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Theorem mamuvs2 21897

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 7408	. . . . . . . . . 10 ⊢ (𝑗(((𝑁 × 𝑂) × {𝑌}) ∘_f · 𝑍)𝑘) = ((((𝑁 × 𝑂) × {𝑌}) ∘_f · 𝑍)‘⟨𝑗, 𝑘⟩)
2		simpr 485	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → 𝑗 ∈ 𝑁)
3		simplrr 776	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → 𝑘 ∈ 𝑂)
4		opelxpi 5712	. . . . . . . . . . . 12 ⊢ ((𝑗 ∈ 𝑁 ∧ 𝑘 ∈ 𝑂) → ⟨𝑗, 𝑘⟩ ∈ (𝑁 × 𝑂))
5	2, 3, 4	syl2anc 584	. . . . . . . . . . 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 9313	. . . . . . . . . . . . . 14 ⊢ ((𝑁 ∈ Fin ∧ 𝑂 ∈ Fin) → (𝑁 × 𝑂) ∈ Fin)
9	6, 7, 8	syl2anc 584	. . . . . . . . . . . . 13 ⊢ (𝜑 → (𝑁 × 𝑂) ∈ Fin)
10	9	ad2antrr 724	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → (𝑁 × 𝑂) ∈ Fin)
11		mamuvs2.y	. . . . . . . . . . . . 13 ⊢ (𝜑 → 𝑌 ∈ 𝐵)
12	11	ad2antrr 724	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → 𝑌 ∈ 𝐵)
13		mamuvs2.z	. . . . . . . . . . . . . 14 ⊢ (𝜑 → 𝑍 ∈ (𝐵 ↑_m (𝑁 × 𝑂)))
14		elmapi 8839	. . . . . . . . . . . . . 14 ⊢ (𝑍 ∈ (𝐵 ↑_m (𝑁 × 𝑂)) → 𝑍:(𝑁 × 𝑂)⟶𝐵)
15		ffn 6714	. . . . . . . . . . . . . 14 ⊢ (𝑍:(𝑁 × 𝑂)⟶𝐵 → 𝑍 Fn (𝑁 × 𝑂))
16	13, 14, 15	3syl 18	. . . . . . . . . . . . 13 ⊢ (𝜑 → 𝑍 Fn (𝑁 × 𝑂))
17	16	ad2antrr 724	. . . . . . . . . . . 12 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → 𝑍 Fn (𝑁 × 𝑂))
18		df-ov 7408	. . . . . . . . . . . . . 14 ⊢ (𝑗𝑍𝑘) = (𝑍‘⟨𝑗, 𝑘⟩)
19	18	eqcomi 2741	. . . . . . . . . . . . 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 7692	. . . . . . . . . . 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 685	. . . . . . . . . 10 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → ((((𝑁 × 𝑂) × {𝑌}) ∘_f · 𝑍)‘⟨𝑗, 𝑘⟩) = (𝑌 · (𝑗𝑍𝑘)))
23	1, 22	eqtrid 2784	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → (𝑗(((𝑁 × 𝑂) × {𝑌}) ∘_f · 𝑍)𝑘) = (𝑌 · (𝑗𝑍𝑘)))
24	23	oveq2d 7421	. . . . . . . 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 2732	. . . . . . . . . . . 12 ⊢ (mulGrp‘𝑅) = (mulGrp‘𝑅)
