Theorem a9ev 1711

Description: At least one individual exists. Weaker version of a9e 1710. (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 1544	1 |- E. x x = y

Syntax hints:   E.wex 1506

This theorem was proved from axioms:  ax-i9 1544

This theorem is referenced by:  spimfv  1713  ax6evr  1719  equsalv  1807  dfdif3  3274  snnex  4484  relop  4817  dmi  4882