Theorem pm5.35 826

Description: Theorem *5.35 of [WhiteheadRussell] p. 125. (Contributed by NM, 3-Jan-2005.)

Assertion

Ref	Expression
pm5.35	|- ( ( ( ph -> ps ) /\ ( ph -> ch ) ) -> ( ph -> ( ps <-> ch ) ) )

Proof of Theorem pm5.35

Step	Hyp	Ref	Expression
1		pm5.1 533	. 2 |- ( ( ( ph -> ps ) /\ ( ph -> ch ) ) -> ( ( ph -> ps ) <-> ( ph -> ch ) ) )
2	1	pm5.74rd 172	1 |- ( ( ( ph -> ps ) /\ ( ph -> ch ) ) -> ( ph -> ( ps <-> ch ) ) )

Syntax hints:   -> wi 4   /\ wa 97   <-> wb 98

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 99  ax-ia2 100  ax-ia3 101

This theorem depends on definitions:  df-bi 110

This theorem is referenced by: (None)