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Theorem matvscacell 22312

Description: Scalar multiplication in the matrix ring is cell-wise. (Contributed by AV, 7-Aug-2019.)

**Hypotheses**
Ref	Expression
matplusgcell.a	⊢ 𝐴 = (𝑁 Mat 𝑅)
matplusgcell.b	⊢ 𝐵 = (Base‘𝐴)
matvscacell.k	⊢ 𝐾 = (Base‘𝑅)
matvscacell.v	⊢ · = ( ·_𝑠 ‘𝐴)
matvscacell.t	⊢ × = (._r‘𝑅)

**Assertion**
Ref	Expression
matvscacell	⊢ ((𝑅 ∈ Ring ∧ (𝑋 ∈ 𝐾 ∧ 𝑌 ∈ 𝐵) ∧ (𝐼 ∈ 𝑁 ∧ 𝐽 ∈ 𝑁)) → (𝐼(𝑋 · 𝑌)𝐽) = (𝑋 × (𝐼𝑌𝐽)))

**Proof of Theorem matvscacell**
Step	Hyp	Ref	Expression
1		matplusgcell.a	. . . . 5 ⊢ 𝐴 = (𝑁 Mat 𝑅)
2		matplusgcell.b	. . . . 5 ⊢ 𝐵 = (Base‘𝐴)
3		matvscacell.k	. . . . 5 ⊢ 𝐾 = (Base‘𝑅)
4		matvscacell.v	. . . . 5 ⊢ · = ( ·_𝑠 ‘𝐴)
5		matvscacell.t	. . . . 5 ⊢ × = (._r‘𝑅)
6		eqid 2727	. . . . 5 ⊢ (𝑁 × 𝑁) = (𝑁 × 𝑁)
7	1, 2, 3, 4, 5, 6	matvsca2 22304	. . . 4 ⊢ ((𝑋 ∈ 𝐾 ∧ 𝑌 ∈ 𝐵) → (𝑋 · 𝑌) = (((𝑁 × 𝑁) × {𝑋}) ∘_f × 𝑌))
8	7	oveqd 7431	. . 3 ⊢ ((𝑋 ∈ 𝐾 ∧ 𝑌 ∈ 𝐵) → (𝐼(𝑋 · 𝑌)𝐽) = (𝐼(((𝑁 × 𝑁) × {𝑋}) ∘_f × 𝑌)𝐽))
9	8	3ad2ant2 1132	. 2 ⊢ ((𝑅 ∈ Ring ∧ (𝑋 ∈ 𝐾 ∧ 𝑌 ∈ 𝐵) ∧ (𝐼 ∈ 𝑁 ∧ 𝐽 ∈ 𝑁)) → (𝐼(𝑋 · 𝑌)𝐽) = (𝐼(((𝑁 × 𝑁) × {𝑋}) ∘_f × 𝑌)𝐽))
10		df-ov 7417	. . 3 ⊢ (𝐼(((𝑁 × 𝑁) × {𝑋}) ∘_f × 𝑌)𝐽) = ((((𝑁 × 𝑁) × {𝑋}) ∘_f × 𝑌)‘⟨𝐼, 𝐽⟩)
11	10	a1i 11	. 2 ⊢ ((𝑅 ∈ Ring ∧ (𝑋 ∈ 𝐾 ∧ 𝑌 ∈ 𝐵) ∧ (𝐼 ∈ 𝑁 ∧ 𝐽 ∈ 𝑁)) → (𝐼(((𝑁 × 𝑁) × {𝑋}) ∘_f × 𝑌)𝐽) = ((((𝑁 × 𝑁) × {𝑋}) ∘_f × 𝑌)‘⟨𝐼, 𝐽⟩))
