Theorem mpbiran 881

Description: Detach truth from conjunction in biconditional. (Contributed by NM, 27-Feb-1996.) (Revised by NM, 9-Jan-2015.)

Hypotheses

Ref	Expression
mpbiran.1	|- ps
mpbiran.2	|- ( ph <-> ( ps /\ ch ) )

Assertion

Ref	Expression
mpbiran	|- ( ph <-> ch )

Proof of Theorem mpbiran

Step	Hyp	Ref	Expression
1		mpbiran.2	. 2 |- ( ph <-> ( ps /\ ch ) )
2		mpbiran.1	. . 3 |- ps
3	2	biantrur 297	. 2 |- ( ch <-> ( ps /\ ch ) )
4	1, 3	bitr4i 185	1 |- ( ph <-> ch )

Syntax hints:   /\ wa 102   <-> wb 103

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 104  ax-ia2 105  ax-ia3 106

This theorem depends on definitions:  df-bi 115

This theorem is referenced by:  mpbir2an  883  unssdif  3199  unssin  3203  inssun  3204  invdif  3206  opabm  4035  regexmidlem1  4276  elirr  4284  en2lp  4297  wessep  4320  peano5  4339  relop  4504  ssrnres  4783  funopab  4955  funcnv2  4979  funcnveq  4982  fnres  5035  idref  5417  rnoprab  5607  lbfzo0  9190