Theorem a9ev 1723

Description: At least one individual exists. Weaker version of a9e 1722. (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 1556	1 |- E. x x = y

Syntax hints:   E.wex 1518

This theorem was proved from axioms:  ax-i9 1556

This theorem is referenced by:  spimfv  1725  ax6evr  1731  equsalv  1819  dfdif3  3294  snnex  4516  relop  4849  dmi  4915