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Theorem pm4.76 838
Description: Theorem *4.76 of [WhiteheadRussell] p. 121. (Contributed by NM, 3-Jan-2005.)
Assertion
Ref Expression
pm4.76  |-  ( ( ( ph  ->  ps )  /\  ( ph  ->  ch ) )  <->  ( ph  ->  ( ps  /\  ch ) ) )

Proof of Theorem pm4.76
StepHypRef Expression
1 jcab 835 . 2  |-  ( (
ph  ->  ( ps  /\  ch ) )  <->  ( ( ph  ->  ps )  /\  ( ph  ->  ch )
) )
21bicomi 195 1  |-  ( ( ( ph  ->  ps )  /\  ( ph  ->  ch ) )  <->  ( ph  ->  ( ps  /\  ch ) ) )
Colors of variables: wff set class
Syntax hints:    -> wi 6    <-> wb 178    /\ wa 360
This theorem is referenced by:  fun11  5280  axgroth4  8449  dford4  26521
This theorem was proved from axioms:  ax-1 7  ax-2 8  ax-3 9  ax-mp 10
This theorem depends on definitions:  df-bi 179  df-an 362
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