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/*
ARPACK++ v1.2 2/20/2000
c++ interface to ARPACK code.
MODULE BCMatrxC.h
Function template for the mass matrix formed by using piecewise
linear elements on [0, 1].
ARPACK Authors
Richard Lehoucq
Danny Sorensen
Chao Yang
Dept. of Computational & Applied Mathematics
Rice University
Houston, Texas
*/
#ifndef BCMATRXC_H
#define BCMATRXC_H
#include "arcomp.h"
template<class ARFLOAT, class ARINT>
void CompMatrixC(ARINT n, ARINT& nL, ARINT& nU, arcomplex<ARFLOAT>* &A)
{
ARINT i;
arcomplex<ARFLOAT> diag, sub;
// Defining constants.
sub = arcomplex<ARFLOAT>(1.0/(ARFLOAT)(n+1), 0.0);
diag = arcomplex<ARFLOAT>(4.0/(ARFLOAT)(n+1), 0.0);
// Defining the lower and upper bandwidth.
nL = 1;
nU = 1;
// Creating output vector A.
A = new arcomplex<ARFLOAT>[3*n];
for (i=1; i<(3*n); i+=3) {
if (i-1) A[i-1] = sub;
A[i] = diag;
if (n-i-1) A[i+1] = sub;
}
} // CompMatrixC.
#endif // BCMATRXC_H
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