27	26	crngmgp 20057	. . . . . . . . . . 11 ⊢ (𝑅 ∈ CRing → (mulGrp‘𝑅) ∈ CMnd)
28	25, 27	syl 17	. . . . . . . . . 10 ⊢ (𝜑 → (mulGrp‘𝑅) ∈ CMnd)
29	28	ad2antrr 724	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → (mulGrp‘𝑅) ∈ CMnd)
30		mamuvs2.x	. . . . . . . . . . . 12 ⊢ (𝜑 → 𝑋 ∈ (𝐵 ↑_m (𝑀 × 𝑁)))
31		elmapi 8839	. . . . . . . . . . . 12 ⊢ (𝑋 ∈ (𝐵 ↑_m (𝑀 × 𝑁)) → 𝑋:(𝑀 × 𝑁)⟶𝐵)
32	30, 31	syl 17	. . . . . . . . . . 11 ⊢ (𝜑 → 𝑋:(𝑀 × 𝑁)⟶𝐵)
33	32	ad2antrr 724	. . . . . . . . . 10 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → 𝑋:(𝑀 × 𝑁)⟶𝐵)
34		simplrl 775	. . . . . . . . . 10 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → 𝑖 ∈ 𝑀)
35	33, 34, 2	fovcdmd 7575	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → (𝑖𝑋𝑗) ∈ 𝐵)
36	13, 14	syl 17	. . . . . . . . . . 11 ⊢ (𝜑 → 𝑍:(𝑁 × 𝑂)⟶𝐵)
37	36	ad2antrr 724	. . . . . . . . . 10 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → 𝑍:(𝑁 × 𝑂)⟶𝐵)
38	37, 2, 3	fovcdmd 7575	. . . . . . . . 9 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → (𝑗𝑍𝑘) ∈ 𝐵)
39		mamuvs2.b	. . . . . . . . . . 11 ⊢ 𝐵 = (Base‘𝑅)
40	26, 39	mgpbas 19987	. . . . . . . . . 10 ⊢ 𝐵 = (Base‘(mulGrp‘𝑅))
41		mamuvs2.t	. . . . . . . . . . 11 ⊢ · = (._r‘𝑅)
42	26, 41	mgpplusg 19985	. . . . . . . . . 10 ⊢ · = (+_g‘(mulGrp‘𝑅))
43	40, 42	cmn12 19664	. . . . . . . . 9 ⊢ (((mulGrp‘𝑅) ∈ CMnd ∧ ((𝑖𝑋𝑗) ∈ 𝐵 ∧ 𝑌 ∈ 𝐵 ∧ (𝑗𝑍𝑘) ∈ 𝐵)) → ((𝑖𝑋𝑗) · (𝑌 · (𝑗𝑍𝑘))) = (𝑌 · ((𝑖𝑋𝑗) · (𝑗𝑍𝑘))))
44	29, 35, 12, 38, 43	syl13anc 1372	. . . . . . . 8 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → ((𝑖𝑋𝑗) · (𝑌 · (𝑗𝑍𝑘))) = (𝑌 · ((𝑖𝑋𝑗) · (𝑗𝑍𝑘))))
45	24, 44	eqtrd 2772	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → ((𝑖𝑋𝑗) · (𝑗(((𝑁 × 𝑂) × {𝑌}) ∘_f · 𝑍)𝑘)) = (𝑌 · ((𝑖𝑋𝑗) · (𝑗𝑍𝑘))))
46	45	mpteq2dva 5247	. . . . . 6 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → (𝑗 ∈ 𝑁 ↦ ((𝑖𝑋𝑗) · (𝑗(((𝑁 × 𝑂) × {𝑌}) ∘_f · 𝑍)𝑘))) = (𝑗 ∈ 𝑁 ↦ (𝑌 · ((𝑖𝑋𝑗) · (𝑗𝑍𝑘)))))
47	46	oveq2d 7421	. . . . 5 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → (𝑅 Σ_g (𝑗 ∈ 𝑁 ↦ ((𝑖𝑋𝑗) · (𝑗(((𝑁 × 𝑂) × {𝑌}) ∘_f · 𝑍)𝑘)))) = (𝑅 Σ_g (𝑗 ∈ 𝑁 ↦ (𝑌 · ((𝑖𝑋𝑗) · (𝑗𝑍𝑘))))))
