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MathGroup Archive 2006

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Re: Limit Question

  • To: mathgroup at smc.vnet.net
  • Subject: [mg66464] Re: [mg66452] Limit Question
  • From: gardyloo <gardyloo at mail.wsu.edu>
  • Date: Sun, 14 May 2006 02:57:55 -0400 (EDT)
  • References: <200605130642.CAA08939@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

I've never really liked Mathematica's handling of which functions may be 
passed assumptions, or may be used (effectively) in Assuming...

Assuming[a > 0, Limit[Exp[(-a)*t], t -> Infinity]]

0

Similarly,

Assuming[a < 0, Limit[Exp[(a)*t], t -> Infinity]]

0


I can't really answer the question, but I can offer those alternatives 
to get the assumed limit.
 
       Cheers,
          C.O.


Blimbaum, Jerry CIV NSWC PC wrote:
> Why do these give no output?
>
> Simplify[Limit[Exp[-a t],t->Infinity],a>0]
>
> and  same for
>
> Simplify[Limit[Exp[a t],t->Infinity],a<0]
>
> thanks...
>
> Jerry Blimbaum 
>
>
>
>
>   


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Curtis Osterhoudt
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  • References:
    • Limit Question
      • From: "Blimbaum, Jerry CIV NSWC PC" <jerry.blimbaum@navy.mil>
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