Mathbox for Thierry Arnoux |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > odpmco | Structured version Visualization version GIF version |
Description: The composition of two odd permutations is even. (Contributed by Thierry Arnoux, 15-Oct-2023.) |
Ref | Expression |
---|---|
odpmco.s | ⊢ 𝑆 = (SymGrp‘𝐷) |
odpmco.b | ⊢ 𝐵 = (Base‘𝑆) |
odpmco.a | ⊢ 𝐴 = (pmEven‘𝐷) |
Ref | Expression |
---|---|
odpmco | ⊢ ((𝐷 ∈ Fin ∧ 𝑋 ∈ (𝐵 ∖ 𝐴) ∧ 𝑌 ∈ (𝐵 ∖ 𝐴)) → (𝑋 ∘ 𝑌) ∈ 𝐴) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | simp1 1134 | . . 3 ⊢ ((𝐷 ∈ Fin ∧ 𝑋 ∈ (𝐵 ∖ 𝐴) ∧ 𝑌 ∈ (𝐵 ∖ 𝐴)) → 𝐷 ∈ Fin) | |
2 | simp2 1135 | . . . . . 6 ⊢ ((𝐷 ∈ Fin ∧ 𝑋 ∈ (𝐵 ∖ 𝐴) ∧ 𝑌 ∈ (𝐵 ∖ 𝐴)) → 𝑋 ∈ (𝐵 ∖ 𝐴)) | |
3 | 2 | eldifad 3903 | . . . . 5 ⊢ ((𝐷 ∈ Fin ∧ 𝑋 ∈ (𝐵 ∖ 𝐴) ∧ 𝑌 ∈ (𝐵 ∖ 𝐴)) → 𝑋 ∈ 𝐵) |
4 | simp3 1136 | . . . . . 6 ⊢ ((𝐷 ∈ Fin ∧ 𝑋 ∈ (𝐵 ∖ 𝐴) ∧ 𝑌 ∈ (𝐵 ∖ 𝐴)) → 𝑌 ∈ (𝐵 ∖ 𝐴)) | |
5 | 4 | eldifad 3903 | . . . . 5 ⊢ ((𝐷 ∈ Fin ∧ 𝑋 ∈ (𝐵 ∖ 𝐴) ∧ 𝑌 ∈ (𝐵 ∖ 𝐴)) → 𝑌 ∈ 𝐵) |
6 | odpmco.s | . . . . . 6 ⊢ 𝑆 = (SymGrp‘𝐷) | |
7 | odpmco.b | . . . . . 6 ⊢ 𝐵 = (Base‘𝑆) | |
8 | eqid 2739 | . . . . . 6 ⊢ (+g‘𝑆) = (+g‘𝑆) | |
9 | 6, 7, 8 | symgov 18972 | . . . . 5 ⊢ ((𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋(+g‘𝑆)𝑌) = (𝑋 ∘ 𝑌)) |
10 | 3, 5, 9 | syl2anc 583 | . . . 4 ⊢ ((𝐷 ∈ Fin ∧ 𝑋 ∈ (𝐵 ∖ 𝐴) ∧ 𝑌 ∈ (𝐵 ∖ 𝐴)) → (𝑋(+g‘𝑆)𝑌) = (𝑋 ∘ 𝑌)) |
11 | 6, 7, 8 | symgcl 18973 | . . . . 5 ⊢ ((𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → (𝑋(+g‘𝑆)𝑌) ∈ 𝐵) |
12 | 3, 5, 11 | syl2anc 583 | . . . 4 ⊢ ((𝐷 ∈ Fin ∧ 𝑋 ∈ (𝐵 ∖ 𝐴) ∧ 𝑌 ∈ (𝐵 ∖ 𝐴)) → (𝑋(+g‘𝑆)𝑌) ∈ 𝐵) |
13 | 10, 12 | eqeltrrd 2841 | . . 3 ⊢ ((𝐷 ∈ Fin ∧ 𝑋 ∈ (𝐵 ∖ 𝐴) ∧ 𝑌 ∈ (𝐵 ∖ 𝐴)) → (𝑋 ∘ 𝑌) ∈ 𝐵) |
14 | eqid 2739 | . . . . . 6 ⊢ (pmSgn‘𝐷) = (pmSgn‘𝐷) | |