48		eqid 2732	. . . . . 6 ⊢ (0_g‘𝑅) = (0_g‘𝑅)
49		crngring 20061	. . . . . . . 8 ⊢ (𝑅 ∈ CRing → 𝑅 ∈ Ring)
50	25, 49	syl 17	. . . . . . 7 ⊢ (𝜑 → 𝑅 ∈ Ring)
51	50	adantr 481	. . . . . 6 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → 𝑅 ∈ Ring)
52	6	adantr 481	. . . . . 6 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → 𝑁 ∈ Fin)
53	11	adantr 481	. . . . . 6 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → 𝑌 ∈ 𝐵)
54	50	ad2antrr 724	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → 𝑅 ∈ Ring)
55	39, 41, 54, 35, 38	ringcld 20073	. . . . . 6 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → ((𝑖𝑋𝑗) · (𝑗𝑍𝑘)) ∈ 𝐵)
56		eqid 2732	. . . . . . 7 ⊢ (𝑗 ∈ 𝑁 ↦ ((𝑖𝑋𝑗) · (𝑗𝑍𝑘))) = (𝑗 ∈ 𝑁 ↦ ((𝑖𝑋𝑗) · (𝑗𝑍𝑘)))
57		ovexd 7440	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ 𝑗 ∈ 𝑁) → ((𝑖𝑋𝑗) · (𝑗𝑍𝑘)) ∈ V)
58		fvexd 6903	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → (0_g‘𝑅) ∈ V)
59	56, 52, 57, 58	fsuppmptdm 9370	. . . . . 6 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → (𝑗 ∈ 𝑁 ↦ ((𝑖𝑋𝑗) · (𝑗𝑍𝑘))) finSupp (0_g‘𝑅))
60	39, 48, 41, 51, 52, 53, 55, 59	gsummulc2 20122	. . . . 5 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → (𝑅 Σ_g (𝑗 ∈ 𝑁 ↦ (𝑌 · ((𝑖𝑋𝑗) · (𝑗𝑍𝑘))))) = (𝑌 · (𝑅 Σ_g (𝑗 ∈ 𝑁 ↦ ((𝑖𝑋𝑗) · (𝑗𝑍𝑘))))))
61	47, 60	eqtrd 2772	. . . 4 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → (𝑅 Σ_g (𝑗 ∈ 𝑁 ↦ ((𝑖𝑋𝑗) · (𝑗(((𝑁 × 𝑂) × {𝑌}) ∘_f · 𝑍)𝑘)))) = (𝑌 · (𝑅 Σ_g (𝑗 ∈ 𝑁 ↦ ((𝑖𝑋𝑗) · (𝑗𝑍𝑘))))))
62		mamuvs2.f	. . . . 5 ⊢ 𝐹 = (𝑅 maMul ⟨𝑀, 𝑁, 𝑂⟩)
63	25	adantr 481	. . . . 5 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → 𝑅 ∈ CRing)
64		mamuvs2.m	. . . . . 6 ⊢ (𝜑 → 𝑀 ∈ Fin)
65	64	adantr 481	. . . . 5 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → 𝑀 ∈ Fin)
66	7	adantr 481	. . . . 5 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → 𝑂 ∈ Fin)
67	30	adantr 481	. . . . 5 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → 𝑋 ∈ (𝐵 ↑_m (𝑀 × 𝑁)))
