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Re: Beginner-type question

• To: mathgroup at smc.vnet.net
• Subject: [mg4057] Re: [mg4028] Beginner-type question
• From: "Keith S. Mersman" <c621746 at everest.cclabs.missouri.edu>
• Date: Thu, 30 May 1996 02:48:55 -0400
• Sender: owner-wri-mathgroup at wolfram.com

Use the option:

PowerExpand
On Mon, 20 May 1996, Rob Lopez wrote:

> I often encounter output of the form
> 	Out[1]= Sqrt[a^2] ,
> where I know a is real and positive, and therefore would like to see
> 	Out[1]= a .
> How do I get Mathematica to assume that all quantities are real? Real
> and positive? Can this be done globally, for an entire session?
> 
> Thanks in advance.
> 
> -----------------------------------------------------------------------------------------
> Rob Lopez
> Department of Physics
> University of Chicago
> -----------------------------------------------------------------------------------------
> 
> 
> 
> 

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