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MathGroup Archive 2004

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Re: What does +- mean?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg47569] Re: What does +- mean?
  • From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
  • Date: Fri, 16 Apr 2004 05:20:42 -0400 (EDT)
  • Organization: Universitaet Leipzig
  • References: <c5lfbm$bq2$1@smc.vnet.net>
  • Reply-to: kuska at informatik.uni-leipzig.de
  • Sender: owner-wri-mathgroup at wolfram.com

Hi,

it is a bug int the formating of the series, because
Mathematica doen not see that 
a[0]+a[1]+a[2]+a[3]+..

with a[i]=-b[i] should be printed as

a[0]-b[1]-b[2]-b[3]+ ..

Regards
  Jens

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


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