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Re: Re[] function

  • To: mathgroup at smc.vnet.net
  • Subject: [mg105981] Re: [mg105957] Re[] function
  • From: Leonid Shifrin <lshifr at gmail.com>
  • Date: Tue, 29 Dec 2009 01:18:26 -0500 (EST)
  • References: <200912280955.EAA01706@smc.vnet.net>

Fabian,

Things like Element, ComplexExpand work locally - they do not assign global
properties to symbols. Here are a couple of  threads where  similar issues
were discussed:

http://groups.google.com/group/comp.soft-sys.math.mathematica/browse_thread/thread/5d90a2a2f697f7c8/

http://groups.google.com/group/comp.soft-sys.math.mathematica/browse_thread/thread/a977993b567866d4/

Regards,
Leonid





On Mon, Dec 28, 2009 at 12:55 PM, Fabian <fabian.uriarte at gmail.com> wrote:

> Dear Group-
>
> Why can't Mathematica evaluate "Re[]" here ?
>
> {Rm, Xm} \[Element] Reals;
> Z = (Rm*\[ImaginaryJ] Xm)/(Rm + \[ImaginaryJ]*Xm);
> Z = ComplexExpand[Z]
> Re[Z]
>
> -Thank you
>
>



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