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Through

  • Through[ p [ , ][ x ]] gives p [ [ x ], [ x ]].
  • Through[ expr , h ] performs the transformation wherever h occurs in the head of expr.
  • Example: Through[(f + g)[x, y]].
  • Through distributes operators that appear inside the heads of expressions.
  • See the Mathematica book: Section 2.2.9.
  • See also: Operate.