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Mirrors > Home > MPE Home > Th. List > psgnco | Structured version Visualization version GIF version |
Description: Multiplicativity of the permutation sign function. (Contributed by SO, 9-Jul-2018.) |
Ref | Expression |
---|---|
psgninv.s | ⊢ 𝑆 = (SymGrp‘𝐷) |
psgninv.n | ⊢ 𝑁 = (pmSgn‘𝐷) |
psgninv.p | ⊢ 𝑃 = (Base‘𝑆) |
Ref | Expression |
---|---|
psgnco | ⊢ ((𝐷 ∈ Fin ∧ 𝐹 ∈ 𝑃 ∧ 𝐺 ∈ 𝑃) → (𝑁‘(𝐹 ∘ 𝐺)) = ((𝑁‘𝐹) · (𝑁‘𝐺))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | psgninv.s | . . . . 5 ⊢ 𝑆 = (SymGrp‘𝐷) | |
2 | psgninv.p | . . . . 5 ⊢ 𝑃 = (Base‘𝑆) | |
3 | eqid 2651 | . . . . 5 ⊢ (+g‘𝑆) = (+g‘𝑆) | |
4 | 1, 2, 3 | symgov 17856 | . . . 4 ⊢ ((𝐹 ∈ 𝑃 ∧ 𝐺 ∈ 𝑃) → (𝐹(+g‘𝑆)𝐺) = (𝐹 ∘ 𝐺)) |
5 | 4 | 3adant1 1099 | . . 3 ⊢ ((𝐷 ∈ Fin ∧ 𝐹 ∈ 𝑃 ∧ 𝐺 ∈ 𝑃) → (𝐹(+g‘𝑆)𝐺) = (𝐹 ∘ 𝐺)) |
6 | 5 | fveq2d 6233 | . 2 ⊢ ((𝐷 ∈ Fin ∧ 𝐹 ∈ 𝑃 ∧ 𝐺 ∈ 𝑃) → (𝑁‘(𝐹(+g‘𝑆)𝐺)) = (𝑁‘(𝐹 ∘ 𝐺))) |
7 | psgninv.n | . . . 4 ⊢ 𝑁 = (pmSgn‘𝐷) | |
8 | eqid 2651 | . . . 4 ⊢ ((mulGrp‘ℂfld) ↾s {1, -1}) = ((mulGrp‘ℂfld) ↾s {1, -1}) | |
9 | 1, 7, 8 | psgnghm2 19975 | . . 3 ⊢ (𝐷 ∈ Fin → 𝑁 ∈ (𝑆 GrpHom ((mulGrp‘ℂfld) ↾s {1, -1}))) |
10 | prex 4939 | . . . . 5 ⊢ {1, -1} ∈ V | |
11 | eqid 2651 | . . . . . . 7 ⊢ (mulGrp‘ℂfld) = (mulGrp‘ℂfld) | |
12 | cnfldmul 19800 | . . . . . . 7 ⊢ · = (.r‘ℂfld) | |
13 | 11, 12 | mgpplusg 18539 | . . . . . 6 ⊢ · = (+g‘(mulGrp‘ℂfld)) |
14 | 8, 13 | ressplusg 16040 | . . . . 5 ⊢ ({1, -1} ∈ V → · = (+g‘((mulGrp‘ℂfld) ↾s {1, -1}))) |
15 | 10, 14 | ax-mp 5 | . . . 4 ⊢ · = (+g‘((mulGrp‘ℂfld) ↾s {1, -1})) |
16 | 2, 3, 15 | ghmlin 17712 | . . 3 ⊢ ((𝑁 ∈ (𝑆 GrpHom ((mulGrp‘ℂfld) ↾s {1, -1})) ∧ 𝐹 ∈ 𝑃 ∧ 𝐺 ∈ 𝑃) → (𝑁‘(𝐹(+g‘𝑆)𝐺)) = ((𝑁‘𝐹) · (𝑁‘𝐺))) |
17 | 9, 16 | syl3an1 1399 | . 2 ⊢ ((𝐷 ∈ Fin ∧ 𝐹 ∈ 𝑃 ∧ 𝐺 ∈ 𝑃) → (𝑁‘(𝐹(+g‘𝑆)𝐺)) = ((𝑁‘𝐹) · (𝑁‘𝐺))) |
18 | 6, 17 | eqtr3d 2687 | 1 ⊢ ((𝐷 ∈ Fin ∧ 𝐹 ∈ 𝑃 ∧ 𝐺 ∈ 𝑃) → (𝑁‘(𝐹 ∘ 𝐺)) = ((𝑁‘𝐹) · (𝑁‘𝐺))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ w3a 1054 = wceq 1523 ∈ wcel 2030 Vcvv 3231 {cpr 4212 ∘ ccom 5147 ‘cfv 5926 (class class class)co 6690 Fincfn 7997 1c1 9975 · cmul 9979 -cneg 10305 Basecbs 15904 ↾s cress 15905 +gcplusg 15988 GrpHom cghm 17704 SymGrpcsymg 17843 pmSgncpsgn 17955 mulGrpcmgp 18535 ℂfldccnfld 19794 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1762 ax-4 1777 ax-5 1879 ax-6 1945 ax-7 1981 ax-8 2032 ax-9 2039 ax-10 2059 ax-11 2074 ax-12 2087 ax-13 2282 ax-ext 2631 ax-rep 4804 ax-sep 4814 ax-nul 4822 ax-pow 4873 ax-pr 4936 ax-un 6991 ax-cnex 10030 ax-resscn 10031 ax-1cn 10032 ax-icn 10033 ax-addcl 10034 ax-addrcl 10035 ax-mulcl 10036 ax-mulrcl 10037 ax-mulcom 10038 ax-addass 10039 ax-mulass 10040 ax-distr 10041 ax-i2m1 10042 ax-1ne0 10043 ax-1rid 10044 ax-rnegex 10045 ax-rrecex 10046 ax-cnre 10047 ax-pre-lttri 10048 ax-pre-lttrn 10049 ax-pre-ltadd 10050 ax-pre-mulgt0 10051 ax-addf 10053 ax-mulf 10054 |
