e3a610506b
git-svn-id: svn://scm.gforge.inria.fr/svnroot/paradiseo@2710 331e1502-861f-0410-8da2-ba01fb791d7f
25 lines
615 B
C++
25 lines
615 B
C++
#ifndef EIG_H__
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#define EIG_H__
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#include <matrices.h>
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#include <valarray>
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namespace eo {
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/* ========================================================= */
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/*
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Calculating eigenvalues and vectors.
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Input:
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N: dimension.
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C: lower_triangular NxN-matrix.
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niter: number of maximal iterations for QL-Algorithm.
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Output:
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diag: N eigenvalues.
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Q: Columns are normalized eigenvectors.
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return: number of iterations in QL-Algorithm.
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*/
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extern int eig( int N, const lower_triangular_matrix& C, std::valarray<double>& diag, square_matrix& Q,
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int niter = 0);
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} // namespace eo
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#endif
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