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diff --git a/gsl-1.9/specfunc/hyperg.h b/gsl-1.9/specfunc/hyperg.h
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+/* specfunc/hyperg.h
+ * 
+ * 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+/* Author:  G. Jungman */
+
+/* Miscellaneous implementations of use
+ * for evaluation of hypergeometric functions.
+ */
+#ifndef _HYPERG_H_
+#define _HYPERG_H_
+
+#include <gsl/gsl_sf_result.h>
+
+
+/* Direct implementation of 1F1 series.
+ */
+int
+gsl_sf_hyperg_1F1_series_e(const double a, const double b, const double x, gsl_sf_result * result);
+
+
+/* Implementation of the 1F1 related to the
+ * incomplete gamma function: 1F1(1,b,x), b >= 1.
+ */
+int
+gsl_sf_hyperg_1F1_1_e(double b, double x, gsl_sf_result * result);
+
+
+/* 1F1(1,b,x) for integer b >= 1
+ */
+int
+gsl_sf_hyperg_1F1_1_int_e(int b, double x, gsl_sf_result * result);
+
+
+/* Implementation of large b asymptotic.
+ * [Bateman v. I, 6.13.3 (18)]
+ * [Luke, The Special Functions and Their Approximations v. I, p. 129, 4.8 (4)]
+ *
+ * a^2 << b, |x|/|b| < 1 - delta
+ */
+int
+gsl_sf_hyperg_1F1_large_b_e(const double a, const double b, const double x, gsl_sf_result * result);
+
+
+/* Implementation of large b asymptotic.
+ *
+ * Assumes a > 0 is small, x > 0, and |x|<|b|.
+ */
+int
+gsl_sf_hyperg_U_large_b_e(const double a, const double b, const double x,
+                             gsl_sf_result * result,
+                             double * ln_multiplier
+                             );
+
+
+/* Implementation of 2F0 asymptotic series.
+ */
+int
+gsl_sf_hyperg_2F0_series_e(const double a, const double b, const double x, int n_trunc,
+                              gsl_sf_result * result);
+
+
+#endif /* !_HYPERG_H_ */