/* specfunc/gsl_sf_coupling.h

 * 

 * Copyright (C) 1996,1997,1998,1999,2000,2001,2002 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_COUPLING_H__

#define __GSL_SF_COUPLING_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

/* 3j Symbols:  / ja jb jc \

 *              \ ma mb mc /

 *

 * exceptions: GSL_EDOM, GSL_EOVRFLW

 */

int gsl_sf_coupling_3j_e(int two_ja, int two_jb, int two_jc,

                            int two_ma, int two_mb, int two_mc,

                            gsl_sf_result * result

                            );

double gsl_sf_coupling_3j(int two_ja, int two_jb, int two_jc,

                          int two_ma, int two_mb, int two_mc

                          );

/* 6j Symbols:  / ja jb jc \

 *              \ jd je jf /

 *

 * exceptions: GSL_EDOM, GSL_EOVRFLW

 */

int gsl_sf_coupling_6j_e(int two_ja, int two_jb, int two_jc,

                         int two_jd, int two_je, int two_jf,

                         gsl_sf_result * result

                         );

double gsl_sf_coupling_6j(int two_ja, int two_jb, int two_jc,

                          int two_jd, int two_je, int two_jf

                          );

/* Racah W coefficients:

 *

 *   W(a b c d; e f) = (-1)^{a+b+c+d} / a b e \

 *                                    \ d c f /

 *

 * exceptions: GSL_EDOM, GSL_EOVRFLW

 */

int gsl_sf_coupling_RacahW_e(int two_ja, int two_jb, int two_jc,

                             int two_jd, int two_je, int two_jf,

                             gsl_sf_result * result

                             );

double gsl_sf_coupling_RacahW(int two_ja, int two_jb, int two_jc,

                              int two_jd, int two_je, int two_jf

                              );

/* 9j Symbols:  / ja jb jc \

 *              | jd je jf |

 *              \ jg jh ji /

 *

 * exceptions: GSL_EDOM, GSL_EOVRFLW

 */

int gsl_sf_coupling_9j_e(int two_ja, int two_jb, int two_jc,

                         int two_jd, int two_je, int two_jf,

                         int two_jg, int two_jh, int two_ji,

                         gsl_sf_result * result

                         );

double gsl_sf_coupling_9j(int two_ja, int two_jb, int two_jc,

                          int two_jd, int two_je, int two_jf,

                          int two_jg, int two_jh, int two_ji

                          );

/* INCORRECT version of 6j Symbols:

 * This function actually calculates

 *              / ja jb je \

 *              \ jd jc jf /

 * It represents the original implementation,

 * which had the above permutation of the

 * arguments. This was wrong and confusing,

 * and I had to fix it. Sorry for the trouble.

 * [GJ] Tue Nov 26 12:53:39 MST 2002

 *

 * exceptions: GSL_EDOM, GSL_EOVRFLW

 */

#ifndef GSL_DISABLE_DEPRECATED

int gsl_sf_coupling_6j_INCORRECT_e(int two_ja, int two_jb, int two_jc,

                                   int two_jd, int two_je, int two_jf,

                                   gsl_sf_result * result

                                   );

double gsl_sf_coupling_6j_INCORRECT(int two_ja, int two_jb, int two_jc,

                                    int two_jd, int two_je, int two_jf

                                    );

#endif /* !GSL_DISABLE_DEPRECATED */

__END_DECLS

#endif /* __GSL_SF_COUPLING_H__ */