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Theorem pm3.41 542
Description: Theorem *3.41 of [WhiteheadRussell] p. 113. (Contributed by NM, 3-Jan-2005.)
Assertion
Ref Expression
pm3.41  |-  ( (
ph  ->  ch )  -> 
( ( ph  /\  ps )  ->  ch )
)

Proof of Theorem pm3.41
StepHypRef Expression
1 simpl 443 . 2  |-  ( (
ph  /\  ps )  ->  ph )
21imim1i 54 1  |-  ( (
ph  ->  ch )  -> 
( ( ph  /\  ps )  ->  ch )
)
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 358
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8
This theorem depends on definitions:  df-bi 177  df-an 360
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