Re: Re[a + I b] = a
- To: mathgroup@smc.vnet.net
- Subject: [mg10586] Re: Re[a + I b] = a
- From: hans.steffani@e-technik.tu-chemnitz.de (Hans Steffani)
- Date: Mon, 26 Jan 1998 04:42:20 -0500
- Organization: University of Technology Chemnitz, FRG
- References: <6a1j4c$pbp@smc.vnet.net>
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/