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

\[LeftDoubleBracket]

  • Unicode: 301A.
  • Alias: Esc [[ Esc.
  • Compound operator with built-in evaluation rules.
  • m〚i, j, ... 〛 is by default interpreted as Part[m, i, j, ...].
  • Sometimes used in mathematics to indicate a class of algebraic objects with certain variables or extensions.
  • Extensible character; grows by default to limited size.