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Mirrors > Home > MPE Home > Th. List > psgnfvalfi | Structured version Visualization version GIF version |
Description: Function definition of the permutation sign function for permutations of finite sets. (Contributed by AV, 13-Jan-2019.) |
Ref | Expression |
---|---|
psgnfvalfi.g | ⊢ 𝐺 = (SymGrp‘𝐷) |
psgnfvalfi.b | ⊢ 𝐵 = (Base‘𝐺) |
psgnfvalfi.t | ⊢ 𝑇 = ran (pmTrsp‘𝐷) |
psgnfvalfi.n | ⊢ 𝑁 = (pmSgn‘𝐷) |
Ref | Expression |
---|---|
psgnfvalfi | ⊢ (𝐷 ∈ Fin → 𝑁 = (𝑥 ∈ 𝐵 ↦ (℩𝑠∃𝑤 ∈ Word 𝑇(𝑥 = (𝐺 Σg 𝑤) ∧ 𝑠 = (-1↑(#‘𝑤)))))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | psgnfvalfi.g | . . 3 ⊢ 𝐺 = (SymGrp‘𝐷) | |
2 | psgnfvalfi.b | . . 3 ⊢ 𝐵 = (Base‘𝐺) | |
3 | eqid 2622 | . . 3 ⊢ {𝑝 ∈ 𝐵 ∣ dom (𝑝 ∖ I ) ∈ Fin} = {𝑝 ∈ 𝐵 ∣ dom (𝑝 ∖ I ) ∈ Fin} | |
4 | psgnfvalfi.t | . . 3 ⊢ 𝑇 = ran (pmTrsp‘𝐷) | |
5 | psgnfvalfi.n | . . 3 ⊢ 𝑁 = (pmSgn‘𝐷) | |
6 | 1, 2, 3, 4, 5 | psgnfval 17920 | . 2 ⊢ 𝑁 = (𝑥 ∈ {𝑝 ∈ 𝐵 ∣ dom (𝑝 ∖ I ) ∈ Fin} ↦ (℩𝑠∃𝑤 ∈ Word 𝑇(𝑥 = (𝐺 Σg 𝑤) ∧ 𝑠 = (-1↑(#‘𝑤))))) |
7 | 1, 2 | sygbasnfpfi 17932 | . . . . . 6 ⊢ ((𝐷 ∈ Fin ∧ 𝑝 ∈ 𝐵) → dom (𝑝 ∖ I ) ∈ Fin) |
8 | 7 | ralrimiva 2966 | . . . . 5 ⊢ (𝐷 ∈ Fin → ∀𝑝 ∈ 𝐵 dom (𝑝 ∖ I ) ∈ Fin) |
9 | rabid2 3118 | . . . . 5 ⊢ (𝐵 = {𝑝 ∈ 𝐵 ∣ dom (𝑝 ∖ I ) ∈ Fin} ↔ ∀𝑝 ∈ 𝐵 dom (𝑝 ∖ I ) ∈ Fin) | |
10 | 8, 9 | sylibr 224 | . . . 4 ⊢ (𝐷 ∈ Fin → 𝐵 = {𝑝 ∈ 𝐵 ∣ dom (𝑝 ∖ I ) ∈ Fin}) |
11 | 10 | eqcomd 2628 | . . 3 ⊢ (𝐷 ∈ Fin → {𝑝 ∈ 𝐵 ∣ dom (𝑝 ∖ I ) ∈ Fin} = 𝐵) |
12 | 11 | mpteq1d 4738 | . 2 ⊢ (𝐷 ∈ Fin → (𝑥 ∈ {𝑝 ∈ 𝐵 ∣ dom (𝑝 ∖ I ) ∈ Fin} ↦ (℩𝑠∃𝑤 ∈ Word 𝑇(𝑥 = (𝐺 Σg 𝑤) ∧ 𝑠 = (-1↑(#‘𝑤))))) = (𝑥 ∈ 𝐵 ↦ (℩𝑠∃𝑤 ∈ Word 𝑇(𝑥 = (𝐺 Σg 𝑤) ∧ 𝑠 = (-1↑(#‘𝑤)))))) |
13 | 6, 12 | syl5eq 2668 | 1 ⊢ (𝐷 ∈ Fin → 𝑁 = (𝑥 ∈ 𝐵 ↦ (℩𝑠∃𝑤 ∈ Word 𝑇(𝑥 = (𝐺 Σg 𝑤) ∧ 𝑠 = (-1↑(#‘𝑤)))))) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 384 = wceq 1483 ∈ wcel 1990 ∀wral 2912 ∃wrex 2913 {crab 2916 ∖ cdif 3571 ↦ cmpt 4729 I cid 5023 dom cdm 5114 ran crn 5115 ℩cio 5849 ‘cfv 5888 (class class class)co 6650 Fincfn 7955 1c1 9937 -cneg 10267 ↑cexp 12860 #chash 13117 Word cword 13291 Basecbs 15857 Σg cgsu 16101 SymGrpcsymg 17797 pmTrspcpmtr 17861 pmSgncpsgn 17909 |
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-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 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3or 1038 df-3an 1039 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-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-uni 4437 df-int 4476 df-iun 4522 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-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-riota 6611 df-ov 6653 df-oprab 6654 df-mpt2 6655 df-om 7066 df-1st 7168 df-2nd 7169 df-wrecs 7407 df-recs 7468 df-rdg 7506 df-1o 7560 df-oadd 7564 df-er 7742 df-map 7859 df-en 7956 df-dom 7957 df-sdom 7958 df-fin 7959 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-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-z 11378 df-uz 11688 df-fz 12327 df-fzo 12466 df-hash 13118 df-word 13299 df-struct 15859 df-ndx 15860 df-slot 15861 df-base 15863 df-plusg 15954 df-tset 15960 df-symg 17798 df-psgn 17911 |
This theorem is referenced by: (None) |
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