/* specfunc/gsl_sf_laguerre.h

 * 

 * Copyright (C) 1996, 1997, 1998, 1999, 2000 Gerard Jungman

 * 

 * 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 3 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 */

#ifndef __GSL_SF_LAGUERRE_H__

#define __GSL_SF_LAGUERRE_H__

#include <gsl/gsl_sf_result.h>

#undef __BEGIN_DECLS

#undef __END_DECLS

#ifdef __cplusplus

# define __BEGIN_DECLS extern "C" {

# define __END_DECLS }

#else

# define __BEGIN_DECLS /* empty */

# define __END_DECLS /* empty */

#endif

__BEGIN_DECLS

/* L^a_n(x) = (a+1)_n / n! 1F1(-n,a+1,x) */

/* Evaluate generalized Laguerre polynomials

 * using explicit representations.

 *

 * exceptions: none

 */

int gsl_sf_laguerre_1_e(const double a, const double x, gsl_sf_result * result);

int gsl_sf_laguerre_2_e(const double a, const double x, gsl_sf_result * result);

int gsl_sf_laguerre_3_e(const double a, const double x, gsl_sf_result * result);

double gsl_sf_laguerre_1(double a, double x);

double gsl_sf_laguerre_2(double a, double x);

double gsl_sf_laguerre_3(double a, double x);

/* Evaluate generalized Laguerre polynomials.

 *

 * a > -1.0

 * n >= 0

 * exceptions: GSL_EDOM

 */

int     gsl_sf_laguerre_n_e(const int n, const double a, const double x, gsl_sf_result * result);

double     gsl_sf_laguerre_n(int n, double a, double x);

__END_DECLS

#endif /* __GSL_SF_LAGUERRE_H__ */