68		fconst6g 6777	. . . . . . . . 9 ⊢ (𝑌 ∈ 𝐵 → ((𝑁 × 𝑂) × {𝑌}):(𝑁 × 𝑂)⟶𝐵)
69	11, 68	syl 17	. . . . . . . 8 ⊢ (𝜑 → ((𝑁 × 𝑂) × {𝑌}):(𝑁 × 𝑂)⟶𝐵)
70	39	fvexi 6902	. . . . . . . . 9 ⊢ 𝐵 ∈ V
71		elmapg 8829	. . . . . . . . 9 ⊢ ((𝐵 ∈ V ∧ (𝑁 × 𝑂) ∈ Fin) → (((𝑁 × 𝑂) × {𝑌}) ∈ (𝐵 ↑_m (𝑁 × 𝑂)) ↔ ((𝑁 × 𝑂) × {𝑌}):(𝑁 × 𝑂)⟶𝐵))
72	70, 9, 71	sylancr 587	. . . . . . . 8 ⊢ (𝜑 → (((𝑁 × 𝑂) × {𝑌}) ∈ (𝐵 ↑_m (𝑁 × 𝑂)) ↔ ((𝑁 × 𝑂) × {𝑌}):(𝑁 × 𝑂)⟶𝐵))
73	69, 72	mpbird 256	. . . . . . 7 ⊢ (𝜑 → ((𝑁 × 𝑂) × {𝑌}) ∈ (𝐵 ↑_m (𝑁 × 𝑂)))
74	39, 41	ringvcl 21891	. . . . . . 7 ⊢ ((𝑅 ∈ Ring ∧ ((𝑁 × 𝑂) × {𝑌}) ∈ (𝐵 ↑_m (𝑁 × 𝑂)) ∧ 𝑍 ∈ (𝐵 ↑_m (𝑁 × 𝑂))) → (((𝑁 × 𝑂) × {𝑌}) ∘_f · 𝑍) ∈ (𝐵 ↑_m (𝑁 × 𝑂)))
75	50, 73, 13, 74	syl3anc 1371	. . . . . 6 ⊢ (𝜑 → (((𝑁 × 𝑂) × {𝑌}) ∘_f · 𝑍) ∈ (𝐵 ↑_m (𝑁 × 𝑂)))
76	75	adantr 481	. . . . 5 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → (((𝑁 × 𝑂) × {𝑌}) ∘_f · 𝑍) ∈ (𝐵 ↑_m (𝑁 × 𝑂)))
77		simprl 769	. . . . 5 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → 𝑖 ∈ 𝑀)
78		simprr 771	. . . . 5 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → 𝑘 ∈ 𝑂)
79	62, 39, 41, 63, 65, 52, 66, 67, 76, 77, 78	mamufv 21880	. . . 4 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → (𝑖(𝑋𝐹(((𝑁 × 𝑂) × {𝑌}) ∘_f · 𝑍))𝑘) = (𝑅 Σ_g (𝑗 ∈ 𝑁 ↦ ((𝑖𝑋𝑗) · (𝑗(((𝑁 × 𝑂) × {𝑌}) ∘_f · 𝑍)𝑘)))))
80		df-ov 7408	. . . . 5 ⊢ (𝑖(((𝑀 × 𝑂) × {𝑌}) ∘_f · (𝑋𝐹𝑍))𝑘) = ((((𝑀 × 𝑂) × {𝑌}) ∘_f · (𝑋𝐹𝑍))‘⟨𝑖, 𝑘⟩)
81		opelxpi 5712	. . . . . . 7 ⊢ ((𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂) → ⟨𝑖, 𝑘⟩ ∈ (𝑀 × 𝑂))
82	81	adantl 482	. . . . . 6 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → ⟨𝑖, 𝑘⟩ ∈ (𝑀 × 𝑂))
83		xpfi 9313	. . . . . . . . 9 ⊢ ((𝑀 ∈ Fin ∧ 𝑂 ∈ Fin) → (𝑀 × 𝑂) ∈ Fin)
84	64, 7, 83	syl2anc 584	. . . . . . . 8 ⊢ (𝜑 → (𝑀 × 𝑂) ∈ Fin)
85	84	adantr 481	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → (𝑀 × 𝑂) ∈ Fin)
86	39, 50, 62, 64, 6, 7, 30, 13	mamucl 21892	. . . . . . . . 9 ⊢ (𝜑 → (𝑋𝐹𝑍) ∈ (𝐵 ↑_m (𝑀 × 𝑂)))
87		elmapi 8839	. . . . . . . . 9 ⊢ ((𝑋𝐹𝑍) ∈ (𝐵 ↑_m (𝑀 × 𝑂)) → (𝑋𝐹𝑍):(𝑀 × 𝑂)⟶𝐵)
