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Theorem pm3.43 832
Description: Theorem *3.43 (Comp) of [WhiteheadRussell] p. 113. (Contributed by NM, 3-Jan-2005.)
Assertion
Ref Expression
pm3.43  |-  ( ( ( ph  ->  ps )  /\  ( ph  ->  ch ) )  ->  ( ph  ->  ( ps  /\  ch ) ) )

Proof of Theorem pm3.43
StepHypRef Expression
1 pm3.43i 442 . 2  |-  ( (
ph  ->  ps )  -> 
( ( ph  ->  ch )  ->  ( ph  ->  ( ps  /\  ch ) ) ) )
21imp 418 1  |-  ( ( ( ph  ->  ps )  /\  ( ph  ->  ch ) )  ->  ( ph  ->  ( ps  /\  ch ) ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 358
This theorem is referenced by:  jcab  833  eqvinc  2896  pgapspf2  25464  jm2.18  26492  jm2.15nn0  26507  jm2.16nn0  26508  bnj1110  28291
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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