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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 2959 bnd2 4261 opbrop 4803 opelresi 5022 funcnv3 5389 fnssresb 5441 dff1o5 5589 fneqeql2 5752 fnniniseg2 5766 rexsupp 5767 dffo3 5790 fmptco 5809 fnressn 5835 fconst4m 5869 riota2df 5988 eloprabga 6103 frecabcl 6560 mptelixpg 6898 exmidfodomrlemreseldju 7401 enq0breq 7646 genpassl 7734 genpassu 7735 elnnnn0 9435 peano2z 9505 znnsub 9521 znn0sub 9535 uzin 9779 nn01to3 9841 rpnegap 9911 negelrp 9912 xsubge0 10106 divelunit 10227 elfz5 10242 uzsplit 10317 elfzonelfzo 10465 infssuzex 10483 adddivflid 10542 divfl0 10546 swrdspsleq 11238 2shfti 11382 rexuz3 11541 clim2c 11835 fisumss 11943 bitsmod 12507 bitscmp 12509 bezoutlemmain 12559 nninfctlemfo 12601 dvdsfi 12801 pc2dvds 12893 1arith 12930 xpsfrnel 13417 xpsfrnel2 13419 ghmeqker 13848 lsslss 14385 zndvds 14653 znleval2 14658 eltg3 14771 lmbrf 14929 cnrest2 14950 cnptoprest 14953 cnptoprest2 14954 ismet2 15068 elbl2ps 15106 elbl2 15107 xblpnfps 15112 xblpnf 15113 bdxmet 15215 metcn 15228 cnbl0 15248 cnblcld 15249 mulc1cncf 15303 ellimc3apf 15374 pilem1 15493 wilthlem1 15694 lgsdilem 15746 lgsne0 15757 lgsabs1 15758 lgsquadlem1 15796 lgsquadlem2 15797 isclwwlknx 16211 clwwlkn1 16213 |
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