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MathGroup Archive 2001

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Re:symbolic calculations with complex numbers

  • To: mathgroup at smc.vnet.net
  • Subject: [mg31956] Re:symbolic calculations with complex numbers
  • From: "Robert Nowak" <robert.nowak at ims.co.at>
  • Date: Fri, 14 Dec 2001 04:21:19 -0500 (EST)
  • Sender: owner-wri-mathgroup at wolfram.com

usually this shoud be enough

In[40]:=
Abs[p + I q]//ComplexExpand
Out[40]=
Abs[p + I q]

but this time we need the following (who knows why ?)
In[41]:=
Abs[p+I q]//ComplexExpand[#,TargetFunctions->{Re,Im}]&

Out[41]=
Sqrt[p^2 + q^2]


---
Robert Nowak (robert.nowak at ims.co.at)
IMS Nanofabrication GmbH
A-1020 Wien, Schreygasse 3, Austria
Phone: (+43 1)2144894-32, Fax: (+43 1)2144894-99





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