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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 236 | 1 ⊢ (𝜑 → (𝜒 ↔ ¬ 𝜓)) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ↔ wb 208 |
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 209 |
This theorem is referenced by: con1bid 358 sotric 5495 sotrieq 5496 sotr2 5499 isso2i 5502 sotri2 5983 sotri3 5984 somin1 5987 somincom 5988 ordtri2 6220 ordtr3 6230 ordintdif 6234 ord0eln0 6239 soisoi 7075 weniso 7101 ordunisuc2 7553 limsssuc 7559 nlimon 7560 tfrlem15 8022 oawordeulem 8174 nnawordex 8257 onomeneq 8702 fimaxg 8759 suplub2 8919 fiming 8956 wemapsolem 9008 cantnflem1 9146 rankval3b 9249 cardsdomel 9397 harsdom 9418 isfin1-2 9801 fin1a2lem7 9822 suplem2pr 10469 xrltnle 10702 ltnle 10714 leloe 10721 xrlttri 12526 xrleloe 12531 xrrebnd 12555 supxrbnd2 12709 supxrbnd 12715 om2uzf1oi 13315 rabssnn0fi 13348 cnpart 14593 bits0e 15772 bitsmod 15779 bitsinv1lem 15784 sadcaddlem 15800 trfil2 22489 xrsxmet 23411 metdsge 23451 ovolunlem1a 24091 ovolunlem1 24092 itg2seq 24337 toslublem 30649 tosglblem 30651 isarchi2 30809 gsumesum 31313 sgnneg 31793 sotr3 32997 noetalem3 33214 sltnle 33227 sleloe 33228 elfuns 33371 finminlem 33661 bj-bibibi 33915 itg2addnclem 34937 heiborlem10 35092 ontric3g 39881 or3or 40364 ntrclselnel2 40401 clsneifv3 40453 islininds2 44533 |
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