Re: Is this normal for Limit?
- To: mathgroup at smc.vnet.net
- Subject: [mg82270] Re: [mg82241] Is this normal for Limit?
- From: Andrzej Kozlowski <akoz at mimuw.edu.pl>
- Date: Wed, 17 Oct 2007 03:45:47 -0400 (EDT)
- References: <200710160723.DAA08676@smc.vnet.net>
On 16 Oct 2007, at 16:23, 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
>
>
$Assumptions is not working properly. I think this has already been
pointed out on this list a while ago.
Limit[E^((-k)*t), t -> Infinity,
Assumptions -> k > 0]
0
Andrzej Kozlowski
- References:
- Is this normal for Limit?
- From: Michael Mandelberg <mmandelberg@comcast.net>
- Is this normal for Limit?