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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 1189 3biant1d 1389 drex1 1844 elrab3t 2958 bnd2 4257 opbrop 4798 opelresi 5016 funcnv3 5383 fnssresb 5435 dff1o5 5583 fneqeql2 5746 fnniniseg2 5760 rexsupp 5761 dffo3 5784 fmptco 5803 fnressn 5829 fconst4m 5863 riota2df 5982 eloprabga 6097 frecabcl 6551 mptelixpg 6889 exmidfodomrlemreseldju 7389 enq0breq 7634 genpassl 7722 genpassu 7723 elnnnn0 9423 peano2z 9493 znnsub 9509 znn0sub 9523 uzin 9767 nn01to3 9824 rpnegap 9894 negelrp 9895 xsubge0 10089 divelunit 10210 elfz5 10225 uzsplit 10300 elfzonelfzo 10448 infssuzex 10465 adddivflid 10524 divfl0 10528 swrdspsleq 11214 2shfti 11357 rexuz3 11516 clim2c 11810 fisumss 11918 bitsmod 12482 bitscmp 12484 bezoutlemmain 12534 nninfctlemfo 12576 dvdsfi 12776 pc2dvds 12868 1arith 12905 xpsfrnel 13392 xpsfrnel2 13394 ghmeqker 13823 lsslss 14360 zndvds 14628 znleval2 14633 eltg3 14746 lmbrf 14904 cnrest2 14925 cnptoprest 14928 cnptoprest2 14929 ismet2 15043 elbl2ps 15081 elbl2 15082 xblpnfps 15087 xblpnf 15088 bdxmet 15190 metcn 15203 cnbl0 15223 cnblcld 15224 mulc1cncf 15278 ellimc3apf 15349 pilem1 15468 wilthlem1 15669 lgsdilem 15721 lgsne0 15732 lgsabs1 15733 lgsquadlem1 15771 lgsquadlem2 15772 |
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