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Re: [mg5302] ComplexExpand
Posted:
Nov 26, 1996 3:40 AM


E. Neely Atkinson wrote: > > Can anyone explain to me why the following two > examples behave differently? Thanks. > > Mathematica 2.2 for IBM RISC System/6000 > Copyright 198893 Wolfram Research, Inc. >  Terminal graphics initialized  > > In[1]:= ComplexExpand[Log[1 / E^x]] > > Out[1]= x > > In[2]:= ComplexExpand[Log[1 / (2 E^x)]] > > 1 > Out[2]= Log[] > x > 2 E > > > > E. Neely Atkinson > neely@biomath.mdacc.tmc.edu
Looks like a minor bug. The result is tolerable because it is separated into explicitly real and imaginary parts. The latter just happens to be zero, because x is assumed real.
Works better in version 3.0.
In[2]:= ComplexExpand[Log[1 / (2 E^x)]] Out[2]= x  Log[2]
In[3]:= $Version Out[3]= Linux 3.0 (October 4, 1996)
Daniel Lichtblau Wolfram Research danl@wolfram.com



