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Re: Sqrt[R^2]

  • To: mathgroup at smc.vnet.net
  • Subject: [mg42746] Re: [mg42716] Sqrt[R^2]
  • From: Murray Eisenberg <murray at math.umass.edu>
  • Date: Thu, 24 Jul 2003 04:10:48 -0400 (EDT)
  • Organization: Mathematics & Statistics, Univ. of Mass./Amherst
  • References: <200307230425.AAA29114@smc.vnet.net>
  • Reply-to: murray at math.umass.edu
  • Sender: owner-wri-mathgroup at wolfram.com

   Simplify[Sqrt[R^2], R > 0]
R

In Mathematica 5.0, also:

   Assuming[R > 0, Simplify[Sqrt[R^2]]]
R



Prechtl Josef wrote:
> How can I instruct Mathematica when simplifying expressions to convert
> expressions e.g. Sqrt[R^2] into R? i.e. only to restrict to the case
> that the variable R is a positive real?
> 
> thank you in advance for any help!
> 
> 

-- 
Murray Eisenberg                     murray at math.umass.edu
Mathematics & Statistics Dept.
Lederle Graduate Research Tower      phone 413 549-1020 (H)
University of Massachusetts                413 545-2859 (W)
710 North Pleasant Street            fax   413 545-1801
Amherst, MA 01003-9305


  • References:
    • Sqrt[R^2]
      • From: Prechtl Josef <e9426270@stud4.tuwien.ac.at>
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