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Theorem iftruei 3608
Description: Inference associated with iftrue 3607. (Contributed by BJ, 7-Oct-2018.)
Hypothesis
Ref Expression
iftruei.1 𝜑
Assertion
Ref Expression
iftruei if(𝜑, 𝐴, 𝐵) = 𝐴

Proof of Theorem iftruei
StepHypRef Expression
1 iftruei.1 . 2 𝜑
2 iftrue 3607 . 2 (𝜑 → if(𝜑, 𝐴, 𝐵) = 𝐴)
31, 2ax-mp 5 1 if(𝜑, 𝐴, 𝐵) = 𝐴
Colors of variables: wff set class
Syntax hints:   = wceq 1395  ifcif 3602
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in2 618  ax-io 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-11 1552  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-ext 2211
This theorem depends on definitions:  df-bi 117  df-nf 1507  df-sb 1809  df-clab 2216  df-cleq 2222  df-clel 2225  df-if 3603
This theorem is referenced by:  ctmlemr  7286  xnegpnf  10036  xnegmnf  10037  xaddpnf1  10054  xaddpnf2  10055  xaddmnf1  10056  xaddmnf2  10057  pnfaddmnf  10058  mnfaddpnf  10059  iseqf1olemqk  10741  exp0  10777  swrd00g  11196  sumsnf  11935  prodsnf  12118  lcm0val  12602  ennnfonelemj0  12987  ennnfonelem0  12991  mulg0  13677  lgs0  15707  lgs2  15711  2lgs2  15796  peano3nninf  16433  dceqnconst  16488
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