This is documentation for Mathematica 6, which was
based on an earlier version of the Wolfram Language.
View current documentation (Version 11.2)
Mathematica Character Name


  • Unicode: 2250.
  • Alias: Esc .= Esc.
  • Infix similarity operator.
  • x ≐ y is by default interpreted as DotEqual[x, y].
  • Used to mean approximately equal, or in some cases, "image of", or "equal by definition".