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/* linalg/tridiag.h
*
* Copyright (C) 1996, 1997, 1998, 1999, 2000, 2002 Gerard Jungman,
* Brian Gough, David Necas
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
/* Author: G. Jungman
*/
/* Low level tridiagonal solvers.
* Used internally in other areas of GSL.
*/
#ifndef __GSL_TRIDIAG_H__
#define __GSL_TRIDIAG_H__
#include <stdlib.h>
static
int solve_tridiag_nonsym(
const double diag[], size_t d_stride,
const double abovediag[], size_t a_stride,
const double belowdiag[], size_t b_stride,
const double rhs[], size_t r_stride,
double x[], size_t x_stride,
size_t N
);
static
int solve_tridiag(
const double diag[], size_t d_stride,
const double offdiag[], size_t o_stride,
const double b[], size_t b_stride,
double x[], size_t x_stride,
size_t N);
static
int solve_cyc_tridiag(
const double diag[], size_t d_stride,
const double offdiag[], size_t o_stride,
const double b[], size_t b_stride,
double x[], size_t x_stride,
size_t N
);
static
int solve_cyc_tridiag_nonsym(
const double diag[], size_t d_stride,
const double abovediag[], size_t a_stride,
const double belowdiag[], size_t b_stride,
const double rhs[], size_t r_stride,
double x[], size_t x_stride,
size_t N);
#endif /* __GSL_TRIDIAG_H__ */
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