mdetf - Metamath Proof Explorer

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Theorem mdetf 20401

Description: Functionality of the determinant, see also definition in [Lang] p. 513. (Contributed by Stefan O'Rear, 9-Jul-2018.) (Proof shortened by AV, 23-Jul-2019.)

**Hypotheses**
Ref	Expression
mdetf.d	⊢ 𝐷 = (𝑁 maDet 𝑅)
mdetf.a	⊢ 𝐴 = (𝑁 Mat 𝑅)
mdetf.b	⊢ 𝐵 = (Base‘𝐴)
mdetf.k	⊢ 𝐾 = (Base‘𝑅)

**Assertion**
Ref	Expression
mdetf	⊢ (𝑅 ∈ CRing → 𝐷:𝐵⟶𝐾)

Proof of Theorem mdetf Dummy variables 𝑝 𝑐 𝑚 are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		mdetf.k	. . 3 ⊢ 𝐾 = (Base‘𝑅)
2		crngring 18558	. . . . 5 ⊢ (𝑅 ∈ CRing → 𝑅 ∈ Ring)
3	2	adantr 481	. . . 4 ⊢ ((𝑅 ∈ CRing ∧ 𝑚 ∈ 𝐵) → 𝑅 ∈ Ring)
4		ringcmn 18581	. . . 4 ⊢ (𝑅 ∈ Ring → 𝑅 ∈ CMnd)
5	3, 4	syl 17	. . 3 ⊢ ((𝑅 ∈ CRing ∧ 𝑚 ∈ 𝐵) → 𝑅 ∈ CMnd)
6		mdetf.a	. . . . . . 7 ⊢ 𝐴 = (𝑁 Mat 𝑅)
7		mdetf.b	. . . . . . 7 ⊢ 𝐵 = (Base‘𝐴)
8	6, 7	matrcl 20218	. . . . . 6 ⊢ (𝑚 ∈ 𝐵 → (𝑁 ∈ Fin ∧ 𝑅 ∈ V))
9	8	adantl 482	. . . . 5 ⊢ ((𝑅 ∈ CRing ∧ 𝑚 ∈ 𝐵) → (𝑁 ∈ Fin ∧ 𝑅 ∈ V))
10	9	simpld 475	. . . 4 ⊢ ((𝑅 ∈ CRing ∧ 𝑚 ∈ 𝐵) → 𝑁 ∈ Fin)
11		eqid 2622	. . . . 5 ⊢ (SymGrp‘𝑁) = (SymGrp‘𝑁)
12		eqid 2622	. . . . 5 ⊢ (Base‘(SymGrp‘𝑁)) = (Base‘(SymGrp‘𝑁))
13	11, 12	symgbasfi 17806	. . . 4 ⊢ (𝑁 ∈ Fin → (Base‘(SymGrp‘𝑁)) ∈ Fin)
14	10, 13	syl 17	. . 3 ⊢ ((𝑅 ∈ CRing ∧ 𝑚 ∈ 𝐵) → (Base‘(SymGrp‘𝑁)) ∈ Fin)
15	2	ad2antrr 762	. . . . 5 ⊢ (((𝑅 ∈ CRing ∧ 𝑚 ∈ 𝐵) ∧ 𝑝 ∈ (Base‘(SymGrp‘𝑁))) → 𝑅 ∈ Ring)
16		zrhpsgnmhm 19930	. . . . . . . 8 ⊢ ((𝑅 ∈ Ring ∧ 𝑁 ∈ Fin) → ((ℤRHom‘𝑅) ∘ (pmSgn‘𝑁)) ∈ ((SymGrp‘𝑁) MndHom (mulGrp‘𝑅)))
