oadd 7564  df-er 7742  df-map 7859  df-en 7956  df-dom 7957  df-sdom 7958  df-fin 7959  df-fsupp 8276  df-oi 8415  df-card 8765  df-pnf 10076  df-mnf 10077  df-xr 10078  df-ltxr 10079  df-le 10080  df-sub 10268  df-neg 10269  df-nn 11021  df-2 11079  df-n0 11293  df-z 11378  df-uz 11688  df-fz 12327  df-fzo 12466  df-seq 12802  df-hash 13118  df-ndx 15860  df-slot 15861  df-base 15863  df-sets 15864  df-plusg 15954  df-0g 16102  df-gsum 16103  df-mgm 17242  df-sgrp 17284  df-mnd 17295  df-mhm 17335  df-grp 17425  df-minusg 17426  df-ghm 17658  df-cntz 17750  df-cmn 18195  df-abl 18196  df-mgp 18490  df-ur 18502  df-ring 18549  df-cring 18550  df-mamu 20190

This theorem is referenced by:  matassa  20250