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Re: Is this normal for Limit?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg82291] Re: Is this normal for Limit?
  • From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
  • Date: Wed, 17 Oct 2007 03:56:33 -0400 (EDT)
  • References: <ff1par$8nq$1@smc.vnet.net>

Hi,

Assuming[{Element[k, Reals] && k > 0},
  Limit[\[ExponentialE]^(-k t), t -> \[Infinity]]
  ]
??

Regards
   Jens


Michael Mandelberg wrote:
> I have what I would think is the following simple limit to evaluate:
> 
> $Pre = Refine[#] &;
> $Assumptions = {t \[Element] Reals, k \[Element] Reals,  k > 0};
> 
> In[3]:= Limit[Exp[-k t], t -> Infinity]
> 
> The results is:
> 
> Out[3]= Limit[\[ExponentialE]^(-k t), t -> \[Infinity]]
> 
> In other words Mathematica 6.0.0 punts on this.  Is there any sense in
> which this limit is not well-defined?
> 
> Michael Mandelberg
> 
> 


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