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Related theorems GIF version |
| Description: Elimination of a conjunct. Theorem *3.26 (Simp) of [WhiteheadRussell] p. 112. |
| Ref | Expression |
|---|---|
| pm3.26 | ⊢ ((φ ∧ ψ) → φ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-an 198 | . 2 ⊢ ((φ ∧ ψ) ↔ ¬ (φ → ¬ ψ)) | |
| 2 | pm3.26im 120 | . 2 ⊢ (¬ (φ → ¬ ψ) → φ) | |
| 3 | 1, 2 | sylbi 174 | 1 ⊢ ((φ ∧ ψ) → φ) |
| Colors of variables: wff set class |
| Syntax hints: ¬ wn 1 → wi 2 ∧ wa 196 |
| This theorem is referenced by: pm3.26i 257 pm3.26d 258 ancrb 265 pm4.45im 267 anim12i 268 adantrd 308 anidm 331 ancom 333 abai 366 anabs1 374 pm3.48 430 ibib 448 ordi 452 pm4.71 481 intnanr 517 biantrud 545 bianfd 554 dedlemb 570 19.26 749 19.40 773 sbequ2 864 mopick2 1057 moexex 1058 2exeu 1066 2eu2 1068 r19.40 1301 ssab 1555 class2set 1747 moabex 1868 mosubop 1911 iununi 2037 ordelord 2221 ordsseleq 2227 onin 2229 ordsson 2242 ralxp 2456 xpss 2465 opabssxp 2468 xp0r 2474 dmcosseq 2572 relssres 2596 dminss 2648 imainss 2649 cores 2659 fun11uni 2707 ffnfv 2892 isotr 2935 isotrALT 2936 isofrlem 2939 f1oiso 2942 tz7.48lem 2993 tz7.48-2 2995 fnoprab 3038 oaass 3163 omordi 3164 oen0 3165 nndi 3180 nnmord 3189 ecopoprtrn 3247 eceqopreq 3249 th3qlem1 3250 pw2en 3348 ssenen 3399 unblem1 3431 unblem2 3432 dfom3 3477 r1ord 3499 r1val1 3502 rankr1 3518 karden 3551 aceq3 3556 kmlem13 3592 kmlem16 3595 hta 3619 cardalephex 3691 axrepnd 3740 axunnd 3742 axacndlem1 3753 axacndlem3 3755 enqeceq 3841 distrpq 3861 ltexpq 3874 prn0 3887 prpssnq 3888 genpnnp 3902 addclprlem2 3913 distrlem4pr 3924 prlem936 3949 reclem3pr 3952 suplem2pr 3956 enreceq 3971 mulcmpblnr 3977 axrecex 4079 divdivdivt 4265 divdiv23t 4271 leltnet 4287 ltsubpost 4364 1nn 4432 nnind 4434 nnleltp1t 4448 nndiv 4453 nnreclt 4522 creur 4532 znnsubt 4595 qrecclt 4646 seqrn 4673 expaddt 4698 replimt 4798 ruclem28 4912 infdif 4948 infmap2lem1 4951 infmap2lem2 4952 gch-kn 4957 hvsubaddeqt 5019 hi2eqt 5059 shex 5115 shaddclt 5123 chocuni 5179 occllem6 5185 projlem26 5218 pjthu 5241 pjoml 5271 chabs1t 5432 spansncol 5473 h1datom 5483 osumlem7 5536 5oalem1 5544 5oalem2 5545 5oalem5 5548 3oalem2 5553 pjclem4 5653 pj3s 5659 stge0t 5673 cvpsst 5717 spansncv2t 5725 dmdbr2 5733 ssmd2 5735 atn0 5743 chcv1t 5751 atcv0eq 5767 atexch 5769 atcvat3 5774 atcvat4 5775 mdsymlem2 5777 mdsymlem3 5778 mdsymlem5 5780 |
| 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 |