Theorem a9ev 1744

Description: At least one individual exists. Weaker version of a9e 1743. (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 1578	1 |- E. x x = y

Syntax hints:   E.wex 1540

This theorem was proved from axioms:  ax-i9 1578

This theorem is referenced by:  spimfv  1746  ax6evr  1752  equsalv  1840  dfdif3  3316  snnex  4547  relop  4882  dmi  4948