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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 |
| This proof depends on syntax axioms: → wi 4 ∧ wa 104 ↔ wb 105 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia2 107 ax-ia3 108 |
| This proof depends on definitions: df-bi 117 |
| This theorem is used by: mpbirand 445 3anibar 1196 3biant1d 1396 drex1 1851 elrab3t 2981 eldifvsn 3847 bnd2 4310 opbrop 4854 opelresi 5074 funcnv3 5443 fnssresb 5495 dff1o5 5648 fneqeql2 5818 fnniniseg2 5832 dffo3 5855 fmptco 5874 fnressn 5901 fconst4m 5935 riota2df 6060 eloprabga 6175 suppimacnvfn 6486 mptsuppd 6496 suppssrst 6501 suppssrgst 6502 frecabcl 6670 mptelixpg 7016 exmidfodomrlemreseldju 7552 enq0breq 7803 genpassl 7891 genpassu 7892 elnnnn0 9610 peano2z 9684 znnsub 9700 znn0sub 9714 uzin 9964 nn01to3 10026 rpnegap 10097 negelrp 10098 xsubge0 10293 divelunit 10414 elfz5 10430 uzsplit 10509 elfzonelfzo 10658 infssuzex 10676 adddivflid 10740 divfl0 10744 hashfibclem 11296 hashf1lem1 11299 swrdspsleq 11453 2shfti 11610 rexuz3 11770 clim2c 12066 fisumss 12175 bitsmod 12739 bitscmp 12741 bezoutlemmain 12791 nninfctlemfo 12833 dvdsfi 13037 pc2dvds 13129 1arith 13166 xpsfrnel 13714 xpsfrnel2 13716 ghmeqker 14123 lsslss 14767 zndvds 15033 znleval2 15038 eltg3 15207 lmbrf 15365 cnrest2 15386 cnptoprest 15389 cnptoprest2 15390 ismet2 15504 elbl2ps 15542 elbl2 15543 xblpnfps 15548 xblpnf 15549 bdxmet 15651 metcn 15664 cnbl0 15684 cnblcld 15685 mulc1cncf 15739 ellimc3apf 15810 pilem1 15930 wilthlem1 16151 bposlem1 16209 lgsdilem 16244 lgsne0 16255 lgsabs1 16256 lgsquadlem1 16294 lgsquadlem2 16295 isclwwlknx 16755 clwwlkn1 16757 |
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