Theorem a9ev 1685

Description: At least one individual exists. Weaker version of a9e 1684. (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 1518	1 |- E. x x = y

Syntax hints:   E.wex 1480

This theorem was proved from axioms:  ax-i9 1518

This theorem is referenced by:  spimfv  1687  ax6evr  1693  equsalv  1781  dfdif3  3232  snnex  4426  relop  4754  dmi  4819