Theorem mpbirand 439

Description: Detach truth from conjunction in biconditional. (Contributed by Glauco Siliprandi, 3-Mar-2021.)

Hypotheses

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

Assertion

Ref	Expression
mpbirand	|- ( ph -> ( ps <-> th ) )

Proof of Theorem mpbirand

Step	Hyp	Ref	Expression
1		mpbirand.2	. 2 |- ( ph -> ( ps <-> ( ch /\ th ) ) )
2		mpbirand.1	. . 3 |- ( ph -> ch )
3	2	biantrurd 303	. 2 |- ( ph -> ( th <-> ( ch /\ th ) ) )
4	1, 3	bitr4d 190	1 |- ( ph -> ( ps <-> th ) )

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:  fprodssdc  11553  txmetcn  13313