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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 1847 elrab3t 2972 eldifvsn 3826 bnd2 4286 opbrop 4829 opelresi 5049 funcnv3 5418 fnssresb 5470 dff1o5 5623 fneqeql2 5787 fnniniseg2 5801 dffo3 5824 fmptco 5843 fnressn 5870 fconst4m 5904 riota2df 6025 eloprabga 6140 suppimacnvfn 6446 mptsuppd 6456 suppssrst 6461 suppssrgst 6462 frecabcl 6630 mptelixpg 6969 exmidfodomrlemreseldju 7503 enq0breq 7751 genpassl 7839 genpassu 7840 elnnnn0 9539 peano2z 9613 znnsub 9629 znn0sub 9643 uzin 9887 nn01to3 9949 rpnegap 10019 negelrp 10020 xsubge0 10214 divelunit 10335 elfz5 10351 uzsplit 10426 elfzonelfzo 10575 infssuzex 10593 adddivflid 10652 divfl0 10656 hashfibclem 11206 swrdspsleq 11359 2shfti 11516 rexuz3 11675 clim2c 11969 fisumss 12078 bitsmod 12642 bitscmp 12644 bezoutlemmain 12694 nninfctlemfo 12736 dvdsfi 12936 pc2dvds 13028 1arith 13065 xpsfrnel 13557 xpsfrnel2 13559 ghmeqker 13988 lsslss 14529 zndvds 14797 znleval2 14802 eltg3 14922 lmbrf 15080 cnrest2 15101 cnptoprest 15104 cnptoprest2 15105 ismet2 15219 elbl2ps 15257 elbl2 15258 xblpnfps 15263 xblpnf 15264 bdxmet 15366 metcn 15379 cnbl0 15399 cnblcld 15400 mulc1cncf 15454 ellimc3apf 15525 pilem1 15644 wilthlem1 15848 lgsdilem 15900 lgsne0 15911 lgsabs1 15912 lgsquadlem1 15950 lgsquadlem2 15951 isclwwlknx 16411 clwwlkn1 16413 |
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