12		opelxpi 5709	. . . 4 ⊢ ((𝐼 ∈ 𝑁 ∧ 𝐽 ∈ 𝑁) → ⟨𝐼, 𝐽⟩ ∈ (𝑁 × 𝑁))
13	12	3ad2ant3 1133	. . 3 ⊢ ((𝑅 ∈ Ring ∧ (𝑋 ∈ 𝐾 ∧ 𝑌 ∈ 𝐵) ∧ (𝐼 ∈ 𝑁 ∧ 𝐽 ∈ 𝑁)) → ⟨𝐼, 𝐽⟩ ∈ (𝑁 × 𝑁))
14	1, 2	matrcl 22286	. . . . . . . 8 ⊢ (𝑌 ∈ 𝐵 → (𝑁 ∈ Fin ∧ 𝑅 ∈ V))
15	14	simpld 494	. . . . . . 7 ⊢ (𝑌 ∈ 𝐵 → 𝑁 ∈ Fin)
16	15	adantl 481	. . . . . 6 ⊢ ((𝑋 ∈ 𝐾 ∧ 𝑌 ∈ 𝐵) → 𝑁 ∈ Fin)
17	16	3ad2ant2 1132	. . . . 5 ⊢ ((𝑅 ∈ Ring ∧ (𝑋 ∈ 𝐾 ∧ 𝑌 ∈ 𝐵) ∧ (𝐼 ∈ 𝑁 ∧ 𝐽 ∈ 𝑁)) → 𝑁 ∈ Fin)
18		xpfi 9331	. . . . 5 ⊢ ((𝑁 ∈ Fin ∧ 𝑁 ∈ Fin) → (𝑁 × 𝑁) ∈ Fin)
19	17, 17, 18	syl2anc 583	. . . 4 ⊢ ((𝑅 ∈ Ring ∧ (𝑋 ∈ 𝐾 ∧ 𝑌 ∈ 𝐵) ∧ (𝐼 ∈ 𝑁 ∧ 𝐽 ∈ 𝑁)) → (𝑁 × 𝑁) ∈ Fin)
20		simp2l 1197	. . . 4 ⊢ ((𝑅 ∈ Ring ∧ (𝑋 ∈ 𝐾 ∧ 𝑌 ∈ 𝐵) ∧ (𝐼 ∈ 𝑁 ∧ 𝐽 ∈ 𝑁)) → 𝑋 ∈ 𝐾)
21	2	eleq2i 2820	. . . . . . . . 9 ⊢ (𝑌 ∈ 𝐵 ↔ 𝑌 ∈ (Base‘𝐴))
22	21	biimpi 215	. . . . . . . 8 ⊢ (𝑌 ∈ 𝐵 → 𝑌 ∈ (Base‘𝐴))
23	22	adantl 481	. . . . . . 7 ⊢ ((𝑋 ∈ 𝐾 ∧ 𝑌 ∈ 𝐵) → 𝑌 ∈ (Base‘𝐴))
24	23	3ad2ant2 1132	. . . . . 6 ⊢ ((𝑅 ∈ Ring ∧ (𝑋 ∈ 𝐾 ∧ 𝑌 ∈ 𝐵) ∧ (𝐼 ∈ 𝑁 ∧ 𝐽 ∈ 𝑁)) → 𝑌 ∈ (Base‘𝐴))
25		simp1 1134	. . . . . . 7 ⊢ ((𝑅 ∈ Ring ∧ (𝑋 ∈ 𝐾 ∧ 𝑌 ∈ 𝐵) ∧ (𝐼 ∈ 𝑁 ∧ 𝐽 ∈ 𝑁)) → 𝑅 ∈ Ring)
26		eqid 2727	. . . . . . . 8 ⊢ (Base‘𝑅) = (Base‘𝑅)
27	1, 26	matbas2 22297	. . . . . . 7 ⊢ ((𝑁 ∈ Fin ∧ 𝑅 ∈ Ring) → ((Base‘𝑅) ↑_m (𝑁 × 𝑁)) = (Base‘𝐴))
