3 * Copyright (C) 1996, 1997, 1998, 1999, 2000 Gerard Jungman
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 3 of the License, or (at
8 * your option) any later version.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
20 /* Author: G. Jungman */
25 #include <gsl/gsl_sf_result.h>
28 /* Taylor expansion for J_nu(x) or I_nu(x)
32 int gsl_sf_bessel_IJ_taylor_e(const double nu, const double x,
35 const double threshold,
36 gsl_sf_result * result
39 int gsl_sf_bessel_Jnu_asympx_e(const double nu, const double x, gsl_sf_result * result);
40 int gsl_sf_bessel_Ynu_asympx_e(const double nu, const double x, gsl_sf_result * result);
42 int gsl_sf_bessel_Inu_scaled_asympx_e(const double nu, const double x, gsl_sf_result * result);
43 int gsl_sf_bessel_Knu_scaled_asympx_e(const double nu, const double x, gsl_sf_result * result);
45 int gsl_sf_bessel_Inu_scaled_asymp_unif_e(const double nu, const double x, gsl_sf_result * result);
46 int gsl_sf_bessel_Knu_scaled_asymp_unif_e(const double nu, const double x, gsl_sf_result * result);
49 /* ratio = J_{nu+1}(x) / J_nu(x)
53 gsl_sf_bessel_J_CF1(const double nu, const double x, double * ratio, double * sgn);
56 /* ratio = I_{nu+1}(x) / I_nu(x)
59 gsl_sf_bessel_I_CF1_ser(const double nu, const double x, double * ratio);
62 /* Evaluate the Steed method continued fraction CF2 for
64 * (J' + i Y')/(J + i Y) := P + i Q
67 gsl_sf_bessel_JY_steed_CF2(const double nu, const double x,
68 double * P, double * Q);
72 gsl_sf_bessel_JY_mu_restricted(const double mu, const double x,
73 gsl_sf_result * Jmu, gsl_sf_result * Jmup1,
74 gsl_sf_result * Ymu, gsl_sf_result * Ymup1);
78 gsl_sf_bessel_K_scaled_steed_temme_CF2(const double nu, const double x,
79 double * K_nu, double * K_nup1,
83 /* These are of use in calculating the oscillating
88 int gsl_sf_bessel_cos_pi4_e(double y, double eps, gsl_sf_result * result);
89 int gsl_sf_bessel_sin_pi4_e(double y, double eps, gsl_sf_result * result);
92 #endif /* !_BESSEL_H_ */