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MathGroup Archive 2005

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Re: Problem with evaluation of Besel Functions

  • To: mathgroup at smc.vnet.net
  • Subject: [mg56044] Re: Problem with evaluation of Besel Functions
  • From: Peter Pein <petsie at arcor.de>
  • Date: Thu, 14 Apr 2005 08:54:43 -0400 (EDT)
  • References: <d3g8kd$smh$1@smc.vnet.net> <d3iagd$9l8$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

dh wrote:
...
> But here seems to lurck some nice pitfall:
> Limit[BesselJ[1.5,y],y->0] gives Infinity.
> Limit seems to have large problems with approximate Numbers. Can anybody 
> comment on this??
> 
> Sincerely, Daniel
> 
> 
Increasing the precision slightly helps:

In[1]:=
Limit[BesselJ[SetPrecision[1.5,$MachinePrecision+1],y],y->0]
Out[1]=
0
-- 
Peter Pein
Berlin


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