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Theorem 3simpb 962
Description: Simplification of triple conjunction. (Contributed by NM, 21-Apr-1994.)
Assertion
Ref Expression
3simpb  |-  ( (
ph  /\  ps  /\  ch )  ->  ( ph  /\  ch ) )

Proof of Theorem 3simpb
StepHypRef Expression
1 3ancomb 953 . 2  |-  ( (
ph  /\  ps  /\  ch ) 
<->  ( ph  /\  ch  /\ 
ps ) )
2 3simpa 961 . 2  |-  ( (
ph  /\  ch  /\  ps )  ->  ( ph  /\  ch ) )
31, 2sylbi 120 1  |-  ( (
ph  /\  ps  /\  ch )  ->  ( ph  /\  ch ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 103    /\ 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:  3adant2  983  3adantl2  1121  3adantr2  1124  enq0tr  7190  ixxssixx  9578  rebtwn2zlemshrink  9924  zsumdc  11045  muldvds1  11366  dvds2add  11375  dvds2sub  11376  dvdstr  11378  pw2dvdslemn  11688  ctinf  11788
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