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MathGroup Archive 2004

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Re: What does +- mean?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg47553] Re: [mg47519] What does +- mean?
  • From: Andrzej Kozlowski <akoz at mimuw.edu.pl>
  • Date: Fri, 16 Apr 2004 05:20:18 -0400 (EDT)
  • References: <200404150739.DAA11584@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

On 15 Apr 2004, at 16:39, Lautaro Vergara wrote:

> Hi,
>
> I have found (v. 5.0) an extrange thing: when one expands, e.g.,
>
> Series[Sqrt[-1/2+x^2],{x,0,4}]
>
> there appear a +- sign (which is correctly not present when one changes
> -1/2 by -1)
>
> is this a bug or a feature?
>
> Thanks
>
> L. Vergara
>
>
If you look at InputForm (or apply Normal) you will see these are just 
minuses , in other words a +- b is just a-b. So it looks like a bug in 
the way StandardForm and TraditionalForm display SeriesData objects.


Andrzej Kozlowski
Chiba, Japan
http://www.mimuw.edu.pl/~akoz/


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