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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 2975 eldifvsn 3831 bnd2 4291 opbrop 4834 opelresi 5054 funcnv3 5423 fnssresb 5475 dff1o5 5628 fneqeql2 5792 fnniniseg2 5806 dffo3 5829 fmptco 5848 fnressn 5875 fconst4m 5909 riota2df 6033 eloprabga 6148 suppimacnvfn 6459 mptsuppd 6469 suppssrst 6474 suppssrgst 6475 frecabcl 6643 mptelixpg 6982 exmidfodomrlemreseldju 7516 enq0breq 7767 genpassl 7855 genpassu 7856 elnnnn0 9556 peano2z 9630 znnsub 9646 znn0sub 9660 uzin 9905 nn01to3 9967 rpnegap 10037 negelrp 10038 xsubge0 10233 divelunit 10354 elfz5 10370 uzsplit 10448 elfzonelfzo 10597 infssuzex 10615 adddivflid 10676 divfl0 10680 hashfibclem 11231 swrdspsleq 11384 2shfti 11541 rexuz3 11700 clim2c 11994 fisumss 12103 bitsmod 12667 bitscmp 12669 bezoutlemmain 12719 nninfctlemfo 12761 dvdsfi 12961 pc2dvds 13053 1arith 13090 xpsfrnel 13608 xpsfrnel2 13610 ghmeqker 14024 lsslss 14655 zndvds 14923 znleval2 14928 eltg3 15048 lmbrf 15206 cnrest2 15227 cnptoprest 15230 cnptoprest2 15231 ismet2 15345 elbl2ps 15383 elbl2 15384 xblpnfps 15389 xblpnf 15390 bdxmet 15492 metcn 15505 cnbl0 15525 cnblcld 15526 mulc1cncf 15580 ellimc3apf 15651 pilem1 15770 wilthlem1 15974 lgsdilem 16026 lgsne0 16037 lgsabs1 16038 lgsquadlem1 16076 lgsquadlem2 16077 isclwwlknx 16537 clwwlkn1 16539 |
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