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/*
ARPACK++ v1.2 2/20/2000
c++ interface to ARPACK code.
MODULE SGenPrbA.h
Very simple template class intended to illustrate how to
use ARPACK++ to find some few eigenvalues and eigenvectors
of symmetric generalized problems in regular mode.
ARPACK Authors
Richard Lehoucq
Danny Sorensen
Chao Yang
Dept. of Computational & Applied Mathematics
Rice University
Houston, Texas
*/
#ifndef SGENPRBA_H
#define SGENPRBA_H
#include "blas1c.h"
#include "smatrixc.h"
#include "smatrixd.h"
template <class ART>
struct SymGenProblemA {
SymMatrixC<ART> A;
SymMatrixD<ART> B;
void MultOPv(ART* v, ART* w)
// Matrix-vector multiplication w <- inv(B)*A*v.
{
A.MultMv(v, w);
copy(A.ncols(), w, 1, v, 1);
B.SolveM(w);
}
SymGenProblemA(int nx): A(nx), B(nx)
// Constructor.
{
B.FactorM();
}
}; // struct SymGenProblemA.
#endif // SGENPRBA_H
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