Services & Resources / Wolfram Forums
-----
 /
MathGroup Archive
1997
*January
*February
*March
*April
*May
*June
*July
*August
*September
*October
*November
*Archive Index
*Ask about this page
*Print this page
*Give us feedback
*Sign up for the Wolfram Insider

MathGroup Archive 1997

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: wierd Log[0] *0 result

  • To: mathgroup at smc.vnet.net
  • Subject: [mg9055] Re: [mg9022] wierd Log[0] *0 result
  • From: jpk at max.mpae.gwdg.de
  • Date: Thu, 9 Oct 1997 01:42:34 -0400
  • Sender: owner-wri-mathgroup at wolfram.com

Hi Patrick,

my Mma 3.0.1 say

x*Log[x] /. x->0 

Indeterminate


thats because x*Log[x]== Log[x^x] and x^x /. x->0== 0^0  is indeterminate

but if You do

Limit[x*Log[x] , x->0] 

0

You get the desired result.

Hope that helps
Jens
 
> Hello mma users,
> 
> I have a quick question on the following computation:
> 
> the natural log of 0 times 0 writen Log[0]*0
> 
> 
> 
> Should that not be 0 ?
> 
> mma is returning an Indeterminate result
> 
> Can somebody please help me understand this computation.
> 
> 
> 
> Many Thanks
> 
> -patrick
> 


  • Prev by Date: Re: Vertical plot labels
  • Next by Date: Re: wierd Log[0] *0 result
  • Previous by thread: wierd Log[0] *0 result
  • Next by thread: Re: wierd Log[0] *0 result