28	17, 25, 27	syl2anc 583	. . . . . 6 ⊢ ((𝑅 ∈ Ring ∧ (𝑋 ∈ 𝐾 ∧ 𝑌 ∈ 𝐵) ∧ (𝐼 ∈ 𝑁 ∧ 𝐽 ∈ 𝑁)) → ((Base‘𝑅) ↑_m (𝑁 × 𝑁)) = (Base‘𝐴))
29	24, 28	eleqtrrd 2831	. . . . 5 ⊢ ((𝑅 ∈ Ring ∧ (𝑋 ∈ 𝐾 ∧ 𝑌 ∈ 𝐵) ∧ (𝐼 ∈ 𝑁 ∧ 𝐽 ∈ 𝑁)) → 𝑌 ∈ ((Base‘𝑅) ↑_m (𝑁 × 𝑁)))
30		elmapfn 8873	. . . . 5 ⊢ (𝑌 ∈ ((Base‘𝑅) ↑_m (𝑁 × 𝑁)) → 𝑌 Fn (𝑁 × 𝑁))
31	29, 30	syl 17	. . . 4 ⊢ ((𝑅 ∈ Ring ∧ (𝑋 ∈ 𝐾 ∧ 𝑌 ∈ 𝐵) ∧ (𝐼 ∈ 𝑁 ∧ 𝐽 ∈ 𝑁)) → 𝑌 Fn (𝑁 × 𝑁))
32		df-ov 7417	. . . . . 6 ⊢ (𝐼𝑌𝐽) = (𝑌‘⟨𝐼, 𝐽⟩)
33	32	eqcomi 2736	. . . . 5 ⊢ (𝑌‘⟨𝐼, 𝐽⟩) = (𝐼𝑌𝐽)
34	33	a1i 11	. . . 4 ⊢ (((𝑅 ∈ Ring ∧ (𝑋 ∈ 𝐾 ∧ 𝑌 ∈ 𝐵) ∧ (𝐼 ∈ 𝑁 ∧ 𝐽 ∈ 𝑁)) ∧ ⟨𝐼, 𝐽⟩ ∈ (𝑁 × 𝑁)) → (𝑌‘⟨𝐼, 𝐽⟩) = (𝐼𝑌𝐽))
35	19, 20, 31, 34	ofc1 7703	. . 3 ⊢ (((𝑅 ∈ Ring ∧ (𝑋 ∈ 𝐾 ∧ 𝑌 ∈ 𝐵) ∧ (𝐼 ∈ 𝑁 ∧ 𝐽 ∈ 𝑁)) ∧ ⟨𝐼, 𝐽⟩ ∈ (𝑁 × 𝑁)) → ((((𝑁 × 𝑁) × {𝑋}) ∘_f × 𝑌)‘⟨𝐼, 𝐽⟩) = (𝑋 × (𝐼𝑌𝐽)))
36	13, 35	mpdan 686	. 2 ⊢ ((𝑅 ∈ Ring ∧ (𝑋 ∈ 𝐾 ∧ 𝑌 ∈ 𝐵) ∧ (𝐼 ∈ 𝑁 ∧ 𝐽 ∈ 𝑁)) → ((((𝑁 × 𝑁) × {𝑋}) ∘_f × 𝑌)‘⟨𝐼, 𝐽⟩) = (𝑋 × (𝐼𝑌𝐽)))
37	9, 11, 36	3eqtrd 2771	1 ⊢ ((𝑅 ∈ Ring ∧ (𝑋 ∈ 𝐾 ∧ 𝑌 ∈ 𝐵) ∧ (𝐼 ∈ 𝑁 ∧ 𝐽 ∈ 𝑁)) → (𝐼(𝑋 · 𝑌)𝐽) = (𝑋 × (𝐼𝑌𝐽)))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 395 ∧ w3a 1085 = wceq 1534 ∈ wcel 2099 Vcvv 3469 {csn 4624 ⟨cop 4630 × cxp 5670 Fn wfn 6537 ‘cfv 6542 (class class class)co 7414 ∘_f cof 7675 ↑_m cmap 8834 Fincfn 8953 Basecbs 17165 ._rcmulr 17219 ·_𝑠 cvsca 17222 Ringcrg 20157 Mat cmat 22281

