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Theorem a9ev 1643
Description: At least one individual exists. Weaker version of a9e 1642. (Contributed by NM, 3-Aug-2017.)
Ref Expression
a9ev 𝑥 𝑥 = 𝑦
Distinct variable group:   𝑥,𝑦

Proof of Theorem a9ev
StepHypRef Expression
1 ax-i9 1478 1 𝑥 𝑥 = 𝑦
Colors of variables: wff set class
Syntax hints:  wex 1436
This theorem was proved from axioms:  ax-i9 1478
This theorem is referenced by:  ax6evr  1649  dfdif3  3133  snnex  4307  relop  4627  dmi  4692
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