15 | 6, 14, 7 | psgnco 20769 | . . . . 5 ⊢ ((𝐷 ∈ Fin ∧ 𝑋 ∈ 𝐵 ∧ 𝑌 ∈ 𝐵) → ((pmSgn‘𝐷)‘(𝑋 ∘ 𝑌)) = (((pmSgn‘𝐷)‘𝑋) · ((pmSgn‘𝐷)‘𝑌))) |
16 | 1, 3, 5, 15 | syl3anc 1369 | . . . 4 ⊢ ((𝐷 ∈ Fin ∧ 𝑋 ∈ (𝐵 ∖ 𝐴) ∧ 𝑌 ∈ (𝐵 ∖ 𝐴)) → ((pmSgn‘𝐷)‘(𝑋 ∘ 𝑌)) = (((pmSgn‘𝐷)‘𝑋) · ((pmSgn‘𝐷)‘𝑌))) |
17 | odpmco.a | . . . . . . . . . 10 ⊢ 𝐴 = (pmEven‘𝐷) | |
18 | 17 | a1i 11 | . . . . . . . . 9 ⊢ ((𝐷 ∈ Fin ∧ 𝑋 ∈ (𝐵 ∖ 𝐴) ∧ 𝑌 ∈ (𝐵 ∖ 𝐴)) → 𝐴 = (pmEven‘𝐷)) |
19 | 18 | difeq2d 4061 | . . . . . . . 8 ⊢ ((𝐷 ∈ Fin ∧ 𝑋 ∈ (𝐵 ∖ 𝐴) ∧ 𝑌 ∈ (𝐵 ∖ 𝐴)) → (𝐵 ∖ 𝐴) = (𝐵 ∖ (pmEven‘𝐷))) |
20 | 2, 19 | eleqtrd 2842 | . . . . . . 7 ⊢ ((𝐷 ∈ Fin ∧ 𝑋 ∈ (𝐵 ∖ 𝐴) ∧ 𝑌 ∈ (𝐵 ∖ 𝐴)) → 𝑋 ∈ (𝐵 ∖ (pmEven‘𝐷))) |
21 | 6, 7, 14 | psgnodpm 20774 | . . . . . . 7 ⊢ ((𝐷 ∈ Fin ∧ 𝑋 ∈ (𝐵 ∖ (pmEven‘𝐷))) → ((pmSgn‘𝐷)‘𝑋) = -1) |
22 | 1, 20, 21 | syl2anc 583 | . . . . . 6 ⊢ ((𝐷 ∈ Fin ∧ 𝑋 ∈ (𝐵 ∖ 𝐴) ∧ 𝑌 ∈ (𝐵 ∖ 𝐴)) → ((pmSgn‘𝐷)‘𝑋) = -1) |
23 | 4, 19 | eleqtrd 2842 | . . . . . . 7 ⊢ ((𝐷 ∈ Fin ∧ 𝑋 ∈ (𝐵 ∖ 𝐴) ∧ 𝑌 ∈ (𝐵 ∖ 𝐴)) → 𝑌 ∈ (𝐵 ∖ (pmEven‘𝐷))) |
24 | 6, 7, 14 | psgnodpm 20774 | . . . . . . 7 ⊢ ((𝐷 ∈ Fin ∧ 𝑌 ∈ (𝐵 ∖ (pmEven‘𝐷))) → ((pmSgn‘𝐷)‘𝑌) = -1) |
25 | 1, 23, 24 | syl2anc 583 | . . . . . 6 ⊢ ((𝐷 ∈ Fin ∧ 𝑋 ∈ (𝐵 ∖ 𝐴) ∧ 𝑌 ∈ (𝐵 ∖ 𝐴)) → ((pmSgn‘𝐷)‘𝑌) = -1) |
26 | 22, 25 | oveq12d 7286 | . . . . 5 ⊢ ((𝐷 ∈ Fin ∧ 𝑋 ∈ (𝐵 ∖ 𝐴) ∧ 𝑌 ∈ (𝐵 ∖ 𝐴)) → (((pmSgn‘𝐷)‘𝑋) · ((pmSgn‘𝐷)‘𝑌)) = (-1 · -1)) |
27 | neg1mulneg1e1 12169 | . . . . 5 ⊢ (-1 · -1) = 1 | |
28 | 26, 27 | eqtrdi 2795 | . . . 4 ⊢ ((𝐷 ∈ Fin ∧ 𝑋 ∈ (𝐵 ∖ 𝐴) ∧ 𝑌 ∈ (𝐵 ∖ 𝐴)) → (((pmSgn‘𝐷)‘𝑋) · ((pmSgn‘𝐷)‘𝑌)) = 1) |
29 | 16, 28 | eqtrd 2779 | . . 3 ⊢ ((𝐷 ∈ Fin ∧ 𝑋 ∈ (𝐵 ∖ 𝐴) ∧ 𝑌 ∈ (𝐵 ∖ 𝐴)) → ((pmSgn‘𝐷)‘(𝑋 ∘ 𝑌)) = 1) |
30 | 6, 7, 14 | psgnevpmb 20773 | . . . 4 ⊢ (𝐷 ∈ Fin → ((𝑋 ∘ 𝑌) ∈ (pmEven‘𝐷) ↔ ((𝑋 ∘ 𝑌) ∈ 𝐵 ∧ ((pmSgn‘𝐷)‘(𝑋 ∘ 𝑌)) = 1))) |
31 | 30 | biimpar 477 | . . 3 ⊢ ((𝐷 ∈ Fin ∧ ((𝑋 ∘ 𝑌) ∈ 𝐵 ∧ ((pmSgn‘𝐷)‘(𝑋 ∘ 𝑌)) = 1)) → (𝑋 ∘ 𝑌) ∈ (pmEven‘𝐷)) |
