Re: Simplification of (a^2)*Sqrt[a^(-2)]
- To: mathgroup at smc.vnet.net
- Subject: [mg5126] Re: [mg4998] Simplification of (a^2)*Sqrt[a^(-2)]
- From: Elias Saab <mathes at math.missouri.edu>
- Date: Wed, 6 Nov 1996 01:32:45 -0500
- Sender: owner-wri-mathgroup at wolfram.com
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 at 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 [__][__] >