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| Mirrors > Home > MPE Home > Th. List > con2bid | Structured version Visualization version GIF version | ||
| Description: A contraposition deduction. (Contributed by NM, 15-Apr-1995.) |
| Ref | Expression |
|---|---|
| con2bid.1 | ⊢ (𝜑 → (𝜓 ↔ ¬ 𝜒)) |
| Ref | Expression |
|---|---|
| con2bid | ⊢ (𝜑 → (𝜒 ↔ ¬ 𝜓)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | con2bid.1 | . 2 ⊢ (𝜑 → (𝜓 ↔ ¬ 𝜒)) | |
| 2 | con2bi 356 | . 2 ⊢ ((𝜒 ↔ ¬ 𝜓) ↔ (𝜓 ↔ ¬ 𝜒)) | |
| 3 | 1, 2 | sylibr 237 | 1 ⊢ (𝜑 → (𝜒 ↔ ¬ 𝜓)) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 209 |
| 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 210 |
| This theorem is referenced by: con1bid 358 sotric 5599 sotrieq 5600 sotr2 5603 isso2i 5606 sotr3 5610 sotri2 6129 sotri3 6130 somin1 6133 somincom 6134 ordtri2 6396 ordtr3 6407 ordintdif 6412 ord0eln0 6417 soisoi 7326 weniso 7352 ordunisuc2 7836 limsssuc 7842 nlimon 7843 tfrlem15 8375 oawordeulem 8535 nnawordex 8619 fimaxg 9243 suplub2 9417 fiming 9456 wemapsolem 9508 cantnflem1 9654 rankval3b 9794 cardsdomel 9956 harsdom 9977 isfin1-2 10364 fin1a2lem7 10385 suplem2pr 11033 xrltnle 11271 ltnle 11284 leloe 11291 xrlttri 13159 xrleloe 13164 xrrebnd 13189 supxrbnd2 13343 supxrbnd 13349 om2uzf1oi 13985 rabssnn0fi 14018 sgnneg 15133 cnpart 15287 bits0e 16482 bitsmod 16489 bitsinv1lem 16494 sadcaddlem 16510 trfil2 24044 xrsxmet 24967 metdsge 25007 ovolunlem1a 25655 ovolunlem1 25656 itg2seq 25901 noetasuplem4 27900 noetainflem4 27904 ltnles 27917 lesloe 27918 toslublem 33292 tosglblem 33294 isarchi2 33505 gsumesum 34449 elfuns 36405 naddle 36696 finminlem 36829 bj-bibibi 37179 itg2addnclem 38322 heiborlem10 38471 aks4d1p8 42854 cantnfresb 44051 naddwordnexlem4 44128 ontric3g 44248 or3or 44749 ntrclselnel2 44784 clsneifv3 44836 islininds2 49264 resinsnlem 49649 |
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