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Theorem a4i 1361
Description: Inference rule reversing generalization. (Contributed by NM, 5-Aug-1993.)
Hypothesis
Ref Expression
a4i.1
Assertion
Ref Expression
a4i

Proof of Theorem a4i
StepHypRef Expression
1 a4i.1 . 2
2 ax-4 1333 . 2
31, 2ax-mp 7 1
Colors of variables: wff set class
Syntax hints:  wal 1266
This theorem is referenced by:  19.8a  1407
This theorem was proved from axioms:  ax-mp 7  ax-4 1333
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