1 /* specfunc/gsl_sf_fermi_dirac.h
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 */
22 #ifndef __GSL_SF_FERMI_DIRAC_H__
23 #define __GSL_SF_FERMI_DIRAC_H__
25 #include <gsl/gsl_sf_result.h>
30 # define __BEGIN_DECLS extern "C" {
31 # define __END_DECLS }
33 # define __BEGIN_DECLS /* empty */
34 # define __END_DECLS /* empty */
40 /* Complete Fermi-Dirac Integrals:
42 * F_j(x) := 1/Gamma[j+1] Integral[ t^j /(Exp[t-x] + 1), {t,0,Infinity}]
45 * Incomplete Fermi-Dirac Integrals:
47 * F_j(x,b) := 1/Gamma[j+1] Integral[ t^j /(Exp[t-x] + 1), {t,b,Infinity}]
51 /* Complete integral F_{-1}(x) = e^x / (1 + e^x)
53 * exceptions: GSL_EUNDRFLW
55 int gsl_sf_fermi_dirac_m1_e(const double x, gsl_sf_result * result);
56 double gsl_sf_fermi_dirac_m1(const double x);
59 /* Complete integral F_0(x) = ln(1 + e^x)
61 * exceptions: GSL_EUNDRFLW
63 int gsl_sf_fermi_dirac_0_e(const double x, gsl_sf_result * result);
64 double gsl_sf_fermi_dirac_0(const double x);
67 /* Complete integral F_1(x)
69 * exceptions: GSL_EUNDRFLW, GSL_EOVRFLW
71 int gsl_sf_fermi_dirac_1_e(const double x, gsl_sf_result * result);
72 double gsl_sf_fermi_dirac_1(const double x);
75 /* Complete integral F_2(x)
77 * exceptions: GSL_EUNDRFLW, GSL_EOVRFLW
79 int gsl_sf_fermi_dirac_2_e(const double x, gsl_sf_result * result);
80 double gsl_sf_fermi_dirac_2(const double x);
83 /* Complete integral F_j(x)
86 * exceptions: GSL_EUNDRFLW, GSL_EOVRFLW
88 int gsl_sf_fermi_dirac_int_e(const int j, const double x, gsl_sf_result * result);
89 double gsl_sf_fermi_dirac_int(const int j, const double x);
92 /* Complete integral F_{-1/2}(x)
94 * exceptions: GSL_EUNDRFLW, GSL_EOVRFLW
96 int gsl_sf_fermi_dirac_mhalf_e(const double x, gsl_sf_result * result);
97 double gsl_sf_fermi_dirac_mhalf(const double x);
100 /* Complete integral F_{1/2}(x)
102 * exceptions: GSL_EUNDRFLW, GSL_EOVRFLW
104 int gsl_sf_fermi_dirac_half_e(const double x, gsl_sf_result * result);
105 double gsl_sf_fermi_dirac_half(const double x);
108 /* Complete integral F_{3/2}(x)
110 * exceptions: GSL_EUNDRFLW, GSL_EOVRFLW
112 int gsl_sf_fermi_dirac_3half_e(const double x, gsl_sf_result * result);
113 double gsl_sf_fermi_dirac_3half(const double x);
116 /* Incomplete integral F_0(x,b) = ln(1 + e^(b-x)) - (b-x)
118 * exceptions: GSL_EUNDRFLW, GSL_EDOM
120 int gsl_sf_fermi_dirac_inc_0_e(const double x, const double b, gsl_sf_result * result);
121 double gsl_sf_fermi_dirac_inc_0(const double x, const double b);
126 #endif /* __GSL_SF_FERMI_DIRAC_H__ */