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Re: AW: about real part

  • To: mathgroup at smc.vnet.net
  • Subject: [mg41197] Re: AW: [mg41176] about real part
  • From: Duanxiang Xu <duanxiangxu at yahoo.com>
  • Date: Wed, 7 May 2003 03:51:12 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

Thank you for your information.

Is that to say, there is no way to evaluate such kind
of expression?

Regards,
Duanxiang
--- Matthias.Bode at oppenheim.de wrote:
> Hello Duanxiang Xu,
> 
> 1."Re[z] gives the real part of the complex number
> z."
> 
> 2."Re[expr] is left unevaluated if expr is not a
> numeric quantity."
> 
> Best regards,
> Matthias Bode
> Sal. Oppenheim jr. & Cie. KGaA
> Koenigsberger Strasse 29
> D-60487 Frankfurt am Main
> GERMANY
> Tel.: +49(0)69 71 34 53 80
> Mobile: +49(0)172 6 74 95 77
> Fax: +49(0)69 71 34 95 380
> E-mail: matthias.bode at oppenheim.de
> Internet: http://www.oppenheim.de
> 
> 
> 
> -----Urspr&#30473;ngliche Nachricht-----
> Von: Duanxiang Xu [mailto:duanxiangxu at yahoo.com]
> Gesendet: Dienstag, 6. Mai 2003 12:04
> An: mathgroup at smc.vnet.net
> Betreff: [mg41176] about real part
> 
> 
> Hi, all
> 
> I have problem when I was trying to get the real
> part
> of a complex expression,
> like 
> Re[(Iwt+(L+1)LtD)^1/2]
> here w,L,D are real paramaters and t is real
> variable
> Mathematica seems could do nothing about this
> 
> Anyone could help me?
> 
> Thanks,
> Duanxiang
> 
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