This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1790 ax-4 1804 ax-5 1906 ax-6 1964 ax-7 2004 ax-8 2101 ax-9 2109 ax-10 2130 ax-11 2147 ax-12 2164 ax-ext 2698 ax-rep 5279 ax-sep 5293 ax-nul 5300 ax-pow 5359 ax-pr 5423 ax-un 7732 ax-cnex 11180 ax-resscn 11181 ax-1cn 11182 ax-icn 11183 ax-addcl 11184 ax-addrcl 11185 ax-mulcl 11186 ax-mulrcl 11187 ax-mulcom 11188 ax-addass 11189 ax-mulass 11190 ax-distr 11191 ax-i2m1 11192 ax-1ne0 11193 ax-1rid 11194 ax-rnegex 11195 ax-rrecex 11196 ax-cnre 11197 ax-pre-lttri 11198 ax-pre-lttrn 11199 ax-pre-ltadd 11200 ax-pre-mulgt0 11201

This theorem depends on definitions: df-bi 206 df-an 396 df-or 847 df-3or 1086 df-3an 1087 df-tru 1537 df-fal 1547 df-ex 1775 df-nf 1779 df-sb 2061 df-mo 2529 df-eu 2558 df-clab 2705 df-cleq 2719 df-clel 2805 df-nfc 2880 df-ne 2936 df-nel 3042 df-ral 3057 df-rex 3066 df-reu 3372 df-rab 3428 df-v 3471 df-sbc 3775 df-csb 3890 df-dif 3947 df-un 3949 df-in 3951 df-ss 3961 df-pss 3963 df-nul 4319 df-if 4525 df-pw 4600 df-sn 4625 df-pr 4627 df-tp 4629 df-op 4631 df-ot 4633 df-uni 4904 df-iun 4993 df-br 5143 df-opab 5205 df-mpt 5226 df-tr 5260 df-id 5570 df-eprel 5576 df-po 5584 df-so 5585 df-fr 5627 df-we 5629 df-xp 5678 df-rel 5679 df-cnv 5680 df-co 5681 df-dm 5682 df-rn 5683 df-res 5684 df-ima 5685 df-pred 6299 df-ord 6366 df-on 6367 df-lim 6368 df-suc 6369 df-iota 6494 df-fun 6544 df-fn 6545 df-f 6546 df-f1 6547 df-fo 6548 df-f1o 6549 df-fv 6550 df-riota 7370 df-ov 7417 df-oprab 7418 df-mpo 7419 df-of 7677 df-om 7863 df-1st 7985 df-2nd 7986 df-supp 8158 df-frecs 8278 df-wrecs 8309 df-recs 8383 df-rdg 8422 df-1o 8478 df-er 8716 df-map 8836 df-ixp 8906 df-en 8954 df-dom 8955 df-sdom 8956 df-fin 8957 df-fsupp 9376 df-sup 9451 df-pnf 11266 df-mnf 11267 df-xr 11268 df-ltxr 11269 df-le 11270 df-sub 11462 df-neg 11463 df-nn 12229 df-2 12291 df-3 12292 df-4 12293 df-5 12294 df-6 12295 df-7 12296 df-8 12297 df-9 12298 df-n0 12489 df-z 12575 df-dec 12694 df-uz 12839 df-fz 13503 df-struct 17101 df-sets 17118 df-slot 17136 df-ndx 17148 df-base 17166 df-ress 17195 df-plusg 17231 df-mulr 17232 df-sca 17234 df-vsca 17235 df-ip 17236 df-tset 17237 df-ple 17238 df-ds 17240 df-hom 17242 df-cco 17243 df-0g 17408 df-prds 17414 df-pws 17416 df-sra 21040 df-rgmod 21041 df-dsmm 21646 df-frlm 21661 df-mat 22282

This theorem is referenced by: dmatscmcl 22379 scmatscmide 22383 scmatscm 22389 mat2pmatlin 22611 monmatcollpw 22655 pmatcollpwlem 22656 chpmat1dlem 22711 chpdmatlem2 22715 chpdmatlem3 22716

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