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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: [mg19871] Re: [mg19799] Can't get the 3rd Bessel zero!
  • From: BobHanlon at aol.com
  • Date: Sun, 19 Sep 1999 01:20:53 -0400
  • Sender: owner-wri-mathgroup at wolfram.com

John,

Works on my Mac.

$Version

"4.0 for Power Macintosh (April 20, 1999)"

Needs["NumericalMath`BesselZeros`"]

BesselJZeros[0, 3]

{2.40483, 5.52008, 8.65373}

Plot[BesselJ[0, x], {x, 0, 9}];

Bob Hanlon

In a message dated 9/17/1999 11:14:21 AM, iioannou at u.washington.edu writes:

>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?
>


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