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MathGroup Archive 2000

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Re: Simlifying Sqrt[x^2] type args.

  • To: mathgroup at smc.vnet.net
  • Subject: [mg24581] Re: Simlifying Sqrt[x^2] type args.
  • From: Harald Giese <giese at ifm.uni-hamburg.de>
  • Date: Tue, 25 Jul 2000 00:56:13 -0400 (EDT)
  • Organization: Institut fuer Meereskunde, Universitaet Hamburg
  • References: <8lgsmk$2d0@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Jaime Morales wrote:
> 
> I am curious if there is a way to do symbolics in mathematica
> where objects like
> 
> Sqrt[k^2 r^2 Sin[theta]^2]
> 
> are set to
> 
> k r Sin[theta]
> 


Hi Jaime,

If k and r are real values >= 0, then you can try to specify this in
advance as for Simplify:

Simplify[Sqrt[k^2 r^2 Sin[theta]^2], {k >= 0, r >= 0}]

Hope that helps,
Harald

-- 

Harald Giese
Email: giese at ifm.uni-hamburg.de
Phone: +49 (0)40 42838 5796; Fax: +49 (0)40 5605724
Institut fuer Meereskunde der Universitaet Hamburg
(Institute of Oceanography of the University of Hamburg)
Troplowitzstrasse 7, D-22529 Hamburg


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