Theorem pm5.32ri 452

Description: Distribution of implication over biconditional (inference form). (Contributed by NM, 12-Mar-1995.)

Hypothesis

Ref	Expression
pm5.32i.1	|- ( ph -> ( ps <-> ch ) )

Assertion

Ref	Expression
pm5.32ri	|- ( ( ps /\ ph ) <-> ( ch /\ ph ) )

Proof of Theorem pm5.32ri

Step	Hyp	Ref	Expression
1		pm5.32i.1	. . 3 |- ( ph -> ( ps <-> ch ) )
2	1	pm5.32i 451	. 2 |- ( ( ph /\ ps ) <-> ( ph /\ ch ) )
3		ancom 264	. 2 |- ( ( ps /\ ph ) <-> ( ph /\ ps ) )
4		ancom 264	. 2 |- ( ( ch /\ ph ) <-> ( ph /\ ch ) )
5	2, 3, 4	3bitr4i 211	1 |- ( ( ps /\ ph ) <-> ( ch /\ ph ) )

Syntax hints:   -> wi 4   /\ wa 103   <-> wb 104

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107

This theorem depends on definitions:  df-bi 116

This theorem is referenced by:  anbi1i  455  pm5.36  605  pm5.61  789  oranabs  810  ceqsralt  2757  ceqsrexbv  2861  reuind  2935  rabsn  3650  dfoprab2  5900  xpsnen  6799  nn1suc  8897  isprm2  12071  ismnd  12655  dfgrp2e  12733  isxms2  13246