Re: Q: Abs[1+f*I] assuming f>0 and real
- To: mathgroup at smc.vnet.net
- Subject: [mg9327] Re: Q: Abs[1+f*I] assuming f>0 and real
- From: hans.steffani at e-technik.tu-chemnitz.de (Hans Steffani)
- Date: Sat, 1 Nov 1997 03:33:17 -0500
- Organization: University of Technology Chemnitz, FRG
- Sender: owner-wri-mathgroup at wolfram.com
grac at fly.cc.fer.hr (Josip Gracin) writes: >Hello! >How do I make Mathematica 3.0 simplify Abs[f*I] for f>0 to f? >I suppose this is a FAQ but I haven't been able to find the answer. The first step is ComplexExpand[ Abs[f I] ] which computes Sqrt[f^2] PowerExpand[ Sqrt[f^2] ] evaluates to f h.f.s. [cc,fup] -- Hans Friedrich Steffani Institut fuer Elektrische Maschinen und Antriebe, TU Chemnitz mailto:hans.steffani at e-technik.tu-chemnitz.de http://www.tu-chemnitz.de/~hfst/