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

Step	Hyp	Ref	Expression
1		ax-i9 1523	1 |- E. x x = y

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  4433  relop  4761  dmi  4826