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Related theorems GIF version |
| Description: Deduction negating both sides of a logical equivalence. |
| Ref | Expression |
|---|---|
| bid.1 | ⊢ (φ → (ψ ↔ χ)) |
| Ref | Expression |
|---|---|
| negbid | ⊢ (φ → (¬ ψ ↔ ¬ χ)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | bid.1 | . 2 ⊢ (φ → (ψ ↔ χ)) | |
| 2 | pm4.11 400 | . 2 ⊢ ((ψ ↔ χ) ↔ (¬ ψ ↔ ¬ χ)) | |
| 3 | 1, 2 | sylib 173 | 1 ⊢ (φ → (¬ ψ ↔ ¬ χ)) |
| Colors of variables: wff set class |
| Syntax hints: ¬ wn 1 → wi 2 ↔ wb 127 |
| This theorem is referenced by: imbi1d 465 con3th 573 eqsex 834 cbvex 849 cbvexd 978 neeq1 1194 neeq2 1195 neleq1 1199 neleq2 1200 gencbval 1373 cla4egf 1395 cla42gv 1399 cla4ev 1401 ru 1437 sbcn 1459 nalset 1482 eldif 1496 difeq2 1583 prel12 1875 nnullss 1880 dtru 1889 opprc1b 1906 poeq1 2130 pocl 2132 sotric 2148 sotrieq 2149 so 2152 supmo 2156 supub 2160 suplub 2161 supsn 2168 fri 2170 dffr2 2171 frc 2172 freq1 2174 fr2nr 2177 fr3nr 2178 efrirr 2180 tz7.2 2183 wereu 2197 limeq 2211 nordeq 2218 ordtri1 2231 ordtri3 2234 ordsucsssuc 2325 orduninsuc 2365 dfom2 2374 omssnlim 2386 ssnlim 2407 vtoclibr 2451 weinxp 2467 tz6.12i 2847 fvco 2865 cbvexfo 2924 isofrlem 2939 f1oweOLD 2944 canth 2945 tfrlem10 2958 tz7.44-2 2967 rdglem2 2976 tz7.48lem 2993 tz7.49 2997 abianfp 3000 ndmoprg 3057 oacan 3150 2dom 3332 php 3409 nndomo 3416 nnsdomo 3417 omsdomnn 3424 unfilem1 3438 fiint 3445 zfregcl 3446 eirrv 3449 eirr 3450 en2lp 3453 inf3lem2 3465 rankr1g 3519 cplem2 3546 aceq3lem 3555 aceq5lem3 3560 aceq5lem4 3561 aceq5 3563 aceq6b 3565 ac6lem 3575 kmlem1 3580 kmlem2 3581 kmlem4 3583 kmlem11 3590 kmlem14 3593 numthlem 3598 zornlem6 3608 zorn 3611 fodomb 3615 hta 3619 cardsdom 3643 domtri 3644 alephord3 3683 axpowndlem2 3744 axpowndlem3 3745 axpowndlem4 3746 axregnd 3750 ltsopi 3810 addnidpi 3822 ltsopq 3869 genpnnp 3902 ltexprlem7 3942 addcanpr 3946 prlem936 3949 reclem1pr 3950 reclem3pr 3952 suppr 3957 ltsosr 3997 suppsr 4016 supsrlem6 4024 supre 4054 ltsor 4055 muln0bt 4213 divneq0bt 4230 leltt 4278 ltsqt 4376 ledivt 4405 le2sq 4415 lt0nnn0 4549 indstr 4611 sqrlem18 4748 sqrlem21 4751 sqrlem22 4752 sqr2irrlem3 4779 absgt0t 4863 ruclem29 4913 ruclem35 4919 ruclem37 4921 ruclem39 4923 infxpidmlem10 4942 infxpidmlem11 4943 shintclt 5295 chintclt 5297 ch0psst 5370 chpsscon3t 5420 chnlet 5431 chne0t 5452 elspansn2t 5472 pjnelt 5667 str 5698 cvbrt 5714 cvcon3t 5716 chcv1t 5751 cvexchlem 5759 chrelat2t 5761 atnem0 5766 atcvat2 5772 |
| This theorem was proved from axioms: ax-1 3 ax-2 4 ax-3 5 ax-mp 6 |
| This theorem depends on definitions: df-bi 128 df-an 198 |