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MathGroup Archive 1990

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Re: Possible Collect bug

  • To: mathgroup at yoda.ncsa.uiuc.edu
  • Subject: Re: Possible Collect bug
  • From: uunet!mark.stat.purdue.edu!mds
  • Date: Fri, 24 Aug 90 07:54:41 -0500

If I understand the recent messages from Howard Fink <fink at acf5.nyu.edu>,
Peter Horan <peter at aragorn.cm.deakin.oz>, and John Mitchell
<mitchell at pico.uchicago.edu>,and am not confused now :-), below is a
simple example demonstrating a problem with the Collect[] function.

	Mathematica (sun3.fpa) 1.2 (November 6, 1989) [With pre-loaded data]

	In[1]:= Collect[(-1)^(-1+2n),x]  (* note no x in first argument *)

	            2 n
	Out[1]= (-1)

Mark Senn
Purdue University
mds at pop.stat.purdue.edu


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