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Mirrors > Home > MPE Home > Th. List > necon3i | Unicode version |
Description: Contrapositive inference for inequality. (Contributed by NM, 9-Aug-2006.) (Proof shortened by Wolf Lammen, 22-Nov-2019.) |
Ref | Expression |
---|---|
necon3i.1 |
Ref | Expression |
---|---|
necon3i |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | necon3i.1 | . . 3 | |
2 | 1 | necon3ai 2685 | . 2 |
3 | 2 | neqned 2660 | 1 |
Colors of variables: wff setvar class |
Syntax hints: -> wi 4 = wceq 1395
=/= wne 2652 |
This theorem is referenced by: xpnz 5431 unixp 5545 inf3lem2 8067 infeq5 8075 cantnflem1 8129 cantnflem1OLD 8152 iunfictbso 8516 rankcf 9176 hashfun 12495 hashge3el3dif 12524 s1nz 12618 abssubne0 13149 expnprm 14421 grpn0 16082 pmtr3ncomlem2 16499 gsumval3OLD 16908 pgpfaclem2 17133 isdrng2 17406 mpfrcl 18187 ply1frcl 18355 gzrngunit 18483 zringunit 18520 zrngunit 18521 prmirredlem 18523 prmirredlemOLD 18526 uvcf1 18823 lindfrn 18856 dfac14lem 20118 flimclslem 20485 lebnumlem3 21463 pmltpclem2 21861 i1fmullem 22101 fta1glem1 22566 fta1blem 22569 dgrcolem1 22670 plydivlem4 22692 plyrem 22701 facth 22702 fta1lem 22703 vieta1lem1 22706 vieta1lem2 22707 vieta1 22708 aalioulem2 22729 geolim3 22735 logcj 22991 argregt0 22995 argimgt0 22997 argimlt0 22998 logneg2 23000 tanarg 23004 logtayl 23041 cxpsqrt 23084 cxpcn3lem 23121 cxpcn3 23122 dcubic2 23175 dcubic 23177 cubic 23180 asinlem 23199 atandmcj 23240 atancj 23241 atanlogsublem 23246 bndatandm 23260 birthdaylem1 23281 basellem4 23357 basellem5 23358 dchrn0 23525 lgsne0 23608 constr3lem2 24646 nmlno0lem 25708 nmlnop0iALT 26914 difneqnul 27415 cntnevol 28199 signsvtn0 28527 signstfveq0a 28533 signstfveq0 28534 nepss 29095 elima4 29209 heicant 30049 totbndbnd 30285 compne 31349 stoweidlem39 31821 cdleme3c 35955 cdleme7e 35972 imadisjlnd 37973 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 |
This theorem depends on definitions: df-bi 185 df-ne 2654 |
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