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Theorem scmatrngiso 22431

Description: There is a ring isomorphism from a ring to the ring of scalar matrices over this ring with positive dimension. (Contributed by AV, 29-Dec-2019.)

**Hypotheses**
Ref	Expression
scmatrhmval.k	⊢ 𝐾 = (Base‘𝑅)
scmatrhmval.a	⊢ 𝐴 = (𝑁 Mat 𝑅)
scmatrhmval.o	⊢ 1 = (1_r‘𝐴)
scmatrhmval.t	⊢ ∗ = ( ·_𝑠 ‘𝐴)
scmatrhmval.f	⊢ 𝐹 = (𝑥 ∈ 𝐾 ↦ (𝑥 ∗ 1 ))
scmatrhmval.c	⊢ 𝐶 = (𝑁 ScMat 𝑅)
scmatghm.s	⊢ 𝑆 = (𝐴 ↾_s 𝐶)

**Assertion**
Ref	Expression
scmatrngiso	⊢ ((𝑁 ∈ Fin ∧ 𝑁 ≠ ∅ ∧ 𝑅 ∈ Ring) → 𝐹 ∈ (𝑅 RingIso 𝑆))

Distinct variable groups: 𝑥,𝐾 𝑥,𝑅 𝑥, 1 𝑥, ∗ 𝑥,𝐶 𝑥,𝑁 Allowed substitution hints: 𝐴(𝑥) 𝑆(𝑥) 𝐹(𝑥)

**Proof of Theorem scmatrngiso**
Step	Hyp	Ref	Expression
1		scmatrhmval.k	. . . 4 ⊢ 𝐾 = (Base‘𝑅)
2		scmatrhmval.a	. . . 4 ⊢ 𝐴 = (𝑁 Mat 𝑅)
3		scmatrhmval.o	. . . 4 ⊢ 1 = (1_r‘𝐴)
4		scmatrhmval.t	. . . 4 ⊢ ∗ = ( ·_𝑠 ‘𝐴)
5		scmatrhmval.f	. . . 4 ⊢ 𝐹 = (𝑥 ∈ 𝐾 ↦ (𝑥 ∗ 1 ))
6		scmatrhmval.c	. . . 4 ⊢ 𝐶 = (𝑁 ScMat 𝑅)
7		scmatghm.s	. . . 4 ⊢ 𝑆 = (𝐴 ↾_s 𝐶)
8	1, 2, 3, 4, 5, 6, 7	scmatrhm 22430	. . 3 ⊢ ((𝑁 ∈ Fin ∧ 𝑅 ∈ Ring) → 𝐹 ∈ (𝑅 RingHom 𝑆))
9	8	3adant2 1129	. 2 ⊢ ((𝑁 ∈ Fin ∧ 𝑁 ≠ ∅ ∧ 𝑅 ∈ Ring) → 𝐹 ∈ (𝑅 RingHom 𝑆))
10	1, 2, 3, 4, 5, 6	scmatf1o 22427	. . 3 ⊢ ((𝑁 ∈ Fin ∧ 𝑁 ≠ ∅ ∧ 𝑅 ∈ Ring) → 𝐹:𝐾–1-1-onto→𝐶)
11	2, 6, 7	scmatstrbas 22421	. . . . 5 ⊢ ((𝑁 ∈ Fin ∧ 𝑅 ∈ Ring) → (Base‘𝑆) = 𝐶)
12	11	3adant2 1129	. . . 4 ⊢ ((𝑁 ∈ Fin ∧ 𝑁 ≠ ∅ ∧ 𝑅 ∈ Ring) → (Base‘𝑆) = 𝐶)
13	12	f1oeq3d 6830	. . 3 ⊢ ((𝑁 ∈ Fin ∧ 𝑁 ≠ ∅ ∧ 𝑅 ∈ Ring) → (𝐹:𝐾–1-1-onto→(Base‘𝑆) ↔ 𝐹:𝐾–1-1-onto→𝐶))
14	10, 13	mpbird 257	. 2 ⊢ ((𝑁 ∈ Fin ∧ 𝑁 ≠ ∅ ∧ 𝑅 ∈ Ring) → 𝐹:𝐾–1-1-onto→(Base‘𝑆))
15		eqid 2728	. . 3 ⊢ (Base‘𝑆) = (Base‘𝑆)
16	1, 15	isrim 20424	. 2 ⊢ (𝐹 ∈ (𝑅 RingIso 𝑆) ↔ (𝐹 ∈ (𝑅 RingHom 𝑆) ∧ 𝐹:𝐾–1-1-onto→(Base‘𝑆)))
17	9, 14, 16	sylanbrc 582	1 ⊢ ((𝑁 ∈ Fin ∧ 𝑁 ≠ ∅ ∧ 𝑅 ∈ Ring) → 𝐹 ∈ (𝑅 RingIso 𝑆))

