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Theorem simp13 996
Description: Simplification of doubly triple conjunction. (Contributed by NM, 17-Nov-2011.)
Assertion
Ref Expression
simp13  |-  ( ( ( ph  /\  ps  /\ 
ch )  /\  th  /\  ta )  ->  ch )

Proof of Theorem simp13
StepHypRef Expression
1 simp3 966 . 2  |-  ( (
ph  /\  ps  /\  ch )  ->  ch )
213ad2ant1 985 1  |-  ( ( ( ph  /\  ps  /\ 
ch )  /\  th  /\  ta )  ->  ch )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ w3a 945
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 105  ax-ia2 106  ax-ia3 107
This theorem depends on definitions:  df-bi 116  df-3an 947
This theorem is referenced by:  simpl13  1041  simpr13  1050  simp113  1095  simp213  1104  simp313  1113  funtpg  5132  dvdsgcd  11543
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