Re: How do I force Log[Exp[x]]=x
- To: mathgroup at smc.vnet.net
- Subject: [mg22035] Re: How do I force Log[Exp[x]]=x
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Fri, 11 Feb 2000 02:38:16 -0500 (EST)
- Organization: Universitaet Leipzig
- References: <87tp95$5ia@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Hi, there are so many ways Log[Exp[x]] // PowerExpand Simplify[Log[Exp[x]], Element[x, Reals]] FullSimplify[Log[Exp[x]], Element[x, Reals]] Regards Jens Bart Killam wrote: > > For real x, Log[Exp[x]]=x. For general complex x > Mathematical leaves this expression unevaluated. I > have tried Log[Exp[x/;Im[x]=0]], but this give a result > of 0. > > How do I tell Mathematica that I want the expression > simplied for real x ? Thanks for any help.