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Topic: Re: [mg4998] Simplification of (a^2)*Sqrt[a^(-2)]
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Elias Saab

Posts: 7
Registered: 12/7/04
Re: [mg4998] Simplification of (a^2)*Sqrt[a^(-2)]
Posted: Nov 1, 1996 2:45 PM
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Use PowerExpand
Clear[a]
PowerExpand[ Sqrt[a^2]]

a


On Thu, 17 Oct 1996, Michael Hucka wrote:

> I've recently begun using Mathematica and have been encountering a curiousity
> that I hope someone can explain. The problem is that Mathematica sometimes
> leaves expressions with terms such as
>
> -2 2 -2 2
> Out[15]= Sqrt[a ] a Sqrt[b ] b ......
>
> in them. I guess this happens because the system doesn't know whether a > 0.
> For cases where I know a > 0, b > 0, what is the proper way of getting
> Mathematica to simplify these expressions down to (for this example) a b ?
>
> Thanks for any tips.
>
> --
> __ __
> Mike Hucka hucka@umich.edu http://ai.eecs.umich.edu/people/hucka [ \/ ]
> Ph.D. candidate, computational models of human visual processing ][\/][
> Programmer analyst & news admin at U. Michigan Dept. of EECS [__][__]
>









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