Theorem pm5.35 942

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		pm5.1 902	. 2 |- ( ( ( ph -> ps ) /\ ( ph -> ch ) ) -> ( ( ph -> ps ) <-> ( ph -> ch ) ) )
2	1	pm5.74rd 263	1 |- ( ( ( ph -> ps ) /\ ( ph -> ch ) ) -> ( ph -> ( ps <-> ch ) ) )

Syntax hints:   -> wi 4   <-> wb 196   /\ wa 384

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8

This theorem depends on definitions:  df-bi 197  df-an 386

This theorem is referenced by: (None)