88		ffn 6714	. . . . . . . . 9 ⊢ ((𝑋𝐹𝑍):(𝑀 × 𝑂)⟶𝐵 → (𝑋𝐹𝑍) Fn (𝑀 × 𝑂))
89	86, 87, 88	3syl 18	. . . . . . . 8 ⊢ (𝜑 → (𝑋𝐹𝑍) Fn (𝑀 × 𝑂))
90	89	adantr 481	. . . . . . 7 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → (𝑋𝐹𝑍) Fn (𝑀 × 𝑂))
91		df-ov 7408	. . . . . . . . 9 ⊢ (𝑖(𝑋𝐹𝑍)𝑘) = ((𝑋𝐹𝑍)‘⟨𝑖, 𝑘⟩)
92	13	adantr 481	. . . . . . . . . 10 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → 𝑍 ∈ (𝐵 ↑_m (𝑁 × 𝑂)))
93	62, 39, 41, 63, 65, 52, 66, 67, 92, 77, 78	mamufv 21880	. . . . . . . . 9 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → (𝑖(𝑋𝐹𝑍)𝑘) = (𝑅 Σ_g (𝑗 ∈ 𝑁 ↦ ((𝑖𝑋𝑗) · (𝑗𝑍𝑘)))))
94	91, 93	eqtr3id 2786	. . . . . . . 8 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → ((𝑋𝐹𝑍)‘⟨𝑖, 𝑘⟩) = (𝑅 Σ_g (𝑗 ∈ 𝑁 ↦ ((𝑖𝑋𝑗) · (𝑗𝑍𝑘)))))
95	94	adantr 481	. . . . . . 7 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ ⟨𝑖, 𝑘⟩ ∈ (𝑀 × 𝑂)) → ((𝑋𝐹𝑍)‘⟨𝑖, 𝑘⟩) = (𝑅 Σ_g (𝑗 ∈ 𝑁 ↦ ((𝑖𝑋𝑗) · (𝑗𝑍𝑘)))))
96	85, 53, 90, 95	ofc1 7692	. . . . . 6 ⊢ (((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) ∧ ⟨𝑖, 𝑘⟩ ∈ (𝑀 × 𝑂)) → ((((𝑀 × 𝑂) × {𝑌}) ∘_f · (𝑋𝐹𝑍))‘⟨𝑖, 𝑘⟩) = (𝑌 · (𝑅 Σ_g (𝑗 ∈ 𝑁 ↦ ((𝑖𝑋𝑗) · (𝑗𝑍𝑘))))))
97	82, 96	mpdan 685	. . . . 5 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → ((((𝑀 × 𝑂) × {𝑌}) ∘_f · (𝑋𝐹𝑍))‘⟨𝑖, 𝑘⟩) = (𝑌 · (𝑅 Σ_g (𝑗 ∈ 𝑁 ↦ ((𝑖𝑋𝑗) · (𝑗𝑍𝑘))))))
98	80, 97	eqtrid 2784	. . . 4 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → (𝑖(((𝑀 × 𝑂) × {𝑌}) ∘_f · (𝑋𝐹𝑍))𝑘) = (𝑌 · (𝑅 Σ_g (𝑗 ∈ 𝑁 ↦ ((𝑖𝑋𝑗) · (𝑗𝑍𝑘))))))
99	61, 79, 98	3eqtr4d 2782	. . 3 ⊢ ((𝜑 ∧ (𝑖 ∈ 𝑀 ∧ 𝑘 ∈ 𝑂)) → (𝑖(𝑋𝐹(((𝑁 × 𝑂) × {𝑌}) ∘_f · 𝑍))𝑘) = (𝑖(((𝑀 × 𝑂) × {𝑌}) ∘_f · (𝑋𝐹𝑍))𝑘))
100	99	ralrimivva 3200	. 2 ⊢ (𝜑 → ∀𝑖 ∈ 𝑀 ∀𝑘 ∈ 𝑂 (𝑖(𝑋𝐹(((𝑁 × 𝑂) × {𝑌}) ∘_f · 𝑍))𝑘) = (𝑖(((𝑀 × 𝑂) × {𝑌}) ∘_f · (𝑋𝐹𝑍))𝑘))
101	39, 50, 62, 64, 6, 7, 30, 75	mamucl 21892	. . . 4 ⊢ (𝜑 → (𝑋𝐹(((𝑁 × 𝑂) × {𝑌}) ∘_f · 𝑍)) ∈ (𝐵 ↑_m (𝑀 × 𝑂)))
102		elmapi 8839	. . . 4 ⊢ ((𝑋𝐹(((𝑁 × 𝑂) × {𝑌}) ∘_f · 𝑍)) ∈ (𝐵 ↑_m (𝑀 × 𝑂)) → (𝑋𝐹(((𝑁 × 𝑂) × {𝑌}) ∘_f · 𝑍)):(𝑀 × 𝑂)⟶𝐵)
103		ffn 6714	. . . 4 ⊢ ((𝑋𝐹(((𝑁 × 𝑂) × {𝑌}) ∘_f · 𝑍)):(𝑀 × 𝑂)⟶𝐵 → (𝑋𝐹(((𝑁 × 𝑂) × {𝑌}) ∘_f · 𝑍)) Fn (𝑀 × 𝑂))
