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.