ILE Home Intuitionistic Logic Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  ILE Home  >  Th. List  >  a9ev Unicode version

Theorem a9ev 1632
Description: At least one individual exists. Weaker version of a9e 1631. (Contributed by NM, 3-Aug-2017.)
Assertion
Ref Expression
a9ev  |-  E. x  x  =  y
Distinct variable group:    x, y

Proof of Theorem a9ev
StepHypRef Expression
1 ax-i9 1468 1  |-  E. x  x  =  y
Colors of variables: wff set class
Syntax hints:   E.wex 1426
This theorem was proved from axioms:  ax-i9 1468
This theorem is referenced by:  ax6evr  1638  dfdif3  3110  snnex  4271  relop  4586  dmi  4651
  Copyright terms: Public domain W3C validator