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Theorem exp4d 593
Description: An exportation inference. (Contributed by NM, 26-Apr-1994.)
Hypothesis
Ref Expression
exp4d.1  |-  ( ph  ->  ( ( ps  /\  ( ch  /\  th )
)  ->  ta )
)
Assertion
Ref Expression
exp4d  |-  ( ph  ->  ( ps  ->  ( ch  ->  ( th  ->  ta ) ) ) )

Proof of Theorem exp4d
StepHypRef Expression
1 exp4d.1 . . 3  |-  ( ph  ->  ( ( ps  /\  ( ch  /\  th )
)  ->  ta )
)
21exp3a 426 . 2  |-  ( ph  ->  ( ps  ->  (
( ch  /\  th )  ->  ta ) ) )
32exp4a 590 1  |-  ( ph  ->  ( ps  ->  ( ch  ->  ( th  ->  ta ) ) ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 359
This theorem is referenced by:  tfrlem9  6584  omass  6761  pssnn  7265  cardinfima  7913  ltexprlem7  8854  facdiv  11507  infpnlem1  13207  atcvatlem  23738  mdsymlem5  23760  mdsymlem7  23762  btwnconn1lem11  25747  exp5k  25999
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8
This theorem depends on definitions:  df-bi 178  df-an 361
  Copyright terms: Public domain W3C validator