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MathGroup Archive 2002

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List, FindRoot, Bessel

  • To: mathgroup at smc.vnet.net
  • Subject: [mg33628] List, FindRoot, Bessel
  • From: "Riadh Alimi" <alimir3 at cti.ecp.fr>
  • Date: Wed, 3 Apr 2002 18:09:04 -0500 (EST)
  • Organization: Ecole Centrale Paris : Grde Voie des Vignes, 92295 Chatenay-Malabry Cdx
  • Sender: owner-wri-mathgroup at wolfram.com

Hi !

I'm trying to find the first n roots of an equation involving Bessel
Functions and to create a List of them.

The best thing I find so far is :
n = 10;
For[i = 0, i < n,
  Print[FindRoot[- k BesselJ[1, k] + 30 BesselJ[0, k] == 0, {k,
        2.32 + i Pi}]];
  i++]

And the result I get is :

{k->3.2}
{k->5.2}
{k->8.3}
....

Does anyone know what {k->3.2} means ? And how I could get only the value
3.2 instead of {k->3.2} in order to create a list?

Thank you




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