Theorem pm5.32ri 455

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 454	. 2 |- ( ( ph /\ ps ) <-> ( ph /\ ch ) )
3		ancom 266	. 2 |- ( ( ps /\ ph ) <-> ( ph /\ ps ) )
4		ancom 266	. 2 |- ( ( ch /\ ph ) <-> ( ph /\ ch ) )
5	2, 3, 4	3bitr4i 212	1 |- ( ( ps /\ ph ) <-> ( ch /\ ph ) )

Syntax hints:   -> wi 4   /\ wa 104   <-> wb 105

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108

This theorem depends on definitions:  df-bi 117

This theorem is referenced by:  anbi1i  458  pm5.36  614  pm5.61  802  oranabs  823  ceqsralt  2831  ceqsrexbv  2938  reuind  3012  rabsn  3740  dfoprab2  6078  xpsnen  7048  sspw1or2  7446  nn1suc  9204  isprm2  12752  ismnd  13565  dfgrp2e  13674  isxms2  15246  clwwlkn1  16342  clwwlkn2  16345