17	3, 10, 16	syl2anc 693	. . . . . . 7 ⊢ ((𝑅 ∈ CRing ∧ 𝑚 ∈ 𝐵) → ((ℤRHom‘𝑅) ∘ (pmSgn‘𝑁)) ∈ ((SymGrp‘𝑁) MndHom (mulGrp‘𝑅)))
18		eqid 2622	. . . . . . . . 9 ⊢ (mulGrp‘𝑅) = (mulGrp‘𝑅)
19	18, 1	mgpbas 18495	. . . . . . . 8 ⊢ 𝐾 = (Base‘(mulGrp‘𝑅))
20	12, 19	mhmf 17340	. . . . . . 7 ⊢ (((ℤRHom‘𝑅) ∘ (pmSgn‘𝑁)) ∈ ((SymGrp‘𝑁) MndHom (mulGrp‘𝑅)) → ((ℤRHom‘𝑅) ∘ (pmSgn‘𝑁)):(Base‘(SymGrp‘𝑁))⟶𝐾)
21	17, 20	syl 17	. . . . . 6 ⊢ ((𝑅 ∈ CRing ∧ 𝑚 ∈ 𝐵) → ((ℤRHom‘𝑅) ∘ (pmSgn‘𝑁)):(Base‘(SymGrp‘𝑁))⟶𝐾)
22	21	ffvelrnda 6359	. . . . 5 ⊢ (((𝑅 ∈ CRing ∧ 𝑚 ∈ 𝐵) ∧ 𝑝 ∈ (Base‘(SymGrp‘𝑁))) → (((ℤRHom‘𝑅) ∘ (pmSgn‘𝑁))‘𝑝) ∈ 𝐾)
23	18	crngmgp 18555	. . . . . . 7 ⊢ (𝑅 ∈ CRing → (mulGrp‘𝑅) ∈ CMnd)
24	23	ad2antrr 762	. . . . . 6 ⊢ (((𝑅 ∈ CRing ∧ 𝑚 ∈ 𝐵) ∧ 𝑝 ∈ (Base‘(SymGrp‘𝑁))) → (mulGrp‘𝑅) ∈ CMnd)
25	10	adantr 481	. . . . . 6 ⊢ (((𝑅 ∈ CRing ∧ 𝑚 ∈ 𝐵) ∧ 𝑝 ∈ (Base‘(SymGrp‘𝑁))) → 𝑁 ∈ Fin)
26	6, 1, 7	matbas2i 20228	. . . . . . . . . 10 ⊢ (𝑚 ∈ 𝐵 → 𝑚 ∈ (𝐾 ↑_𝑚 (𝑁 × 𝑁)))
27	26	ad3antlr 767	. . . . . . . . 9 ⊢ ((((𝑅 ∈ CRing ∧ 𝑚 ∈ 𝐵) ∧ 𝑝 ∈ (Base‘(SymGrp‘𝑁))) ∧ 𝑐 ∈ 𝑁) → 𝑚 ∈ (𝐾 ↑_𝑚 (𝑁 × 𝑁)))
28		elmapi 7879	. . . . . . . . 9 ⊢ (𝑚 ∈ (𝐾 ↑_𝑚 (𝑁 × 𝑁)) → 𝑚:(𝑁 × 𝑁)⟶𝐾)
29	27, 28	syl 17	. . . . . . . 8 ⊢ ((((𝑅 ∈ CRing ∧ 𝑚 ∈ 𝐵) ∧ 𝑝 ∈ (Base‘(SymGrp‘𝑁))) ∧ 𝑐 ∈ 𝑁) → 𝑚:(𝑁 × 𝑁)⟶𝐾)
30	11, 12	symgbasf 17804	. . . . . . . . . 10 ⊢ (𝑝 ∈ (Base‘(SymGrp‘𝑁)) → 𝑝:𝑁⟶𝑁)
31	30	adantl 482	. . . . . . . . 9 ⊢ (((𝑅 ∈ CRing ∧ 𝑚 ∈ 𝐵) ∧ 𝑝 ∈ (Base‘(SymGrp‘𝑁))) → 𝑝:𝑁⟶𝑁)
32	31	ffvelrnda 6359	. . . . . . . 8 ⊢ ((((𝑅 ∈ CRing ∧ 𝑚 ∈ 𝐵) ∧ 𝑝 ∈ (Base‘(SymGrp‘𝑁))) ∧ 𝑐 ∈ 𝑁) → (𝑝‘𝑐) ∈ 𝑁)
