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Theorem syl3an2b 1222
Description: A syllogism inference. (Contributed by NM, 22-Aug-1995.)
Hypotheses
Ref Expression
syl3an2b.1  |-  ( ph  <->  ch )
syl3an2b.2  |-  ( ( ps  /\  ch  /\  th )  ->  ta )
Assertion
Ref Expression
syl3an2b  |-  ( ( ps  /\  ph  /\  th )  ->  ta )

Proof of Theorem syl3an2b
StepHypRef Expression
1 syl3an2b.1 . . 3  |-  ( ph  <->  ch )
21biimpi 188 . 2  |-  ( ph  ->  ch )
3 syl3an2b.2 . 2  |-  ( ( ps  /\  ch  /\  th )  ->  ta )
42, 3syl3an2 1219 1  |-  ( ( ps  /\  ph  /\  th )  ->  ta )
Colors of variables: wff set class
Syntax hints:    -> wi 4    <-> wb 178    /\ w3a 937
This theorem is referenced by:  omlimcl  6850  cflim2  8174  isdrngd  15891  rintopn  17013  cmpcld  17496  cgrcomlr  25963  pmapglb  30665
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  df-an 362  df-3an 939
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