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Theorem ibar 301
Description: Introduction of antecedent as conjunct. (Contributed by NM, 5-Dec-1995.) (Revised by NM, 24-Mar-2013.)
Assertion
Ref Expression
ibar (𝜑 → (𝜓 ↔ (𝜑 ∧ 𝜓)))

Proof of Theorem ibar
StepHypRef Expression
1 pm3.2 139 . 2 (𝜑 → (𝜓 → (𝜑 ∧ 𝜓)))
2 simpr 110 . 2 ((𝜑 ∧ 𝜓) → 𝜓)
31, 2impbid1 142 1 (𝜑 → (𝜓 ↔ (𝜑 ∧ 𝜓)))
Colors of variables:    wff set class
This proof depends on syntax axioms:   → wi 4   ∧ wa 104   ↔ wb 105
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia2 107  ax-ia3 108
This proof depends on definitions:  df-bi 117
This theorem is used by:  biantrur  303  biantrurd  305  anclb  319  pm5.42  320  pm5.32  457  anabs5  579  pm5.33  617  bianabs  619  annotanannot  680  baib  931  baibd  935  anxordi  1449  euan  2143  eueq3dc  3000  ifandc  3681  xpcom  5337  fvopab3g  5781  riota1a  6062  opabfi  7253  2omap  7325  ctssdccl  7458  2omotaplemap  7630  recmulnqg  7765  ltexprlemloc  7981  mul0eqap  9009  eluz2  9943  rpnegap  10104  elfz2  10435  zmodid2  10810  shftfib  11610  dvdsssfz1  12644  modremain  12721  ballotfilemdifcfz  13285  ctiunctlemudc  13386  issubg  14035  resgrpisgrp  14057  sscntz  14158  qusecsub  14225  issubrng  14616  issubrg  14638  txcnmpt  15532  reopnap  15805  ellimc3apf  15919  bpos  16353  ralrals  17389  ralals  17395
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