Theorem mpbiran2 954

Description: Detach truth from conjunction in biconditional. (Contributed by NM, 22-Feb-1996.) (Revised by NM, 9-Jan-2015.)

Hypotheses

Ref	Expression
mpbiran2.1	|- ch
mpbiran2.2	|- ( ph <-> ( ps /\ ch ) )

Assertion

Ref	Expression
mpbiran2	|- ( ph <-> ps )

Proof of Theorem mpbiran2

Step	Hyp	Ref	Expression
1		mpbiran2.2	. 2 |- ( ph <-> ( ps /\ ch ) )
2		mpbiran2.1	. . 3 |- ch
3	2	biantru 302	. 2 |- ( ps <-> ( ps /\ ch ) )
4	1, 3	bitr4i 187	1 |- ( ph <-> ps )

This proof depends on syntax axioms:   /\ wa 104   <-> wb 105

This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108

This proof depends on definitions:  df-bi 117

This theorem is used by:  reueq  3025  ss0b  3562  eusv1  4600  eusv2nf  4604  eusv2  4605  opthprc  4828  opelres  5070  f1cnvcnv  5612  fores  5628  f1orn  5652  funfvdm  5769  fdmrn  6037  dfoprab2  6138  tpostpos  6540  opelreal  8200  elreal2  8203  eqresr  8209  axprecex  8253  zeoxor  12660  isprm2  12919  toptopon  15261  bdeq0  17115  subctctexmid  17252