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MathGroup Archive 1993

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Re: Pattern Matching Bug

  • To: mathgroup at
  • Subject: Re: Pattern Matching Bug
  • From: keiper
  • Date: Sun, 21 Feb 93 18:21:15 CST

	> -I should be rather represented as Times[-1,Complex[0,1]]
        > internally as it is done for -x (Times[-1,x]).

        > *****

        > I totally agree. 

But then you would have  NumberQ[-I]  giving False.  Moreover, by that
argument  -3  should really be Times[-1, 3].  The number I really is a
number, not just a symbol like x.

Jerry B. Keiper
keiper at

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