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MathGroup Archive 1999

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RE: Can't get the 3rd Bessel zero!

  • To: mathgroup at smc.vnet.net
  • Subject: [mg19854] RE: [mg19799] Can't get the 3rd Bessel zero!
  • From: Wong William <WWong at submarinesystems.com>
  • Date: Sun, 19 Sep 1999 01:20:38 -0400
  • Sender: owner-wri-mathgroup at wolfram.com

BesselZeros works for me --- Mathematica v 4.0 & NT 4.0 SP5 :)

William S. Wong, Ph.D.
Tyco Submarine Systems Laboratories 

Room 1A-212
250 Industrial Way West
Eatontown, NJ 07724

Phone:  (732) 578-7531
Fax:    (732) 578-7702
wwong at submarinesystems.com

================================================
In[1]:=
<< NumericalMath`BesselZeros`

In[2]:=
BesselJZeros[0, 2]

Out[2]=
{2.40483, 5.52008}

In[3]:=
BesselJZeros[0, 3]

Out[3]=
{2.40483, 5.52008, 8.65373}

> -----Original Message-----
> From: iioannou at u.washington.edu [mailto:iioannou at u.washington.edu]
To: mathgroup at smc.vnet.net
> Sent: Friday, September 17, 1999 1:37 AM
> To: mathgroup at smc.vnet.net
> Subject: [mg19854] [mg19799] Can't get the 3rd Bessel zero!
> 
> 
> Hi all,
> 
> I've been working with BesselJZeros recently, and the code I 
> wrote shows
> the following peculiar behavior. While I can get all the 
> Bessel zeros I
> need for most of the functions, I get mathematica to hang up 
> at the 3rd
> Bessel zero of the 0th order Bessel.
> 
> So, BesselJZeros[0,2] works, BesselJZeros[1,5] works, but
> BesselJZeros[0,3] doesn't work. (waited for a couple of hours before I
> aborted the calculation) Does anybody know what this behavior 
> is due to?
> Is it a bug? Has it been seen before and by anybody else? Or is it
> particular to my machine?
> 
> Thanks, John
> -- 
>       Ioannis   I    Ioannou                   phone: (206)-543-1372
>       g-2 group, Atomic Physics                fax:   (206)-685-0635
>       Department of Physics           
>       University of Washington        e-mail: 
> iioannou at u.washington.edu
> 


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