RE: Finding multiple roots
- To: mathgroup at smc.vnet.net
- Subject: [mg38283] RE: [mg38225] Finding multiple roots
- From: "David Park" <djmp at earthlink.net>
- Date: Tue, 10 Dec 2002 04:17:49 -0500 (EST)
- Sender: owner-wri-mathgroup at wolfram.com
Novak, You might want to try the RootSearch package by Ted Ersek available on MathSource. It is quite robust, and will find all the roots in a given interval. I'm not certain at the moment if it gives them in order, but it probably does. In any case you could always sort them. David Park djmp at earthlink.net http://home.earthlink.net/~djmp/ From: Novak Petrovic [mailto:novak at itee.uq.edu.au] To: mathgroup at smc.vnet.net Hi all, I'm trying to find roots of the characteristic equation of a dielectric-loaded waveguide. There are multiple roots of the equation and I use FindRoot to find them. The sequence of roots is very important in my further calculations. Is there a routine or a clever way to (numerically) find all the roots of an equation in a predefined values? As it is now I have to look for each individual root manually and it gets a bit tedious as the number of required modes increases. Thanks a lot. -- Regards, Novak Petrovic novak at itee.uq.edu.au