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Theorem simp23 1027
Description: Simplification of doubly triple conjunction. (Contributed by NM, 17-Nov-2011.)
Assertion
Ref Expression
simp23  |-  ( (
ph  /\  ( ps  /\ 
ch  /\  th )  /\  ta )  ->  th )

Proof of Theorem simp23
StepHypRef Expression
1 simp3 994 . 2  |-  ( ( ps  /\  ch  /\  th )  ->  th )
213ad2ant2 1014 1  |-  ( (
ph  /\  ( ps  /\ 
ch  /\  th )  /\  ta )  ->  th )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ w3a 973
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107
This theorem depends on definitions:  df-bi 116  df-3an 975
This theorem is referenced by:  simpl23  1072  simpr23  1081  simp123  1126  simp223  1135  simp323  1144  funtpg  5247
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