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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 1191 3biant1d 1391 drex1 1846 elrab3t 2961 bnd2 4263 opbrop 4805 opelresi 5024 funcnv3 5392 fnssresb 5444 dff1o5 5592 fneqeql2 5756 fnniniseg2 5770 rexsupp 5771 dffo3 5794 fmptco 5813 fnressn 5840 fconst4m 5874 riota2df 5993 eloprabga 6108 frecabcl 6565 mptelixpg 6903 exmidfodomrlemreseldju 7411 enq0breq 7656 genpassl 7744 genpassu 7745 elnnnn0 9445 peano2z 9515 znnsub 9531 znn0sub 9545 uzin 9789 nn01to3 9851 rpnegap 9921 negelrp 9922 xsubge0 10116 divelunit 10237 elfz5 10252 uzsplit 10327 elfzonelfzo 10476 infssuzex 10494 adddivflid 10553 divfl0 10557 swrdspsleq 11252 2shfti 11409 rexuz3 11568 clim2c 11862 fisumss 11971 bitsmod 12535 bitscmp 12537 bezoutlemmain 12587 nninfctlemfo 12629 dvdsfi 12829 pc2dvds 12921 1arith 12958 xpsfrnel 13445 xpsfrnel2 13447 ghmeqker 13876 lsslss 14414 zndvds 14682 znleval2 14687 eltg3 14800 lmbrf 14958 cnrest2 14979 cnptoprest 14982 cnptoprest2 14983 ismet2 15097 elbl2ps 15135 elbl2 15136 xblpnfps 15141 xblpnf 15142 bdxmet 15244 metcn 15257 cnbl0 15277 cnblcld 15278 mulc1cncf 15332 ellimc3apf 15403 pilem1 15522 wilthlem1 15723 lgsdilem 15775 lgsne0 15786 lgsabs1 15787 lgsquadlem1 15825 lgsquadlem2 15826 isclwwlknx 16286 clwwlkn1 16288 |
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