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Theorem a9ev 1690
Description: At least one individual exists. Weaker version of a9e 1689. (Contributed by NM, 3-Aug-2017.)
Assertion
Ref Expression
a9ev  |-  E. x  x  =  y
Distinct variable group:    x, y

Proof of Theorem a9ev
StepHypRef Expression
1 ax-i9 1523 1  |-  E. x  x  =  y
Colors of variables: wff set class
Syntax hints:   E.wex 1485
This theorem was proved from axioms:  ax-i9 1523
This theorem is referenced by:  spimfv  1692  ax6evr  1698  equsalv  1786  dfdif3  3237  snnex  4431  relop  4759  dmi  4824
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