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: 2216.
  • Alias: Esc \ Esc.
  • Infix operator.
  • x ∖ y is by default interpreted as Backslash[x, y].
  • Used in mathematics for set difference.
  • Also used to separate arguments of elliptic functions.
  • Sometimes used to indicate x divides y.