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MathGroup Archive 1997

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Re: weird Log[0] *0 result

  • To: mathgroup at smc.vnet.net
  • Subject: [mg9076] Re: [mg9022] weird Log[0] *0 result
  • From: Olivier Gerard <jacquesg at pratique.fr>
  • Date: Thu, 9 Oct 1997 01:42:56 -0400
  • Sender: owner-wri-mathgroup at wolfram.com

Dear Patrick,

In my recent answer to you I forgot to give you an
example of a limit involving x Log[f(x)] for which
the result is not 0.

Here it is, presented with Mathematica :

In[1]:= Limit[ x^(1/x), x->0]
Out[1]= 0

In[2]:= Limit[ x Log[x^(1/x)], x->0]
Out[2]= -Infinity

Hope it helps,


Olivier


At 06:05 +0200 97.10.08, Patrick Tao wrote:
> 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




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