Theorem a9ev 1721

Description: At least one individual exists. Weaker version of a9e 1720. (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 1554	1 |- E. x x = y

Syntax hints:   E.wex 1516

This theorem was proved from axioms:  ax-i9 1554

This theorem is referenced by:  spimfv  1723  ax6evr  1729  equsalv  1817  dfdif3  3284  snnex  4499  relop  4832  dmi  4898