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Theorem aisbbisfaisf 27860
Description: Given a is equivalent to b, b is equivalent to F. there exists a proof for a is equivalent to F. (Contributed by Jarvin Udandy, 30-Aug-2016.)
Hypotheses
Ref Expression
aisbbisfaisf.1  |-  ( ph  <->  ps )
aisbbisfaisf.2  |-  ( ps  <->  F.  )
Assertion
Ref Expression
aisbbisfaisf  |-  ( ph  <->  F.  )

Proof of Theorem aisbbisfaisf
StepHypRef Expression
1 aisbbisfaisf.1 . 2  |-  ( ph  <->  ps )
2 aisbbisfaisf.2 . 2  |-  ( ps  <->  F.  )
31, 2bitri 242 1  |-  ( ph  <->  F.  )
Colors of variables: wff set class
Syntax hints:    <-> wb 178    F. wfal 1327
This theorem is referenced by:  mdandysum2p2e4  27934
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8
This theorem depends on definitions:  df-bi 179
  Copyright terms: Public domain W3C validator