MathGroup Archive 2005

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Function, Command, Operator, Object...etc.

  • To: mathgroup at
  • Subject: [mg61350] Function, Command, Operator, Object...etc.
  • From: "Steven T. Hatton" <hattons at>
  • Date: Sun, 16 Oct 2005 00:18:03 -0400 (EDT)
  • Sender: owner-wri-mathgroup at

Section 2.1.2 of The Mathematica Book for 5.2 discusses different ways to
interpret parts of expressions.  The examples given are "Function, Command,
Operator, Head and Object type."  Do these terms have any meaning within
the Mathematica language, or are these purely conceptual ideas intended to
aid the user in understanding the language?  Are these terms given formal
definitions as regards their meaning when used to discuss Mathematica?  If
so, where might I find these definitions?
"Philosophy is written in this grand book, The Universe. ... But the book
cannot be understood unless one first learns to comprehend the language...
in which it is written. It is written in the language of mathematics, ...;
without which wanders about in a dark labyrinth."   The Lion of Gaul

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