Theorem a9ev 1587

Description: At least one individual exists. Weaker version of a9e 1586. (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 1423	1 |- E. x x = y

Syntax hints:   E.wex 1381

This theorem was proved from axioms:  ax-i9 1423

This theorem is referenced by:  snnex  4181  relop  4486  dmi  4550