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| Mirrors > Home > ILE Home > Th. List > biantrurd | GIF version | ||
| Description: A wff is equivalent to its conjunction with truth. (Contributed by NM, 1-May-1995.) (Proof shortened by Andrew Salmon, 7-May-2011.) |
| Ref | Expression |
|---|---|
| biantrud.1 | ⊢ (𝜑 → 𝜓) |
| Ref | Expression |
|---|---|
| biantrurd | ⊢ (𝜑 → (𝜒 ↔ (𝜓 ∧ 𝜒))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | biantrud.1 | . 2 ⊢ (𝜑 → 𝜓) | |
| 2 | ibar 301 | . 2 ⊢ (𝜓 → (𝜒 ↔ (𝜓 ∧ 𝜒))) | |
| 3 | 1, 2 | syl 14 | 1 ⊢ (𝜑 → (𝜒 ↔ (𝜓 ∧ 𝜒))) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ↔ wb 105 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia2 107 ax-ia3 108 |
| This theorem depends on definitions: df-bi 117 |
| This theorem is referenced by: mpbirand 441 3anibar 1192 3biant1d 1392 drex1 1846 elrab3t 2962 eldifvsn 3810 bnd2 4269 opbrop 4811 opelresi 5030 funcnv3 5399 fnssresb 5451 dff1o5 5601 fneqeql2 5765 fnniniseg2 5779 dffo3 5802 fmptco 5821 fnressn 5848 fconst4m 5882 riota2df 6003 eloprabga 6118 suppimacnvfn 6424 mptsuppd 6434 suppssrst 6439 suppssrgst 6440 frecabcl 6608 mptelixpg 6946 exmidfodomrlemreseldju 7454 enq0breq 7699 genpassl 7787 genpassu 7788 elnnnn0 9487 peano2z 9559 znnsub 9575 znn0sub 9589 uzin 9833 nn01to3 9895 rpnegap 9965 negelrp 9966 xsubge0 10160 divelunit 10281 elfz5 10297 uzsplit 10372 elfzonelfzo 10521 infssuzex 10539 adddivflid 10598 divfl0 10602 swrdspsleq 11297 2shfti 11454 rexuz3 11613 clim2c 11907 fisumss 12016 bitsmod 12580 bitscmp 12582 bezoutlemmain 12632 nninfctlemfo 12674 dvdsfi 12874 pc2dvds 12966 1arith 13003 xpsfrnel 13490 xpsfrnel2 13492 ghmeqker 13921 lsslss 14460 zndvds 14728 znleval2 14733 eltg3 14851 lmbrf 15009 cnrest2 15030 cnptoprest 15033 cnptoprest2 15034 ismet2 15148 elbl2ps 15186 elbl2 15187 xblpnfps 15192 xblpnf 15193 bdxmet 15295 metcn 15308 cnbl0 15328 cnblcld 15329 mulc1cncf 15383 ellimc3apf 15454 pilem1 15573 wilthlem1 15777 lgsdilem 15829 lgsne0 15840 lgsabs1 15841 lgsquadlem1 15879 lgsquadlem2 15880 isclwwlknx 16340 clwwlkn1 16342 |
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