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MathGroup Archive 2000

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How do I force Log[Exp[x]]=x

  • To: mathgroup at smc.vnet.net
  • Subject: [mg21988] How do I force Log[Exp[x]]=x
  • From: sasrbk at unx.sas.com (Bart Killam)
  • Date: Thu, 10 Feb 2000 02:25:32 -0500 (EST)
  • Organization: SAS Institute
  • Sender: owner-wri-mathgroup at wolfram.com

  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.
-- 
Bart Killam                            Work:  919-677-8000 x7538
SAS Institute Inc.                     Fax:   919-677-8123
SAS Campus Dr., R5115                  Email: sasrbk at unx.sas.com
Cary NC 27513-8000   


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