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Mirrors > Home > MPE Home > Th. List > psgnodpmr | Structured version Visualization version GIF version |
Description: If a permutation has sign -1 it is odd (not even). (Contributed by SO, 9-Jul-2018.) |
Ref | Expression |
---|---|
evpmss.s | β’ π = (SymGrpβπ·) |
evpmss.p | β’ π = (Baseβπ) |
psgnevpmb.n | β’ π = (pmSgnβπ·) |
Ref | Expression |
---|---|
psgnodpmr | β’ ((π· β Fin β§ πΉ β π β§ (πβπΉ) = -1) β πΉ β (π β (pmEvenβπ·))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | simp2 1134 | . 2 β’ ((π· β Fin β§ πΉ β π β§ (πβπΉ) = -1) β πΉ β π) | |
2 | evpmss.s | . . . . . . . 8 β’ π = (SymGrpβπ·) | |
3 | evpmss.p | . . . . . . . 8 β’ π = (Baseβπ) | |
4 | psgnevpmb.n | . . . . . . . 8 β’ π = (pmSgnβπ·) | |
5 | 2, 3, 4 | psgnevpm 21482 | . . . . . . 7 β’ ((π· β Fin β§ πΉ β (pmEvenβπ·)) β (πβπΉ) = 1) |
6 | 5 | ex 412 | . . . . . 6 β’ (π· β Fin β (πΉ β (pmEvenβπ·) β (πβπΉ) = 1)) |
7 | 6 | adantr 480 | . . . . 5 β’ ((π· β Fin β§ πΉ β π) β (πΉ β (pmEvenβπ·) β (πβπΉ) = 1)) |
8 | neg1rr 12331 | . . . . . . 7 β’ -1 β β | |
9 | neg1lt0 12333 | . . . . . . . 8 β’ -1 < 0 | |
10 | 0lt1 11740 | . . . . . . . 8 β’ 0 < 1 | |
11 | 0re 11220 | . . . . . . . . 9 β’ 0 β β | |
12 | 1re 11218 | . . . . . . . . 9 β’ 1 β β | |
13 | 8, 11, 12 | lttri 11344 | . . . . . . . 8 β’ ((-1 < 0 β§ 0 < 1) β -1 < 1) |
14 | 9, 10, 13 | mp2an 689 | . . . . . . 7 β’ -1 < 1 |
15 | 8, 14 | gtneii 11330 | . . . . . 6 β’ 1 β -1 |
16 | neeq1 2997 | . . . . . 6 β’ ((πβπΉ) = 1 β ((πβπΉ) β -1 β 1 β -1)) | |
17 | 15, 16 | mpbiri 258 | . . . . 5 β’ ((πβπΉ) = 1 β (πβπΉ) β -1) |
18 | 7, 17 | syl6 35 | . . . 4 β’ ((π· β Fin β§ πΉ β π) β (πΉ β (pmEvenβπ·) β (πβπΉ) β -1)) |
19 | 18 | necon2bd 2950 | . . 3 β’ ((π· β Fin β§ πΉ β π) β ((πβπΉ) = -1 β Β¬ πΉ β (pmEvenβπ·))) |
20 | 19 | 3impia 1114 | . 2 β’ ((π· β Fin β§ πΉ β π β§ (πβπΉ) = -1) β Β¬ πΉ β (pmEvenβπ·)) |
21 | 1, 20 | eldifd 3954 | 1 β’ ((π· β Fin β§ πΉ β π β§ (πβπΉ) = -1) β πΉ β (π β (pmEvenβπ·))) |
Colors of variables: wff setvar class |
Syntax hints: Β¬ wn 3 β wi 4 β§ wa 395 β§ w3a 1084 = wceq 1533 β wcel 2098 β wne 2934 β cdif 3940 class class class wbr 5141 βcfv 6537 Fincfn 8941 0cc0 11112 1c1 11113 < clt 11252 -cneg 11449 Basecbs 17153 SymGrpcsymg 19286 pmSgncpsgn 19409 pmEvencevpm 19410 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1789 ax-4 1803 ax-5 1905 ax-6 1963 ax-7 2003 ax-8 2100 ax-9 2108 ax-10 2129 ax-11 2146 ax-12 2163 ax-ext 2697 ax-rep 5278 ax-sep 5292 ax-nul 5299 ax-pow 5356 ax-pr 5420 ax-un 7722 ax-cnex 11168 ax-resscn 11169 ax-1cn 11170 ax-icn 11171 ax-addcl 11172 ax-addrcl 11173 ax-mulcl 11174 ax-mulrcl 11175 ax-mulcom 11176 ax-addass 11177 