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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 445 3anibar 1196 3biant1d 1396 drex1 1851 elrab3t 2981 eldifvsn 3842 bnd2 4305 opbrop 4849 opelresi 5069 funcnv3 5438 fnssresb 5490 dff1o5 5643 fneqeql2 5809 fnniniseg2 5823 dffo3 5846 fmptco 5865 fnressn 5892 fconst4m 5926 riota2df 6050 eloprabga 6165 suppimacnvfn 6476 mptsuppd 6486 suppssrst 6491 suppssrgst 6492 frecabcl 6660 mptelixpg 7006 exmidfodomrlemreseldju 7542 enq0breq 7793 genpassl 7881 genpassu 7882 elnnnn0 9585 peano2z 9659 znnsub 9675 znn0sub 9689 uzin 9934 nn01to3 9996 rpnegap 10066 negelrp 10067 xsubge0 10262 divelunit 10383 elfz5 10399 uzsplit 10477 elfzonelfzo 10626 infssuzex 10644 adddivflid 10705 divfl0 10709 hashfibclem 11260 hashf1lem1 11263 swrdspsleq 11417 2shfti 11574 rexuz3 11734 clim2c 12028 fisumss 12137 bitsmod 12701 bitscmp 12703 bezoutlemmain 12753 nninfctlemfo 12795 dvdsfi 12995 pc2dvds 13087 1arith 13124 xpsfrnel 13642 xpsfrnel2 13644 ghmeqker 14051 lsslss 14690 zndvds 14956 znleval2 14961 eltg3 15081 lmbrf 15239 cnrest2 15260 cnptoprest 15263 cnptoprest2 15264 ismet2 15378 elbl2ps 15416 elbl2 15417 xblpnfps 15422 xblpnf 15423 bdxmet 15525 metcn 15538 cnbl0 15558 cnblcld 15559 mulc1cncf 15613 ellimc3apf 15684 pilem1 15803 wilthlem1 16008 lgsdilem 16060 lgsne0 16071 lgsabs1 16072 lgsquadlem1 16110 lgsquadlem2 16111 isclwwlknx 16571 clwwlkn1 16573 |
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