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Mirrors > Home > ILE Home > Th. List > iftrue | Unicode version |
Description: Value of the conditional operator when its first argument is true. (Contributed by NM, 15-May-1999.) (Proof shortened by Andrew Salmon, 26-Jun-2011.) |
Ref | Expression |
---|---|
iftrue |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-if 3516 | . 2 | |
2 | dedlema 958 | . . 3 | |
3 | 2 | abbi2dv 2283 | . 2 |
4 | 1, 3 | eqtr4id 2216 | 1 |
Colors of variables: wff set class |
Syntax hints: wn 3 wi 4 wa 103 wo 698 wceq 1342 wcel 2135 cab 2150 cif 3515 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in2 605 ax-io 699 ax-5 1434 ax-7 1435 ax-gen 1436 ax-ie1 1480 ax-ie2 1481 ax-8 1491 ax-11 1493 ax-4 1497 ax-17 1513 ax-i9 1517 ax-ial 1521 ax-i5r 1522 ax-ext 2146 |
This theorem depends on definitions: df-bi 116 df-nf 1448 df-sb 1750 df-clab 2151 df-cleq 2157 df-clel 2160 df-if 3516 |
This theorem is referenced by: iftruei 3521 iftrued 3522 ifsbdc 3527 ifcldadc 3544 ifbothdadc 3546 ifbothdc 3547 ifiddc 3548 ifcldcd 3550 ifandc 3551 fidifsnen 6827 nnnninf 7081 nnnninf2 7082 mkvprop 7113 uzin 9489 fzprval 10007 fztpval 10008 modifeq2int 10311 bcval 10651 bcval2 10652 sumrbdclem 11304 fsum3cvg 11305 summodclem2a 11308 isumss2 11320 fsum3ser 11324 fsumsplit 11334 sumsplitdc 11359 prodrbdclem 11498 fproddccvg 11499 iprodap 11507 iprodap0 11509 prodssdc 11516 fprodsplitdc 11523 flodddiv4 11856 gcd0val 11878 dfgcd2 11932 eucalgf 11966 eucalginv 11967 eucalglt 11968 phisum 12149 pc0 12213 pcgcd 12237 pcmptcl 12249 pcmpt 12250 pcmpt2 12251 pcprod 12253 fldivp1 12255 unct 12312 dvexp2 13217 nnsf 13719 nninfsellemsuc 13726 |
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