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ w3a 1085 = wceq 1534 ∈ wcel 2099 ≠ wne 2936 ∅c0 4318 ↦ cmpt 5225 –1-1-onto→wf1o 6541 ‘cfv 6542 (class class class)co 7414 Fincfn 8957 Basecbs 17173 ↾_s cress 17202 ·_𝑠 cvsca 17230 1_rcur 20114 Ringcrg 20166 RingHom crh 20401 RingIso crs 20402 Mat cmat 22300 ScMat cscmat 22384

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 2167 ax-ext 2699 ax-rep 5279 ax-sep 5293 ax-nul 5300 ax-pow 5359 ax-pr 5423 ax-un 7734 ax-cnex 11188 ax-resscn 11189 ax-1cn 11190 ax-icn 11191 ax-addcl 11192 ax-addrcl 11193 ax-mulcl 11194 ax-mulrcl 11195 ax-mulcom 11196 ax-addass 11197 ax-mulass 11198 ax-distr 11199 ax-i2m1 11200 ax-1ne0 11201 ax-1rid 11202 ax-rnegex 11203 ax-rrecex 11204 ax-cnre 11205 ax-pre-lttri 11206 ax-pre-lttrn 11207 ax-pre-ltadd 11208 ax-pre-mulgt0 11209

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 2530 df-eu 2559 df-clab 2706 df-cleq 2720 df-clel 2806 df-nfc 2881 df-ne 2937 df-nel 3043 df-ral 3058 df-rex 3067 df-rmo 3372 df-reu 3373 df-rab 3429 df-v 3472 df-sbc 3776 df-csb 3891 df-dif 3948 df-un 3950 df-in 3952 df-ss 3962 df-pss 3964 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-int 4945 df-iun 4993 df-iin 4994 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-se 5628 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-isom 6551 df-riota 7370 df-ov 7417 df-oprab 7418 df-mpo 7419 df-of 7679 df-om 7865 df-1st 7987 df-2nd 7988 df-supp 8160 df-frecs 8280 df-wrecs 8311 df-recs 8385 df-rdg 8424 df-1o 8480 df-er 8718 df-map 8840 df-ixp 8910 df-en 8958 df-dom 8959 df-sdom 8960 df-fin 8961 df-fsupp 9380 df-sup 9459 df-oi 9527 df-card 9956 df-pnf 11274 df-mnf 11275 df-xr 11276 df-ltxr 11277 df-le 11278 df-sub 11470 df-neg 11471 df-nn 12237 df-2 12299 df-3 12300 df-4 12301 df-5 12302 df-6 12303 df-7 12304 df-8 12305 df-9 12306 df-n0 12497 df-z 12583 df-dec 12702 df-uz 12847 df-fz 13511 df-fzo 13654 df-seq 13993 df-hash 14316 df-struct 17109 df-sets 17126 df-slot 17144 df-ndx 17156 df-base 17174 df-ress 17203 df-plusg 17239 df-mulr 17240 df-sca 17242 df-vsca 17243 df-ip 17244 df-tset 17245 df-ple 17246 df-ds 17248 df-hom 17250 df-cco 17251 df-0g 17416 df-gsum 17417 df-prds 17422 df-pws 17424 df-mre 17559 df-mrc 17560 df-acs 17562 df-mgm 18593 df-sgrp 18672 df-mnd 18688 df-mhm 18733 df-submnd 18734 df-grp 18886 df-minusg 18887 df-sbg 18888 df-mulg 19017 df-subg 19071 df-ghm 19161 df-cntz 19261 df-cmn 19730 df-abl 19731 df-mgp 20068 df-rng 20086 df-ur 20115 df-ring 20168 df-rhm 20404 df-rim 20405 df-subrng 20476 df-subrg 20501 df-lmod 20738 df-lss 20809 df-sra 21051 df-rgmod 21052 df-dsmm 21659 df-frlm 21674 df-mamu 22279 df-mat 22301 df-dmat 22385 df-scmat 22386

This theorem is referenced by: scmatric 22432

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