This is documentation for Mathematica 8, which was
based on an earlier version of the Wolfram Language.
View current documentation (Version 11.2)


  • Unicode: F74C.
  • Alias: Esc dd Esc.
  • Compound operator with built-in evaluation rules.
  • can only be interpreted by default when it appears with or other integral operators.
  • f x is by default interpreted as Integrate.
  • \[DifferentialD] is also used in TraditionalForm to indicate total derivatives.