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Theorem simp11 934
Description: Simplification of doubly triple conjunction. (Contributed by NM, 17-Nov-2011.)
Assertion
Ref Expression
simp11  |-  ( ( ( ph  /\  ps  /\ 
ch )  /\  th  /\  ta )  ->  ph )

Proof of Theorem simp11
StepHypRef Expression
1 simp1 904 . 2  |-  ( (
ph  /\  ps  /\  ch )  ->  ph )
213ad2ant1 925 1  |-  ( ( ( ph  /\  ps  /\ 
ch )  /\  th  /\  ta )  ->  ph )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ w3a 885
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 99  ax-ia2 100  ax-ia3 101
This theorem depends on definitions:  df-bi 110  df-3an 887
This theorem is referenced by:  simpl11  979  simpr11  988  simp111  1033  simp211  1042  simp311  1051
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