104	101, 102, 103	3syl 18	. . 3 ⊢ (𝜑 → (𝑋𝐹(((𝑁 × 𝑂) × {𝑌}) ∘_f · 𝑍)) Fn (𝑀 × 𝑂))
105		fconst6g 6777	. . . . . . 7 ⊢ (𝑌 ∈ 𝐵 → ((𝑀 × 𝑂) × {𝑌}):(𝑀 × 𝑂)⟶𝐵)
106	11, 105	syl 17	. . . . . 6 ⊢ (𝜑 → ((𝑀 × 𝑂) × {𝑌}):(𝑀 × 𝑂)⟶𝐵)
107		elmapg 8829	. . . . . . 7 ⊢ ((𝐵 ∈ V ∧ (𝑀 × 𝑂) ∈ Fin) → (((𝑀 × 𝑂) × {𝑌}) ∈ (𝐵 ↑_m (𝑀 × 𝑂)) ↔ ((𝑀 × 𝑂) × {𝑌}):(𝑀 × 𝑂)⟶𝐵))
108	70, 84, 107	sylancr 587	. . . . . 6 ⊢ (𝜑 → (((𝑀 × 𝑂) × {𝑌}) ∈ (𝐵 ↑_m (𝑀 × 𝑂)) ↔ ((𝑀 × 𝑂) × {𝑌}):(𝑀 × 𝑂)⟶𝐵))
109	106, 108	mpbird 256	. . . . 5 ⊢ (𝜑 → ((𝑀 × 𝑂) × {𝑌}) ∈ (𝐵 ↑_m (𝑀 × 𝑂)))
110	39, 41	ringvcl 21891	. . . . 5 ⊢ ((𝑅 ∈ Ring ∧ ((𝑀 × 𝑂) × {𝑌}) ∈ (𝐵 ↑_m (𝑀 × 𝑂)) ∧ (𝑋𝐹𝑍) ∈ (𝐵 ↑_m (𝑀 × 𝑂))) → (((𝑀 × 𝑂) × {𝑌}) ∘_f · (𝑋𝐹𝑍)) ∈ (𝐵 ↑_m (𝑀 × 𝑂)))
111	50, 109, 86, 110	syl3anc 1371	. . . 4 ⊢ (𝜑 → (((𝑀 × 𝑂) × {𝑌}) ∘_f · (𝑋𝐹𝑍)) ∈ (𝐵 ↑_m (𝑀 × 𝑂)))
112		elmapi 8839	. . . 4 ⊢ ((((𝑀 × 𝑂) × {𝑌}) ∘_f · (𝑋𝐹𝑍)) ∈ (𝐵 ↑_m (𝑀 × 𝑂)) → (((𝑀 × 𝑂) × {𝑌}) ∘_f · (𝑋𝐹𝑍)):(𝑀 × 𝑂)⟶𝐵)
113		ffn 6714	. . . 4 ⊢ ((((𝑀 × 𝑂) × {𝑌}) ∘_f · (𝑋𝐹𝑍)):(𝑀 × 𝑂)⟶𝐵 → (((𝑀 × 𝑂) × {𝑌}) ∘_f · (𝑋𝐹𝑍)) Fn (𝑀 × 𝑂))
114	111, 112, 113	3syl 18	. . 3 ⊢ (𝜑 → (((𝑀 × 𝑂) × {𝑌}) ∘_f · (𝑋𝐹𝑍)) Fn (𝑀 × 𝑂))
115		eqfnov2 7535	. . 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)))
116	104, 114, 115	syl2anc 584	. 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)))
117	100, 116	mpbird 256	1 ⊢ (𝜑 → (𝑋𝐹(((𝑁 × 𝑂) × {𝑌}) ∘_f · 𝑍)) = (((𝑀 × 𝑂) × {𝑌}) ∘_f · (𝑋𝐹𝑍)))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ↔ wb 205 ∧ wa 396 = wceq 1541 ∈ wcel 2106 ∀wral 3061 Vcvv 3474 {csn 4627 ⟨cop 4633 ⟨cotp 4635 ↦ cmpt 5230 × cxp 5673 Fn wfn 6535 ⟶wf 6536 ‘cfv 6540 (class class class)co 7405 ∘_f cof 7664 ↑_m cmap 8816 Fincfn 8935 Basecbs 17140 ._rcmulr 17194 0_gc0g 17381 Σ_g cgsu 17382 CMndccmn 19642 mulGrpcmgp 19981 Ringcrg 20049 CRingccrg 20050 maMul cmmul 21876

