This is documentation for Mathematica 6, which was
based on an earlier version of the Wolfram Language.
View current documentation (Version 11.1)
Mathematica Character Name

\[LeftDoubleBracketingBar]

  • Unicode: F605.
  • Alias: Esc l|| 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 left-pointing tee to indicate direction.
  • Extensible character.