- To: mathgroup at smc.vnet.net
- Subject: [mg5338] Re: [mg5302] ComplexExpand
- From: Daniel Lichtblau <danl>
- Date: Wed, 27 Nov 1996 01:47:52 -0500
- Organization: wolfram.com
- Sender: owner-wri-mathgroup at wolfram.com
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 1988-93 Wolfram Research, Inc.
> -- Terminal graphics initialized --
> In:= ComplexExpand[Log[1 / E^x]]
> Out= -x
> In:= ComplexExpand[Log[1 / (2 E^x)]]
> Out= Log[----]
> 2 E
> E. Neely Atkinson
> neely at 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:= ComplexExpand[Log[1 / (2 E^x)]]
Out= -x - Log
Out= Linux 3.0 (October 4, 1996)
danl at wolfram.com
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