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Theorem a9ev 1584
Description: At least one individual exists. Weaker version of a9e 1583. (Contributed by NM, 3-Aug-2017.)
Assertion
Ref Expression
a9ev x x = y
Distinct variable group:   x,y

Proof of Theorem a9ev
StepHypRef Expression
1 ax-i9 1420 1 x x = y
Colors of variables: wff set class
Syntax hints:  wex 1378
This theorem was proved from axioms:  ax-i9 1420
This theorem is referenced by:  snnex  4147  relop  4429  dmi  4493
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