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- /* specfunc/synchrotron.c
- *
- * Copyright (C) 1996, 1997, 1998, 1999, 2000 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 2 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., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
- /* Author: G. Jungman */
-
- #include <config.h>
- #include <gsl/gsl_math.h>
- #include <gsl/gsl_errno.h>
- #include <gsl/gsl_sf_exp.h>
- #include <gsl/gsl_sf_pow_int.h>
- #include <gsl/gsl_sf_synchrotron.h>
-
- #include "error.h"
-
- #include "chebyshev.h"
- #include "cheb_eval.c"
-
- static double synchrotron1_data[13] = {
- 30.364682982501076273,
- 17.079395277408394574,
- 4.560132133545072889,
- 0.549281246730419979,
- 0.372976075069301172e-01,
- 0.161362430201041242e-02,
- 0.481916772120371e-04,
- 0.10512425288938e-05,
- 0.174638504670e-07,
- 0.22815486544e-09,
- 0.240443082e-11,
- 0.2086588e-13,
- 0.15167e-15
- };
- static cheb_series synchrotron1_cs = {
- synchrotron1_data,
- 12,
- -1.0, 1.0,
- 9
- };
-
- static double synchrotron2_data[12] = {
- 0.4490721623532660844,
- 0.898353677994187218e-01,
- 0.81044573772151290e-02,
- 0.4261716991089162e-03,
- 0.147609631270746e-04,
- 0.3628633615300e-06,
- 0.66634807498e-08,
- 0.949077166e-10,
- 0.1079125e-11,
- 0.10022e-13,
- 0.77e-16,
- 0.5e-18
- };
- static cheb_series synchrotron2_cs = {
- synchrotron2_data,
- 11,
- -1.0, 1.0,
- 7
- };
-
- static double synchrotron1a_data[23] = {
- 2.1329305161355000985,
- 0.741352864954200240e-01,
- 0.86968099909964198e-02,
- 0.11703826248775692e-02,
- 0.1645105798619192e-03,
- 0.240201021420640e-04,
- 0.35827756389389e-05,
- 0.5447747626984e-06,
- 0.838802856196e-07,
- 0.13069882684e-07,
- 0.2053099071e-08,
- 0.325187537e-09,
- 0.517914041e-10,
- 0.83002988e-11,
- 0.13352728e-11,
- 0.2159150e-12,
- 0.349967e-13,
- 0.56994e-14,
- 0.9291e-15,
- 0.152e-15,
- 0.249e-16,
- 0.41e-17,
- 0.7e-18
- };
- static cheb_series synchrotron1a_cs = {
- synchrotron1a_data,
- 22,
- -1.0, 1.0,
- 11
- };
-
- static double synchrotron21_data[13] = {
- 38.617839923843085480,
- 23.037715594963734597,
- 5.3802499868335705968,
- 0.6156793806995710776,
- 0.406688004668895584e-01,
- 0.17296274552648414e-02,
- 0.51061258836577e-04,
- 0.110459595022e-05,
- 0.18235530206e-07,
- 0.2370769803e-09,
- 0.24887296e-11,
- 0.21529e-13,
- 0.156e-15
- };
- static cheb_series synchrotron21_cs = {
- synchrotron21_data,
- 12,
- -1.0, 1.0,
- 9
- };
-
- static double synchrotron22_data[13] = {
- 7.9063148270660804288,
- 3.1353463612853425684,
- 0.4854879477453714538,
- 0.394816675827237234e-01,
- 0.19661622334808802e-02,
- 0.659078932293042e-04,
- 0.15857561349856e-05,
- 0.286865301123e-07,
- 0.4041202360e-09,
- 0.45568444e-11,
- 0.420459e-13,
- 0.3232e-15,
- 0.21e-17
- };
- static cheb_series synchrotron22_cs = {
- synchrotron22_data,
- 12,
- -1.0, 1.0,
- 8
- };
-
- static double synchrotron2a_data[17] = {
- 2.020337094170713600,
- 0.10956237121807404e-01,
- 0.8542384730114676e-03,
- 0.723430242132822e-04,
- 0.63124427962699e-05,
- 0.5648193141174e-06,
- 0.512832480138e-07,
- 0.47196532914e-08,
- 0.4380744214e-09,
- 0.410268149e-10,