ax-mulass 11178 ax-distr 11179 ax-i2m1 11180 ax-1ne0 11181 ax-1rid 11182 ax-rnegex 11183 ax-rrecex 11184 ax-cnre 11185 ax-pre-lttri 11186 ax-pre-lttrn 11187 ax-pre-ltadd 11188 ax-pre-mulgt0 11189 ax-addf 11191 ax-mulf 11192 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 845 df-3or 1085 df-3an 1086 df-xor 1505 df-tru 1536 df-fal 1546 df-ex 1774 df-nf 1778 df-sb 2060 df-mo 2528 df-eu 2557 df-clab 2704 df-cleq 2718 df-clel 2804 df-nfc 2879 df-ne 2935 df-nel 3041 df-ral 3056 df-rex 3065 df-rmo 3370 df-reu 3371 df-rab 3427 df-v 3470 df-sbc 3773 df-csb 3889 df-dif 3946 df-un 3948 df-in 3950 df-ss 3960 df-pss 3962 df-nul 4318 df-if 4524 df-pw 4599 df-sn 4624 df-pr 4626 df-tp 4628 df-op 4630 df-ot 4632 df-uni 4903 df-int 4944 df-iun 4992 df-iin 4993 df-br 5142 df-opab 5204 df-mpt 5225 df-tr 5259 df-id 5567 df-eprel 5573 df-po 5581 df-so 5582 df-fr 5624 df-se 5625 df-we 5626 df-xp 5675 df-rel 5676 df-cnv 5677 df-co 5678 df-dm 5679 df-rn 5680 df-res 5681 df-ima 5682 df-pred 6294 df-ord 6361 df-on 6362 df-lim 6363 df-suc 6364 df-iota 6489 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 df-fo 6543 df-f1o 6544 df-fv 6545 df-isom 6546 df-riota 7361 df-ov 7408 df-oprab 7409 df-mpo 7410 df-om 7853 df-1st 7974 df-2nd 7975 df-tpos 8212 df-frecs 8267 df-wrecs 8298 df-recs 8372 df-rdg 8411 df-1o 8467 df-2o 8468 df-er 8705 df-map 8824 df-en 8942 df-dom 8943 df-sdom 8944 df-fin 8945 df-card 9936 df-pnf 11254 df-mnf 11255 df-xr 11256 df-ltxr 11257 df-le 11258 df-sub 11450 df-neg 11451 df-div 11876 df-nn 12217 df-2 12279 df-3 12280 df-4 12281 df-5 12282 df-6 12283 df-7 12284 df-8 12285 df-9 12286 df-n0 12477 df-xnn0 12549 df-z 12563 df-dec 12682 df-uz 12827 df-rp 12981 df-fz 13491 df-fzo 13634 df-seq 13973 df-exp 14033 df-hash 14296 df-word 14471 df-lsw 14519 df-concat 14527 df-s1 14552 df-substr 14597 df-pfx 14627 df-splice 14706 df-reverse 14715 df-s2 14805 df-struct 17089 df-sets 17106 df-slot 17124 df-ndx 17136 df-base 17154 df-ress 17183 df-plusg 17219 df-mulr 17220 df-starv 17221 df-tset 17225 df-ple 17226 df-ds 17228 df-unif 17229 df-0g 17396 df-gsum 17397 df-mre 17539 df-mrc 17540 df-acs 17542 df-mgm 18573 df-sgrp 18652 df-mnd 18668 df-mhm 18713 df-submnd 18714 df-efmnd 18794 df-grp 18866 df-minusg 18867 df-subg 19050 df-ghm 19139 df-gim 19184 df-oppg 19262 df-symg 19287 df-pmtr 19362 df-psgn 19411 df-evpm 19412 df-cmn 19702 df-abl 19703 df-mgp 20040 df-rng 20058 df-ur 20087 df-ring 20140 df-cring 20141 df-oppr 20236 df-dvdsr 20259 df-unit 20260 df-invr 20290 df-dvr 20303 df-drng 20589 df-cnfld 21241 |
This theorem is referenced by: evpmodpmf1o 21489 pmtrodpm 21490 mdetralt 22465 |
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