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Theorem con4d 2040
Description: Deduction derived from axiom ax-3 2039. (Contributed by NM, 26-Mar-1995.)
Hypothesis
Ref Expression
con4d.1
Assertion
Ref Expression
con4d

Proof of Theorem con4d
StepHypRef Expression
1 con4d.1 . 2
2 ax-3 2039 . 2
31, 2syl 13 1
Colors of variables: wff set class
Syntax hints:   wn 3   wi 4
This theorem is referenced by:  con1d  2041  pm2.18  2042  impcon4bid  2051  con4bid  2052
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-3 2039
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