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Theorem exp42 594
Description: An exportation inference. (Contributed by NM, 26-Apr-1994.)
Hypothesis
Ref Expression
exp42.1
Assertion
Ref Expression
exp42

Proof of Theorem exp42
StepHypRef Expression
1 exp42.1 . . 3
21exp31 587 . 2
32exp3a 425 1
Colors of variables: wff setvar class
Syntax hints:   wi 4   wa 358
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 177  df-an 360
This theorem is referenced by:  f1o2d  5727
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