Services & Resources / Wolfram Forums
-----
 /
MathGroup Archive
1998
*January
*February
*March
*April
*May
*June
*July
*August
*September
*October
*November
*December
*Archive Index
*Ask about this page
*Print this page
*Give us feedback
*Sign up for the Wolfram Insider

MathGroup Archive 1998

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: Re[a + I b] = a



Markus.Hetzenecker@uibk.ac.at (Markus Hetzenecker) writes:

>hallo
>how can I tell mathematica that the variable a and b is real, so that
>Re[a+ I  b] results to a?

This is only correct if a and b are real. Try Re[a + I b] //
ComplexExpand

Hans Friedrich Steffani
[CC,FUP]
--
Hans Friedrich Steffani
Institut fuer Elektrische Maschinen und Antriebe, TU Chemnitz
mailto:hans.steffani@e-technik.tu-chemnitz.de
http://www.tu-chemnitz.de/~hfst/



  • Prev by Date: Re: ParametricPlot3D Question
  • Next by Date: Re: I don't understand in Mathematic
  • Prev by thread: RE: Re[a + I b] = a
  • Next by thread: Re: Re[a + I b] = a