|
Packit |
67cb25 |
/* specfunc/gsl_sf_lambert.h
|
|
Packit |
67cb25 |
*
|
|
Packit |
67cb25 |
* Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001 Gerard Jungman
|
|
Packit |
67cb25 |
*
|
|
Packit |
67cb25 |
* This program is free software; you can redistribute it and/or modify
|
|
Packit |
67cb25 |
* it under the terms of the GNU General Public License as published by
|
|
Packit |
67cb25 |
* the Free Software Foundation; either version 3 of the License, or (at
|
|
Packit |
67cb25 |
* your option) any later version.
|
|
Packit |
67cb25 |
*
|
|
Packit |
67cb25 |
* This program is distributed in the hope that it will be useful, but
|
|
Packit |
67cb25 |
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
Packit |
67cb25 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Packit |
67cb25 |
* General Public License for more details.
|
|
Packit |
67cb25 |
*
|
|
Packit |
67cb25 |
* You should have received a copy of the GNU General Public License
|
|
Packit |
67cb25 |
* along with this program; if not, write to the Free Software
|
|
Packit |
67cb25 |
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
|
|
Packit |
67cb25 |
*/
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
/* Author: G. Jungman */
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
#ifndef __GSL_SF_LAMBERT_H__
|
|
Packit |
67cb25 |
#define __GSL_SF_LAMBERT_H__
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
#include <gsl/gsl_sf_result.h>
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
#undef __BEGIN_DECLS
|
|
Packit |
67cb25 |
#undef __END_DECLS
|
|
Packit |
67cb25 |
#ifdef __cplusplus
|
|
Packit |
67cb25 |
# define __BEGIN_DECLS extern "C" {
|
|
Packit |
67cb25 |
# define __END_DECLS }
|
|
Packit |
67cb25 |
#else
|
|
Packit |
67cb25 |
# define __BEGIN_DECLS /* empty */
|
|
Packit |
67cb25 |
# define __END_DECLS /* empty */
|
|
Packit |
67cb25 |
#endif
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
__BEGIN_DECLS
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
/* Lambert's Function W_0(x)
|
|
Packit |
67cb25 |
*
|
|
Packit |
67cb25 |
* W_0(x) is the principal branch of the
|
|
Packit |
67cb25 |
* implicit function defined by W e^W = x.
|
|
Packit |
67cb25 |
*
|
|
Packit |
67cb25 |
* -1/E < x < \infty
|
|
Packit |
67cb25 |
*
|
|
Packit |
67cb25 |
* exceptions: GSL_EMAXITER;
|
|
Packit |
67cb25 |
*/
|
|
Packit |
67cb25 |
int gsl_sf_lambert_W0_e(double x, gsl_sf_result * result);
|
|
Packit |
67cb25 |
double gsl_sf_lambert_W0(double x);
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
/* Lambert's Function W_{-1}(x)
|
|
Packit |
67cb25 |
*
|
|
Packit |
67cb25 |
* W_{-1}(x) is the second real branch of the
|
|
Packit |
67cb25 |
* implicit function defined by W e^W = x.
|
|
Packit |
67cb25 |
* It agrees with W_0(x) when x >= 0.
|
|
Packit |
67cb25 |
*
|
|
Packit |
67cb25 |
* -1/E < x < \infty
|
|
Packit |
67cb25 |
*
|
|
Packit |
67cb25 |
* exceptions: GSL_MAXITER;
|
|
Packit |
67cb25 |
*/
|
|
Packit |
67cb25 |
int gsl_sf_lambert_Wm1_e(double x, gsl_sf_result * result);
|
|
Packit |
67cb25 |
double gsl_sf_lambert_Wm1(double x);
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
__END_DECLS
|
|
Packit |
67cb25 |
|
|
Packit |
67cb25 |
#endif /* __GSL_SF_LAMBERT_H__ */
|