Re: information on Eigensystem
- To: mathgroup at smc.vnet.net
- Subject: [mg33587] Re: information on Eigensystem
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Tue, 2 Apr 2002 03:36:37 -0500 (EST)
- Organization: Universitaet Leipzig
- References: <a890u0$nto$1@smc.vnet.net>
- Reply-to: kuska at informatik.uni-leipzig.de
- Sender: owner-wri-mathgroup at wolfram.com
Hi, the Numerical Recipes use the EISPACK code and one can't do better than to use EISPACK or the original ALGOL source for Wilinson/Reinsch. Regards Jens Borut L wrote: > > Hello, > > I am doing a comparison between three methods for finding an eigensystem of > a matrix, Numerical Recipes tqli + tred2, jacobi, and Mathematica's > Eigensystem[]. > > I would like to acquire info on which algorithm does Mathematica have for > finding it out? What does she do in a case of a real symmetric matrix? I am > asking it because I haven't found anything in the implementation notes. > > Thank you for you time, > > Borut from Slovenia