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MathGroup Archive 2001

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Re: Limit question

  • To: mathgroup at smc.vnet.net
  • Subject: [mg31487] Re: Limit question
  • From: Erk Jensen <Erk.Jensen at cern.ch>
  • Date: Thu, 8 Nov 2001 04:54:24 -0500 (EST)
  • Organization: CERN http://www.cern.ch
  • References: <9sb3a8$3nl$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Souvik Banerjee wrote:
> 
> Hello MathGroup,
> 
> Why does
> 
> Limit[Tan[x], x-> Pi/2] = -infinity ? (Mathematica 4.0, Windows NT)
> 
> Thanks,
> 
> -Souvik
> 
> ps: The Limits with Direction specified is correct though.

Why not? What's wrong with that? 
If you don't specify the direction, why should it assume that you want the limit
from the left?

Why is Limit[1/x,x->0] = infinity? Shouldn't that by your logic be -infinity?

Your solution obivously is to specify the direction!

Ciao
  -erk-


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