MathGroup Archive 2004

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What does +- mean?

  • To: mathgroup at
  • Subject: [mg47519] What does +- mean?
  • From: Lautaro Vergara <lvergara at>
  • Date: Thu, 15 Apr 2004 03:39:29 -0400 (EDT)
  • Sender: owner-wri-mathgroup at


I have found (v. 5.0) an extrange thing: when one expands, e.g.,


there appear a +- sign (which is correctly not present when one changes
-1/2 by -1)

is this a bug or a feature?


L. Vergara

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