1 files changed, 69 insertions, 0 deletions
diff --git a/thirdparty/includes/GSL/gsl/gsl_sf_lambert.h b/thirdparty/includes/GSL/gsl/gsl_sf_lambert.h
new file mode 100644
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--- /dev/null
+++ b/thirdparty/includes/GSL/gsl/gsl_sf_lambert.h
@@ -0,0 +1,69 @@
+/* specfunc/gsl_sf_lambert.h
+ * 
+ * Copyright (C) 1996, 1997, 1998, 1999, 2000, 2001 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 3 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 */
+
+#ifndef __GSL_SF_LAMBERT_H__
+#define __GSL_SF_LAMBERT_H__
+
+#include <gsl/gsl_sf_result.h>
+
+#undef __BEGIN_DECLS
+#undef __END_DECLS
+#ifdef __cplusplus
+# define __BEGIN_DECLS extern "C" {
+# define __END_DECLS }
+#else
+# define __BEGIN_DECLS /* empty */
+# define __END_DECLS /* empty */
+#endif
+
+__BEGIN_DECLS
+
+
+/* Lambert's Function W_0(x)
+ *
+ * W_0(x) is the principal branch of the
+ * implicit function defined by W e^W = x.
+ *
+ * -1/E < x < \infty
+ *
+ * exceptions: GSL_EMAXITER;
+ */
+int     gsl_sf_lambert_W0_e(double x, gsl_sf_result * result);
+double  gsl_sf_lambert_W0(double x);
+
+
+/* Lambert's Function W_{-1}(x)
+ *
+ * W_{-1}(x) is the second real branch of the
+ * implicit function defined by W e^W = x.
+ * It agrees with W_0(x) when x >= 0.
+ *
+ * -1/E < x < \infty
+ *
+ * exceptions: GSL_MAXITER;
+ */
+int     gsl_sf_lambert_Wm1_e(double x, gsl_sf_result * result);
+double  gsl_sf_lambert_Wm1(double x);
+
+
+__END_DECLS
+
+#endif /* __GSL_SF_LAMBERT_H__ */