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/* specfunc/gsl_sf_gegenbauer.h
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*
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* Copyright (C) 1996, 1997, 1998, 1999, 2000 Gerard Jungman
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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/* Author: G. Jungman */
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#ifndef __GSL_SF_GEGENBAUER_H__
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#define __GSL_SF_GEGENBAUER_H__
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#include <gsl/gsl_sf_result.h>
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#undef __BEGIN_DECLS
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#undef __END_DECLS
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#ifdef __cplusplus
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# define __BEGIN_DECLS extern "C" {
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# define __END_DECLS }
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#else
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# define __BEGIN_DECLS /* empty */
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# define __END_DECLS /* empty */
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#endif
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__BEGIN_DECLS
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/* Evaluate Gegenbauer polynomials
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* using explicit representations.
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*
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* exceptions: none
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*/
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int gsl_sf_gegenpoly_1_e(double lambda, double x, gsl_sf_result * result);
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int gsl_sf_gegenpoly_2_e(double lambda, double x, gsl_sf_result * result);
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int gsl_sf_gegenpoly_3_e(double lambda, double x, gsl_sf_result * result);
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double gsl_sf_gegenpoly_1(double lambda, double x);
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double gsl_sf_gegenpoly_2(double lambda, double x);
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double gsl_sf_gegenpoly_3(double lambda, double x);
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/* Evaluate Gegenbauer polynomials.
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*
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* lambda > -1/2, n >= 0
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* exceptions: GSL_EDOM
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*/
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int gsl_sf_gegenpoly_n_e(int n, double lambda, double x, gsl_sf_result * result);
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double gsl_sf_gegenpoly_n(int n, double lambda, double x);
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/* Calculate array of Gegenbauer polynomials
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* for n = (0, 1, 2, ... nmax)
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*
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* lambda > -1/2, nmax >= 0
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* exceptions: GSL_EDOM
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*/
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int gsl_sf_gegenpoly_array(int nmax, double lambda, double x, double * result_array);
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__END_DECLS
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#endif /* __GSL_SF_GEGENBAUER_H__ */
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