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MathGroup Archive 1997

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Re: wierd Log[0] *0 result

  • To: mathgroup at smc.vnet.net
  • Subject: [mg9077] Re: [mg9022] wierd Log[0] *0 result
  • From: seanross at worldnet.att.net
  • Date: Thu, 9 Oct 1997 01:42:57 -0400
  • Sender: owner-wri-mathgroup at wolfram.com

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

Log[0]=-Infinity

Infinity * 0 is one of the seven standard indeterminate forms along
with:

0/0, Infinity/Infinity, 1^Infinity,  Infinity-Infinity, Infinity^0,
zero^zero.

I recommend a good pre-calc text as a brush up on limits.


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