MathGroup Archive 1996

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x' times O[x]?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg3672] x' times O[x]?
  • From: bruck at mtha.usc.edu (Ronald Bruck)
  • Date: Tue, 2 Apr 1996 21:57:47 -0500
  • Organization: University of Southern California, Los Angeles, CA
  • Sender: owner-wri-mathgroup at wolfram.com

A student has just pointed out a strange behavior of Mathematica with the
Series command.  It can be exemplified by:


The answer which Mathematica returns is


Or:

which returns

                                             (3)
                                          (0)      2       3
(0)' + ((0)' + (0)'') x + ((0)' + (0)'' + ------) x  + O[x]
                                            2

Can anybody explain what's going on here?  Trace doesn't seem to help.

--Ron Bruck

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