32 | 1, 13, 29, 31 | syl12anc 833 | . 2 ⊢ ((𝐷 ∈ Fin ∧ 𝑋 ∈ (𝐵 ∖ 𝐴) ∧ 𝑌 ∈ (𝐵 ∖ 𝐴)) → (𝑋 ∘ 𝑌) ∈ (pmEven‘𝐷)) |
33 | 32, 17 | eleqtrrdi 2851 | 1 ⊢ ((𝐷 ∈ Fin ∧ 𝑋 ∈ (𝐵 ∖ 𝐴) ∧ 𝑌 ∈ (𝐵 ∖ 𝐴)) → (𝑋 ∘ 𝑌) ∈ 𝐴) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 395 ∧ w3a 1085 = wceq 1541 ∈ wcel 2109 ∖ cdif 3888 ∘ ccom 5592 ‘cfv 6430 (class class class)co 7268 Fincfn 8707 1c1 10856 · cmul 10860 -cneg 11189 Basecbs 16893 +gcplusg 16943 SymGrpcsymg 18955 pmSgncpsgn 19078 pmEvencevpm 19079 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1801 ax-4 1815 ax-5 1916 ax-6 1974 ax-7 2014 ax-8 2111 ax-9 2119 ax-10 2140 ax-11 2157 ax-12 2174 ax-ext 2710 ax-rep 5213 ax-sep 5226 ax-nul 5233 ax-pow 5291 ax-pr 5355 ax-un 7579 ax-cnex 10911 ax-resscn 10912 ax-1cn 10913 ax-icn 10914 ax-addcl 10915 ax-addrcl 10916 ax-mulcl 10917 ax-mulrcl 10918 ax-mulcom 10919 ax-addass 10920 ax-mulass 10921 ax-distr 10922 ax-i2m1 10923 ax-1ne0 10924 ax-1rid 10925 ax-rnegex 10926 ax-rrecex 10927 ax-cnre 10928 ax-pre-lttri 10929 ax-pre-lttrn 10930 ax-pre-ltadd 10931 ax-pre-mulgt0 10932 ax-addf 10934 ax-mulf 10935 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-xor 1506 df-tru 1544 df-fal 1554 df-ex 1786 df-nf 1790 df-sb 2071 df-mo 2541 df-eu 2570 df-clab 2717 df-cleq 2731 df-clel 2817 df-nfc 2890 df-ne 2945 df-nel 3051 df-ral 3070 df-rex 3071 df-reu 3072 df-rmo 3073 df-rab 3074 df-v 3432 df-sbc 3720 df-csb 3837 df-dif 3894 df-un 3896 df-in 3898 df-ss 3908 df-pss 3910 df-nul 4262 df-if 4465 df-pw 4540 df-sn 4567 df-pr 4569 df-tp 4571 df-op 4573 df-ot 4575 df-uni 4845 df-int 4885 df-iun 4931 df-iin 4932 df-br 5079 df-opab 5141 df-mpt 5162 df-tr 5196 df-id 5488 df-eprel 5494 df-po 5502 df-so 5503 df-fr 5543 df-se 5544 df-we 