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MathGroup Archive 2007

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Re: MathKernel Crash while calculating limit

  • To: mathgroup at smc.vnet.net
  • Subject: [mg75618] Re: MathKernel Crash while calculating limit
  • From: Peter Pein <petsie at dordos.net>
  • Date: Mon, 7 May 2007 05:25:30 -0400 (EDT)
  • References: <f1hla2$om6$1@smc.vnet.net>

Ulrik Günther schrieb:
> Hi everybody,
> 
> during a calculation of a limit, MathKernel crashed. I tried the  
> following:
> 
> Limit[((-2^(n - 1)*M)/(n!*L^(n - 1)))^(n/2), n -> (infinity)]
> 
> After some seconds, Mathematica produced a beep, then I got a crash  
> report concerning MathKernel. I attached a full crash log to this  
> mail. Oh, and I'm using Mathematica (for Students) 5.2 on a PowerBook  
> G4 running MacOS 10.4.9.
> Also tried calculating that limit without the constants L and M, this  
> time it worked.
> 
> Maybe somebody can explain that behaviour to me...
> 
> Thanks in advance,
> 
> ulrik
> 

Hi Ulrik,

has the variable infinity got any special value? Using Infinity instead leads
to no Problem in version 5.1:

In[1]:= $Version
Out[1]= "5.1 for Microsoft Windows (October 25, 2004)"
In[2]:= Limit[(-(2^(n - 1)*M)/(n!*L^(n - 1)))^(n/2), n -> Infinity,
  Assumptions -> M > 0 && L > 0]
Out[2]= 0

Peter


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