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/* 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__ */
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