5545 df-xp 5594 df-rel 5595 df-cnv 5596 df-co 5597 df-dm 5598 df-rn 5599 df-res 5600 df-ima 5601 df-pred 6199 df-ord 6266 df-on 6267 df-lim 6268 df-suc 6269 df-iota 6388 df-fun 6432 df-fn 6433 df-f 6434 df-f1 6435 df-fo 6436 df-f1o 6437 df-fv 6438 df-isom 6439 df-riota 7225 df-ov 7271 df-oprab 7272 df-mpo 7273 df-om 7701 df-1st 7817 df-2nd 7818 df-tpos 8026 df-frecs 8081 df-wrecs 8112 df-recs 8186 df-rdg 8225 df-1o 8281 df-2o 8282 df-er 8472 df-map 8591 df-en 8708 df-dom 8709 df-sdom 8710 df-fin 8711 df-card 9681 df-pnf 10995 df-mnf 10996 df-xr 10997 df-ltxr 10998 df-le 10999 df-sub 11190 df-neg 11191 df-div 11616 df-nn 11957 df-2 12019 df-3 12020 df-4 12021 df-5 12022 df-6 12023 df-7 12024 df-8 12025 df-9 12026 df-n0 12217 df-xnn0 12289 df-z 12303 df-dec 12420 df-uz 12565 df-rp 12713 df-fz 13222 df-fzo 13365 df-seq 13703 df-exp 13764 df-hash 14026 df-word 14199 df-lsw 14247 df-concat 14255 df-s1 14282 df-substr 14335 df-pfx 14365 df-splice 14444 df-reverse 14453 df-s2 14542 df-struct 16829 df-sets 16846 df-slot 16864 df-ndx 16876 df-base 16894 df-ress 16923 df-plusg 16956 df-mulr 16957 df-starv 16958 df-tset 16962 df-ple 16963 df-ds 16965 df-unif 16966 df-0g 17133 df-gsum 17134 df-mre 17276 df-mrc 17277 df-acs 17279 df-mgm 18307 df-sgrp 18356 df-mnd 18367 df-mhm 18411 df-submnd 18412 df-efmnd 18489 df-grp 18561 df-minusg 18562 df-subg 18733 df-ghm 18813 df-gim 18856 df-oppg 18931 df-symg 18956 df-pmtr 19031 df-psgn 19080 df-evpm 19081 df-cmn 19369 df-abl 19370 df-mgp 19702 df-ur 19719 df-ring 19766 df-cring 19767 df-oppr 19843 df-dvdsr 19864 df-unit 19865 df-invr 19895 df-dvr 19906 df-drng 19974 df-cnfld 20579 |
This theorem is referenced by: cyc3conja 31403 |
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