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2703 ax-rep 5284 ax-sep 5298 ax-nul 5305 ax-pow 5362 ax-pr 5426 ax-un 7721 ax-cnex 11162 ax-resscn 11163 ax-1cn 11164 ax-icn 11165 ax-addcl 11166 ax-addrcl 11167 ax-mulcl 11168 ax-mulrcl 11169 ax-mulcom 11170 ax-addass 11171 ax-mulass 11172 ax-distr 11173 ax-i2m1 11174 ax-1ne0 11175 ax-1rid 11176 ax-rnegex 11177 ax-rrecex 11178 ax-cnre 11179 ax-pre-lttri 11180 ax-pre-lttrn 11181 ax-pre-ltadd 11182 ax-pre-mulgt0 11183

This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3or 1088 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2534 df-eu 2563 df-clab 2710 df-cleq 2724 df-clel 2810 df-nfc 2885 df-ne 2941 df-nel 3047 df-ral 3062 df-rex 3071 df-rmo 3376 df-reu 3377 df-rab 3433 df-v 3476 df-sbc 3777 df-csb 3893 df-dif 3950 df-un 3952 df-in 3954 df-ss 3964 df-pss 3966 df-nul 4322 df-if 4528 df-pw 4603 df-sn 4628 df-pr 4630 df-op 4634 df-ot 4636 df-uni 4908 df-int 4950 df-iun 4998 df-br 5148 df-opab 5210 df-mpt 5231 df-tr 5265 df-id 5573 df-eprel 5579 df-po 5587 df-so 5588 df-fr 5630 df-se 5631 df-we 5632 df-xp 5681 df-rel 5682 df-cnv 5683 df-co 5684 df-dm 5685 df-rn 5686 df-res 5687 df-ima 5688 df-pred 6297 df-ord 6364 df-on 6365 df-lim 6366 df-suc 6367 df-iota 6492 df-fun 6542 df-fn 6543 df-f 6544 df-f1 6545 df-fo 6546 df-f1o 6547 df-fv 6548 df-isom 6549 df-riota 7361 df-ov 7408 df-oprab 7409 df-mpo 7410 df-of 7666 df-om 7852 df-1st 7971 df-2nd 7972 df-supp 8143 df-frecs 8262 df-wrecs 8293 df-recs 8367 df-rdg 8406 df-1o 8462 df-er 8699 df-map 8818 df-en 8936 df-dom 8937 df-sdom 8938 df-fin 8939 df-fsupp 9358 df-oi 9501 df-card 9930 df-pnf 11246 df-mnf 11247 df-xr 11248 df-ltxr 11249 df-le 11250 df-sub 11442 df-neg 11443 df-nn 12209 df-2 12271 df-n0 12469 df-z 12555 df-uz 12819 df-fz 13481 df-fzo 13624 df-seq 13963 df-hash 14287 df-sets 17093 df-slot 17111 df-ndx 17123 df-base 17141 df-plusg 17206 df-0g 17383 df-gsum 17384 df-mgm 18557 df-sgrp 18606 df-mnd 18622 df-mhm 18667 df-grp 18818 df-minusg 18819 df-ghm 19084 df-cntz 19175 df-cmn 19644 df-abl 19645 df-mgp 19982 df-ur 19999 df-ring 20051 df-cring 20052 df-mamu 21877

This theorem is referenced by: matassa 21937

W3C validator