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Theorem a7s 1340
Description: Swap quantifiers in an antecedent. (Contributed by NM, 5-Aug-1993.)
Hypothesis
Ref Expression
a7s.1
Assertion
Ref Expression
a7s

Proof of Theorem a7s
StepHypRef Expression
1 ax-7 1334 . 2
2 a7s.1 . 2
31, 2syl 14 1
Colors of variables: wff set class
Syntax hints:   wi 4  wal 1240
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-7 1334
This theorem is referenced by:  cbv2h  1631  hbsb4t  1886  mor  1939
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