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Re: Complex Variables

• To: mathgroup at smc.vnet.net
• Subject: [mg55421] Re: Complex Variables
• From: Torsten Coym <torsten.coym at eas.iis.fraunhofer.de>
• Date: Wed, 23 Mar 2005 05:34:33 -0500 (EST)
• Organization: Fraunhofer Gesellschaft (http://www.fraunhofer.de/)
• References: <d1on33$nbs$1@smc.vnet.net>
• Sender: owner-wri-mathgroup at wolfram.com

This does not declare the symbols to be real, but it solves the given 
example, since ComplexExpand[] assumes all variables in the expression 
to be real:

In[1]:=
ComplexExpand[Conjugate[x+I y]]

Out[1]=
x-\[ImaginaryI] y

Torsten

wwolfe18 at comcast.net wrote:
> This has been annoying me for a while.
> Is there a way to declare symbols to be real so that
> Re[x + i y]  gives x and Conjugate[x + i y] gives x - i y etc?
> 
> Warren Wolfe
> 
> 
>