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: F606.
  • Alias: Esc r|| Esc.
  • Matchfix operator.
  • Used in mathematics to indicate taking a norm.
  • Sometimes used for determinant.
  • Sometimes used to indicate a matrix.
  • Drawn in monospaced fonts with a small right-pointing tee to indicate direction.
  • Extensible character.