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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 2760 | . . 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 19630 | . 2 ⊢ 𝑁 = (𝑥 ∈ {𝑝 ∈ 𝐵 ∣ dom (𝑝 ∖ I ) ∈ Fin} ↦ (℩𝑠∃𝑤 ∈ Word 𝑇(𝑥 = (𝐺 Σg 𝑤) ∧ 𝑠 = (-1↑(♯‘𝑤))))) |
| 7 | 1, 2 | sygbasnfpfi 19642 | . . . . . 6 ⊢ ((𝐷 ∈ Fin ∧ 𝑝 ∈ 𝐵) → dom (𝑝 ∖ I ) ∈ Fin) |
| 8 | 7 | ralrimiva 3154 | . . . . 5 ⊢ (𝐷 ∈ Fin → ∀𝑝 ∈ 𝐵 dom (𝑝 ∖ I ) ∈ Fin) |
| 9 | rabid2 3444 | . . . . 5 ⊢ (𝐵 = {𝑝 ∈ 𝐵 ∣ dom (𝑝 ∖ I ) ∈ Fin} ↔ ∀𝑝 ∈ 𝐵 dom (𝑝 ∖ I ) ∈ Fin) | |
| 10 | 8, 9 | sylibr 237 | . . . 4 ⊢ (𝐷 ∈ Fin → 𝐵 = {𝑝 ∈ 𝐵 ∣ dom (𝑝 ∖ I ) ∈ Fin}) |
| 11 | 10 | eqcomd 2766 | . . 3 ⊢ (𝐷 ∈ Fin → {𝑝 ∈ 𝐵 ∣ dom (𝑝 ∖ I ) ∈ Fin} = 𝐵) |
| 12 | 11 | mpteq1d 5195 | . 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 | eqtrid 2807 | 1 ⊢ (𝐷 ∈ Fin → 𝑁 = (𝑥 ∈ 𝐵 ↦ (℩𝑠∃𝑤 ∈ Word 𝑇(𝑥 = (𝐺 Σg 𝑤) ∧ 𝑠 = (-1↑(♯‘𝑤)))))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ∧ wa 401 = wceq 1570 ∈ wcel 2145 ∀wral 3076 ∃wrex 3086 {crab 3412 ∖ cdif 3896 ↦ cmpt 5186 I cid 5549 dom cdm 5655 ran crn 5656 ℩cio 6487 ‘cfv 6533 (class class class)co 7414 Fincfn 8955 1c1 11128 -cneg 11469 ↑cexp 14128 ♯chash 14397 Word cword 14581 Basecbs 17304 Σg cgsu 17528 SymGrpcsymg 19499 pmTrspcpmtr 19571 pmSgncpsgn 19619 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2213 ax-ext 2732 ax-rep 5232 ax-sep 5251 ax-nul 5263 ax-pow 5330 ax-pr 5398 ax-un 7737 ax-cnex 11183 ax-resscn 11184 ax-1cn 11185 ax-icn 11186 ax-addcl 11187 ax-addrcl 11188 ax-mulcl 11189 ax-mulrcl 11190 ax-mulcom 11191 ax-addass 11192 ax-mulass 11193 ax-distr 11194 ax-i2m1 11195 ax-1ne0 11196 ax-1rid 11197 ax-rnegex 11198 ax-rrecex 11199 ax-cnre 11200 ax-pre-lttri 11201 ax-pre-lttrn 11202 ax-pre-ltadd 11203 ax-pre-mulgt0 11204 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3740 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-tp 4589 df-op 4591 df-uni 4868 df-int 4908 df-iun 4953 df-br 5104 df-opab 5168 df-mpt 5187 df-tr 5213 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6299 df-ord 6360 df-on 6361 df-lim 6362 df-suc 6363 df-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 df-riota 7371 df-ov 7417 df-oprab 7418 df-mpo 7419 df-om 7864 df-1st 7987 df-2nd 7988 df-frecs 8281 df-wrecs 8312 df-recs 8361 df-rdg 8400 df-1o 8458 df-er 8699 df-map 8831 df-en 8956 df-dom 8957 df-sdom 8958 df-fin 8959 df-card 9947 df-pnf 11272 df-mnf 11273 df-xr 11274 df-ltxr 11275 df-le 11276 df-sub 11470 df-neg 11471 df-nn 12261 df-2 12330 df-3 12331 df-4 12332 df-5 12333 df-6 12334 df-7 12335 df-8 12336 df-9 12337 df-n0 12532 df-z 12619 df-uz 12891 df-fz 13565 df-fzo 13713 df-hash 14398 df-word 14582 df-struct 17242 df-sets 17259 df-slot 17277 df-ndx 17289 df-base 17305 df-ress 17326 df-plusg 17358 df-tset 17364 df-efmnd 18981 df-symg 19500 df-psgn 19621 |
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