This theorem depends on definitions: df-bi 197 df-or 384 df-an 385 df-3or 1055 df-3an 1056 df-xor 1505 df-tru 1526 df-ex 1745 df-nf 1750 df-sb 1938 df-eu 2502 df-mo 2503 df-clab 2638 df-cleq 2644 df-clel 2647 df-nfc 2782 df-ne 2824 df-nel 2927 df-ral 2946 df-rex 2947 df-reu 2948 df-rmo 2949 df-rab 2950 df-v 3233 df-sbc 3469 df-csb 3567 df-dif 3610 df-un 3612 df-in 3614 df-ss 3621 df-pss 3623 df-nul 3949 df-if 4120 df-pw 4193 df-sn 4211 df-pr 4213 df-tp 4215 df-op 4217 df-ot 4219 df-uni 4469 df-int 4508 df-iun 4554 df-iin 4555 df-br 4686 df-opab 4746 df-mpt 4763 df-tr 4786 df-id 5053 df-eprel 5058 df-po 5064 df-so 5065 df-fr 5102 df-se 5103 df-we 5104 df-xp 5149 df-rel 5150 df-cnv 5151 df-co 5152 df-dm 5153 df-rn 5154 df-res 5155 df-ima 5156 df-pred 5718 df-ord 5764 df-on 5765 df-lim 5766 df-suc 5767 df-iota 5889 df-fun 5928 df-fn 5929 df-f 5930 df-f1 5931 df-fo 5932 df-f1o 5933 df-fv 5934 df-isom 5935 df-riota 6651 df-ov 6693 df-oprab 6694 df-mpt2 6695 df-om 7108 df-1st 7210 df-2nd 7211 df-tpos 7397 df-wrecs 7452 df-recs 7513 df-rdg 7551 df-1o 7605 df-2o 7606 df-oadd 7609 df-er 7787 df-map 7901 df-en 7998 df-dom 7999 df-sdom 8000 df-fin 8001 df-card 8803 df-pnf 10114 df-mnf 10115 df-xr 10116 df-ltxr 10117 df-le 10118 df-sub 10306 df-neg 10307 df-div 10723 df-nn 11059 df-2 11117 df-3 11118 df-4 11119 df-5 11120 df-6 11121 df-7 11122 df-8 11123 df-9 11124 df-n0 11331 df-xnn0 11402 df-z 11416 df-dec 11532 df-uz 11726 df-rp 11871 df-fz 12365 df-fzo 12505 df-seq 12842 df-exp 12901 df-hash 13158 df-word 13331 df-lsw 13332 df-concat 13333 df-s1 13334 df-substr 13335 df-splice 13336 df-reverse 13337 df-s2 13639 df-struct 15906 df-ndx 15907 df-slot 15908 df-base 15910 df-sets 15911 df-ress 15912 df-plusg 16001 df-mulr 16002 df-starv 16003 df-tset 16007 df-ple 16008 df-ds 16011 df-unif 16012 df-0g 16149 df-gsum 16150 df-mre 16293 df-mrc 16294 df-acs 16296 df-mgm 17289 df-sgrp 17331 df-mnd 17342 df-mhm 17382 df-submnd 17383 df-grp 17472 df-minusg 17473 df-subg 17638 df-ghm 17705 df-gim 17748 df-oppg 17822 df-symg 17844 df-pmtr 17908 df-psgn 17957 df-cmn 18241 df-abl 18242 df-mgp 18536 df-ur 18548 df-ring 18595 df-cring 18596 df-oppr 18669 df-dvdsr 18687 df-unit 18688 df-invr 18718 df-dvr 18729 df-drng 18797 df-cnfld 19795 |
This theorem is referenced by: psgnfzto1st 29983 mdetpmtr1 30017 madjusmdetlem4 30024 |
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