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/* specfunc/gsl_sf_expint.h
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*
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* Copyright (C) 2007 Brian Gough
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* Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001, 2002 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_EXPINT_H__
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#define __GSL_SF_EXPINT_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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/* E_1(x) := Re[ Integrate[ Exp[-xt]/t, {t,1,Infinity}] ]
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*
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* x != 0.0
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* exceptions: GSL_EDOM, GSL_EOVRFLW, GSL_EUNDRFLW
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*/
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int gsl_sf_expint_E1_e(const double x, gsl_sf_result * result);
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double gsl_sf_expint_E1(const double x);
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/* E_2(x) := Re[ Integrate[ Exp[-xt]/t^2, {t,1,Infinity}] ]
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*
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* x != 0.0
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* exceptions: GSL_EDOM, GSL_EOVRFLW, GSL_EUNDRFLW
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*/
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int gsl_sf_expint_E2_e(const double x, gsl_sf_result * result);
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double gsl_sf_expint_E2(const double x);
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/* E_n(x) := Re[ Integrate[ Exp[-xt]/t^n, {t,1,Infinity}] ]
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*
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* x != 0.0
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* exceptions: GSL_EDOM, GSL_EOVRFLW, GSL_EUNDRFLW
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*/
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int gsl_sf_expint_En_e(const int n, const double x, gsl_sf_result * result);
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double gsl_sf_expint_En(const int n, const double x);
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/* E_1_scaled(x) := exp(x) E_1(x)
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*
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* x != 0.0
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* exceptions: GSL_EDOM, GSL_EOVRFLW, GSL_EUNDRFLW
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*/
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int gsl_sf_expint_E1_scaled_e(const double x, gsl_sf_result * result);
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double gsl_sf_expint_E1_scaled(const double x);
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/* E_2_scaled(x) := exp(x) E_2(x)
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*
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* x != 0.0
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* exceptions: GSL_EDOM, GSL_EOVRFLW, GSL_EUNDRFLW
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*/
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int gsl_sf_expint_E2_scaled_e(const double x, gsl_sf_result * result);
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double gsl_sf_expint_E2_scaled(const double x);
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/* E_n_scaled(x) := exp(x) E_n(x)
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*
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* x != 0.0
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* exceptions: GSL_EDOM, GSL_EOVRFLW, GSL_EUNDRFLW
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*/
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int gsl_sf_expint_En_scaled_e(const int n, const double x, gsl_sf_result * result);
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double gsl_sf_expint_En_scaled(const int n, const double x);
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/* Ei(x) := - PV Integrate[ Exp[-t]/t, {t,-x,Infinity}]
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* := PV Integrate[ Exp[t]/t, {t,-Infinity,x}]
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*
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* x != 0.0
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* exceptions: GSL_EDOM, GSL_EOVRFLW, GSL_EUNDRFLW
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*/
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int gsl_sf_expint_Ei_e(const double x, gsl_sf_result * result);
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double gsl_sf_expint_Ei(const double x);
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/* Ei_scaled(x) := exp(-x) Ei(x)
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*
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* x != 0.0
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* exceptions: GSL_EDOM, GSL_EOVRFLW, GSL_EUNDRFLW
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*/
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int gsl_sf_expint_Ei_scaled_e(const double x, gsl_sf_result * result);
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double gsl_sf_expint_Ei_scaled(const double x);
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/* Shi(x) := Integrate[ Sinh[t]/t, {t,0,x}]
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*
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* exceptions: GSL_EOVRFLW, GSL_EUNDRFLW
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*/
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int gsl_sf_Shi_e(const double x, gsl_sf_result * result);
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double gsl_sf_Shi(const double x);
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/* Chi(x) := Re[ M_EULER + log(x) + Integrate[(Cosh[t]-1)/t, {t,0,x}] ]
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*
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* x != 0.0
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* exceptions: GSL_EDOM, GSL_EOVRFLW, GSL_EUNDRFLW
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*/
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int gsl_sf_Chi_e(const double x, gsl_sf_result * result);
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double gsl_sf_Chi(const double x);
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/* Ei_3(x) := Integral[ Exp[-t^3], {t,0,x}]
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*
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* x >= 0.0
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* exceptions: GSL_EDOM
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*/
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int gsl_sf_expint_3_e(const double x, gsl_sf_result * result);
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double gsl_sf_expint_3(double x);
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/* Si(x) := Integrate[ Sin[t]/t, {t,0,x}]
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*
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* exceptions: none
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*/
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int gsl_sf_Si_e(const double x, gsl_sf_result * result);
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double gsl_sf_Si(const double x);
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/* Ci(x) := -Integrate[ Cos[t]/t, {t,x,Infinity}]
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*
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* x > 0.0
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* exceptions: GSL_EDOM
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*/
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int gsl_sf_Ci_e(const double x, gsl_sf_result * result);
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double gsl_sf_Ci(const double x);
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/* AtanInt(x) := Integral[ Arctan[t]/t, {t,0,x}]
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*
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*
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* exceptions:
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*/
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int gsl_sf_atanint_e(const double x, gsl_sf_result * result);
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double gsl_sf_atanint(const double x);
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__END_DECLS
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#endif /* __GSL_SF_EXPINT_H__ */
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