33		simpr 477	. . . . . . . 8 ⊢ ((((𝑅 ∈ CRing ∧ 𝑚 ∈ 𝐵) ∧ 𝑝 ∈ (Base‘(SymGrp‘𝑁))) ∧ 𝑐 ∈ 𝑁) → 𝑐 ∈ 𝑁)
34	29, 32, 33	fovrnd 6806	. . . . . . 7 ⊢ ((((𝑅 ∈ CRing ∧ 𝑚 ∈ 𝐵) ∧ 𝑝 ∈ (Base‘(SymGrp‘𝑁))) ∧ 𝑐 ∈ 𝑁) → ((𝑝‘𝑐)𝑚𝑐) ∈ 𝐾)
35	34	ralrimiva 2966	. . . . . 6 ⊢ (((𝑅 ∈ CRing ∧ 𝑚 ∈ 𝐵) ∧ 𝑝 ∈ (Base‘(SymGrp‘𝑁))) → ∀𝑐 ∈ 𝑁 ((𝑝‘𝑐)𝑚𝑐) ∈ 𝐾)
36	19, 24, 25, 35	gsummptcl 18366	. . . . 5 ⊢ (((𝑅 ∈ CRing ∧ 𝑚 ∈ 𝐵) ∧ 𝑝 ∈ (Base‘(SymGrp‘𝑁))) → ((mulGrp‘𝑅) Σ_g (𝑐 ∈ 𝑁 ↦ ((𝑝‘𝑐)𝑚𝑐))) ∈ 𝐾)
37		eqid 2622	. . . . . 6 ⊢ (._r‘𝑅) = (._r‘𝑅)
38	1, 37	ringcl 18561	. . . . 5 ⊢ ((𝑅 ∈ Ring ∧ (((ℤRHom‘𝑅) ∘ (pmSgn‘𝑁))‘𝑝) ∈ 𝐾 ∧ ((mulGrp‘𝑅) Σ_g (𝑐 ∈ 𝑁 ↦ ((𝑝‘𝑐)𝑚𝑐))) ∈ 𝐾) → ((((ℤRHom‘𝑅) ∘ (pmSgn‘𝑁))‘𝑝)(._r‘𝑅)((mulGrp‘𝑅) Σ_g (𝑐 ∈ 𝑁 ↦ ((𝑝‘𝑐)𝑚𝑐)))) ∈ 𝐾)
39	15, 22, 36, 38	syl3anc 1326	. . . 4 ⊢ (((𝑅 ∈ CRing ∧ 𝑚 ∈ 𝐵) ∧ 𝑝 ∈ (Base‘(SymGrp‘𝑁))) → ((((ℤRHom‘𝑅) ∘ (pmSgn‘𝑁))‘𝑝)(._r‘𝑅)((mulGrp‘𝑅) Σ_g (𝑐 ∈ 𝑁 ↦ ((𝑝‘𝑐)𝑚𝑐)))) ∈ 𝐾)
40	39	ralrimiva 2966	. . 3 ⊢ ((𝑅 ∈ CRing ∧ 𝑚 ∈ 𝐵) → ∀𝑝 ∈ (Base‘(SymGrp‘𝑁))((((ℤRHom‘𝑅) ∘ (pmSgn‘𝑁))‘𝑝)(._r‘𝑅)((mulGrp‘𝑅) Σ_g (𝑐 ∈ 𝑁 ↦ ((𝑝‘𝑐)𝑚𝑐)))) ∈ 𝐾)
41	1, 5, 14, 40	gsummptcl 18366	. 2 ⊢ ((𝑅 ∈ CRing ∧ 𝑚 ∈ 𝐵) → (𝑅 Σ_g (𝑝 ∈ (Base‘(SymGrp‘𝑁)) ↦ ((((ℤRHom‘𝑅) ∘ (pmSgn‘𝑁))‘𝑝)(._r‘𝑅)((mulGrp‘𝑅) Σ_g (𝑐 ∈ 𝑁 ↦ ((𝑝‘𝑐)𝑚𝑐)))))) ∈ 𝐾)
42		mdetf.d	. . 3 ⊢ 𝐷 = (𝑁 maDet 𝑅)
43		eqid 2622	. . 3 ⊢ (ℤRHom‘𝑅) = (ℤRHom‘𝑅)
44		eqid 2622	. . 3 ⊢ (pmSgn‘𝑁) = (pmSgn‘𝑁)
45	42, 6, 7, 12, 43, 44, 37, 18	mdetfval 20392	. 2 ⊢ 𝐷 = (𝑚 ∈ 𝐵 ↦ (𝑅 Σ_g (𝑝 ∈ (Base‘(SymGrp‘𝑁)) ↦ ((((ℤRHom‘𝑅) ∘ (pmSgn‘𝑁))‘𝑝)(._r‘𝑅)((mulGrp‘𝑅) Σ_g (𝑐 ∈ 𝑁 ↦ ((𝑝‘𝑐)𝑚𝑐)))))))
46	41, 45	fmptd 6385	1 ⊢ (𝑅 ∈ CRing → 𝐷:𝐵⟶𝐾)

