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Re: Banded triadiagonal eigenvalues


dkjk at bigpond.net.au wrote:
> Hi,
> 
> I'm trying to solve a pair of coupled ODEs using the finite difference
> method.  As such I need to find eigenvalues/eigenvectors of banded
> tridiagonal matrices.
> 
> I don't trust the results I'm getting from Eigensystem.
> 
> Does mathematica have any dedicated algorithm for such matrices?
> 

Take a look at the Linear Algebra section in Advanced Topics in the 
documentation:

http://reference.wolfram.com/mathematica/tutorial/LinearAlgebraInMathematicaOverview.html


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