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| Description: Elimination of a conjunct. Theorem *3.27 (Simp) of [WhiteheadRussell] p. 112. |
| Ref | Expression |
|---|---|
| pm3.27 | ⊢ ((φ ∧ ψ) → ψ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-an 198 | . 2 ⊢ ((φ ∧ ψ) ↔ ¬ (φ → ¬ ψ)) | |
| 2 | pm3.27im 121 | . 2 ⊢ (¬ (φ → ¬ ψ) → ψ) | |
| 3 | 1, 2 | sylbi 174 | 1 ⊢ ((φ ∧ ψ) → ψ) |
| Colors of variables: wff set class |
| Syntax hints: ¬ wn 1 → wi 2 ∧ wa 196 |
| This theorem is referenced by: pm3.27i 261 pm3.27d 262 anclb 264 pm3.4 266 anim12i 268 ancom 333 imdistan 339 anabs7 376 pm3.48 430 oel 441 ordi 452 pm4.71 481 msca 508 intnan 516 bianfi 553 pclem6 555 niabn 566 dedlem0b 568 19.26 749 19.40 773 moan 1046 rexex 1242 r19.40 1301 rabab 1359 difrab 1695 exss 1881 reuuni1 1955 ordelord 2221 onpwsuc 2315 dfom2 2374 imassrn 2611 fun11uni 2707 tz6.12-2 2845 f1fv 2916 isofrlem 2939 tfrlem5 2953 tz7.49 2997 oalim 3135 omlim 3136 oelim 3137 oaordex 3160 oalimcl 3162 oaass 3163 nnmordi 3188 nnaordex 3191 nnawordex 3192 omsmo 3196 ecopoprtrn 3247 eceqopreq 3249 pw2en 3348 sbthlem9 3357 sdomdomtr 3370 onomeneq 3414 aceq4 3557 aceq5lem4 3561 aceq5lem5 3562 aceq6b 3565 ac6s2 3578 kmlem2 3581 kmlem4 3583 axrepndlem2 3739 axunnd 3742 axacndlem2 3754 axacndlem4 3756 axacnd 3758 mulcanpi 3821 indpi 3828 distrpqlem 3860 ltapq 3870 ltexpq 3874 ltexpq2 3875 ltbtwnpq 3878 genpnnp 3902 prlem934 3933 mulcmpblnr 3977 mulgt0sr 4008 suppsr2 4017 axsup 4088 divmuldivt 4263 divadddivt 4264 divdiv23t 4271 ltsubpost 4364 creui 4533 elnnz1 4581 elnn0nn 4593 znnsubt 4595 uzind 4603 qrecclt 4646 nn0opth 4724 xpnnen 4927 infxpidmlem8 4940 infxpidmlem12 4944 infmap2lem2 4952 hvsubcan1t 5016 hvsubaddeqt 5019 hi2eqt 5059 normgt0t 5078 shmulclt 5124 ocorth 5172 chocuni 5179 projlem22 5214 projlem26 5218 pjthu2 5242 pjopt 5264 pjpot 5265 pjoml 5271 spansncol 5473 osumlem2 5531 osumlem6 5535 spansncv 5542 5oalem1 5544 5oalem2 5545 5oalem5 5548 3oalem2 5553 stle1t 5674 strlem3a 5693 mdbr2 5728 dmdbr2 5733 atom1d 5750 chrelat2 5758 cvp 5764 atcvatlem 5770 atcvat3 5774 atcvat4 5775 mdsymlem5 5780 sumdmdi 5785 |
| 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 |