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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 | #ifndef MLAPI_EIG_H
#define MLAPI_EIG_H
/*!
\file MLAPI_Eig.h
\brief MLAPI interfaces to eigensolvers.
\author Marzio Sala, D-INFK/ETHZ.
\date Last updated on Mar-06.
*/
/* ******************************************************************** */
/* See the file COPYRIGHT for a complete copyright notice, contact */
/* person and disclaimer. */
/* ******************************************************************** */
#include "ml_common.h"
namespace MLAPI {
class Operator;
class MultiVector;
//! Computes the maximum eigenvalue of \c Op using the A-norm of the operator.
double MaxEigAnorm(const Operator& Op, const bool DiagonalScaling = false);
//! Computes the maximum eigenvalue of \c Op using the CG method.
double MaxEigCG(const Operator& Op, const bool DiagonalScaling = false);
//! Computes the maximum eigenvalue of \c Op using the power method.
double MaxEigPowerMethod(const Operator& Op, const bool DiagonalScaling = false);
//! Computes the maximum eigenvalue of \c Op using Anasazi
double MaxEigAnasazi(const Operator& Op, const bool DiagonalScaling = false);
//! Computes eigenvalues and eigenvectors using LAPACK (w/ one process only).
void Eig(const Operator& Op, MultiVector& ER, MultiVector& EI);
void Eigs(const Operator& A, int NumEigenvalues,
MultiVector& ER, MultiVector& EI);
} // namespace MLAPI
#endif // MLAPI_EIG_H
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