- 0.38623072e-11,
- 0.3661323e-12,
- 0.348023e-13,
- 0.33301e-14,
- 0.319e-15,
- 0.307e-16,
- 0.3e-17
- };
- static cheb_series synchrotron2a_cs = {
- synchrotron2a_data,
- 16,
- -1.0, 1.0,
- 8
- };
-
-
- /*-*-*-*-*-*-*-*-*-*-*-* Functions with Error Codes *-*-*-*-*-*-*-*-*-*-*-*/
-
- int gsl_sf_synchrotron_1_e(const double x, gsl_sf_result * result)
- {
- /* CHECK_POINTER(result) */
-
- if(x < 0.0) {
- DOMAIN_ERROR(result);
- }
- else if(x < 2.0*M_SQRT2 * GSL_SQRT_DBL_EPSILON) {
- result->val = 2.14952824153447863671 * pow(x, 1.0/3.0);
- result->err = GSL_DBL_EPSILON * result->val;
- return GSL_SUCCESS;
- }
- else if(x <= 4.0) {
- const double c0 = M_PI/M_SQRT3;
- const double px = pow(x,1.0/3.0);
- const double px11 = gsl_sf_pow_int(px,11);
- const double t = x*x/8.0 - 1.0;
- gsl_sf_result result_c1;
- gsl_sf_result result_c2;
- cheb_eval_e(&synchrotron1_cs, t, &result_c1);
- cheb_eval_e(&synchrotron2_cs, t, &result_c2);
- result->val = px * result_c1.val - px11 * result_c2.val - c0 * x;
- result->err = px * result_c1.err + px11 * result_c2.err + c0 * x * GSL_DBL_EPSILON;
- result->err += 2.0 * GSL_DBL_EPSILON * fabs(result->val);
- return GSL_SUCCESS;
- }
- else if(x < -8.0*GSL_LOG_DBL_MIN/7.0) {
- const double c0 = 0.2257913526447274323630976; /* log(sqrt(pi/2)) */
- const double t = (12.0 - x) / (x + 4.0);
- gsl_sf_result result_c1;
- cheb_eval_e(&synchrotron1a_cs, t, &result_c1);
- result->val = sqrt(x) * result_c1.val * exp(c0 - x);
- result->err = 2.0 * GSL_DBL_EPSILON * result->val * (fabs(c0-x)+1.0);
- return GSL_SUCCESS;
- }
- else {
- UNDERFLOW_ERROR(result);
- }
- }
-
-
- int gsl_sf_synchrotron_2_e(const double x, gsl_sf_result * result)
- {
- /* CHECK_POINTER(result) */
-
- if(x < 0.0) {
- DOMAIN_ERROR(result);
- }
- else if(x < 2.0*M_SQRT2*GSL_SQRT_DBL_EPSILON) {
- result->val = 1.07476412076723931836 * pow(x, 1.0/3.0);
- result->err = 2.0 * GSL_DBL_EPSILON * result->val;
- return GSL_SUCCESS;
- }
- else if(x <= 4.0) {
- const double px = pow(x, 1.0/3.0);
- const double px5 = gsl_sf_pow_int(px,5);
- const double t = x*x/8.0 - 1.0;
- gsl_sf_result cheb1;
- gsl_sf_result cheb2;
- cheb_eval_e(&synchrotron21_cs, t, &cheb1);
- cheb_eval_e(&synchrotron22_cs, t, &cheb2);
- result->val = px * cheb1.val - px5 * cheb2.val;
- result->err = px * cheb1.err + px5 * cheb2.err;
- result->err += 2.0 * GSL_DBL_EPSILON * fabs(result->val);
- return GSL_SUCCESS;
- }
- else if(x < -8.0*GSL_LOG_DBL_MIN/7.0) {
- const double c0 = 0.22579135264472743236; /* log(sqrt(pi/2)) */
- const double t = (10.0 - x) / (x + 2.0);
- gsl_sf_result cheb1;
- cheb_eval_e(&synchrotron2a_cs, t, &cheb1);
- result->val = sqrt(x) * exp(c0-x) * cheb1.val;
- result->err = GSL_DBL_EPSILON * result->val * (fabs(c0-x)+1.0);
- return GSL_SUCCESS;
- }
- else {
- UNDERFLOW_ERROR(result);
- }
- }
-
- /*-*-*-*-*-*-*-*-*-* Functions w/ Natural Prototypes *-*-*-*-*-*-*-*-*-*-*/
-
- #include "eval.h"
-
- double gsl_sf_synchrotron_1(const double x)
- {
- EVAL_RESULT(gsl_sf_synchrotron_1_e(x, &result));
- }
-
- double gsl_sf_synchrotron_2(const double x)
- {
- EVAL_RESULT(gsl_sf_synchrotron_2_e(x, &result));
- }
-