Colors of variables: wff setvar class

Syntax hints: → wi 4 ∧ wa 384 = wceq 1483 ∈ wcel 1990 Vcvv 3200 ↦ cmpt 4729 × cxp 5112 ∘ ccom 5118 ⟶wf 5884 ‘cfv 5888 (class class class)co 6650 ↑_𝑚 cmap 7857 Fincfn 7955 Basecbs 15857 ._rcmulr 15942 Σ_g cgsu 16101 MndHom cmhm 17333 SymGrpcsymg 17797 pmSgncpsgn 17909 CMndccmn 18193 mulGrpcmgp 18489 Ringcrg 18547 CRingccrg 18548 ℤRHomczrh 19848 Mat cmat 20213 maDet cmdat 20390

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-inf2 8538 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 ax-addf 10015 ax-mulf 10016

This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3or 1038 df-3an 1039 df-xor 1465 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-iin 4523 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-om 7066 df-1st 7168 df-2nd 7169 df-supp 7296 df-tpos 7352 df-wrecs 7407 df-recs 7468 df-rdg 7506 df-1o 7560 df-2o 7561 df-oadd 7564 df-er 7742 df-map 7859 df-pm 7860 df-ixp 7909 df-en 7956 df-dom 7957 df-sdom 7958 df-fin 7959 df-fsupp 8276 df-sup 8348 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-div 10685 df-nn 11021 df-2 11079 df-3 11080 df-4 11081 df-5 11082 df-6 11083 df-7 11084 df-8 11085 df-9 11086 df-n0 11293 df-xnn0 11364 df-z 11378 df-dec 11494 df-uz 11688 df-rp 11833 df-fz 12327 df-fzo 12466 df-seq 12802 df-exp 12861 df-hash 13118 df-word 13299 df-lsw 13300 df-concat 13301 df-s1 13302 df-substr 13303 df-splice 13304 df-reverse 13305 df-s2 13593 df-struct 15859 df-ndx 15860 df-slot 15861 df-base 15863 df-sets 15864 df-ress 15865 df-plusg 15954 df-mulr 15955 df-starv 15956 df-sca 15957 df-vsca 15958 df-ip 15959 df-tset 15960 df-ple 15961 df-ds 15964 df-unif 15965 df-hom 15966 df-cco 15967 df-0g 16102 df-gsum 16103 df-prds 16108 df-pws 16110 df-mre 16246 df-mrc 16247 df-acs 16249 df-mgm 17242 df-sgrp 17284 df-mnd 17295 df-mhm 17335 df-submnd 17336 df-grp 17425 df-minusg 17426 df-mulg 17541 df-subg 17591 df-ghm 17658 df-gim 17701 df-cntz 17750 df-oppg 17776 df-symg 17798 df-pmtr 17862 df-psgn 17911 df-cmn 18195 df-abl 18196 df-mgp 18490 df-ur 18502 df-ring 18549 df-cring 18550 df-oppr 18623 df-dvdsr 18641 df-unit 18642 df-invr 18672 df-dvr 18683 df-rnghom 18715 df-drng 18749 df-subrg 18778 df-sra 19172 df-rgmod 19173 df-cnfld 19747 df-zring 19819 df-zrh 19852 df-dsmm 20076 df-frlm 20091 df-mat 20214 df-mdet 20391

This theorem is referenced by: mdetcl 20402 mdetr0 20411 mdetero 20416 mdetuni0 20427 mdetmul 20429 maduf 20447 madurid 20450 madulid 20451 matunit 20484 cramerimp 20492

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