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Re: Units question

  • To: mathgroup at smc.vnet.net
  • Subject: [mg115503] Re: Units question
  • From: Murray Eisenberg <murray at math.umass.edu>
  • Date: Thu, 13 Jan 2011 03:24:51 -0500 (EST)

Even after loading the Units package, Mathematica doesn't know that 
Meter and Second are positive.

My naive sense is that this is just plain stupid. Am I missing something 
here?

On 1/12/2011 4:07 AM, Bob Hanlon wrote:
> Simplify[Sqrt[Meter^2/Second^2] Second/Meter^2,
>   {Meter>  0, Second>  0}]
>
> 1/Meter
>
>
> Sqrt[Meter^2/Second^2] Second/Meter^2 // PowerExpand
>
> 1/Meter
>
>
> Bob Hanlon
>
> ---- Ted Sariyski<tsariysk at craft-tech.com>  wrote:
>
> =============
> Hi,
> Working with units I get correct result:
>
> Sqrt[Meter^2/Second^2] Second)/Meter^2
>
>    How to tell Mathematica to simplify the result to Meter^-1?
> Simplify and FullSimplify doesn't do the job.
> Thanks in advance,
> --Ted
>
>

-- 
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


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