1 files changed, 58 insertions, 0 deletions
diff --git a/gsl-1.9/multimin/convergence.c b/gsl-1.9/multimin/convergence.c
new file mode 100644
index 0000000..c468d3a
--- /dev/null
+++ b/gsl-1.9/multimin/convergence.c
@@ -0,0 +1,58 @@
+/* multimin/convergence.c
+ * 
+ * Copyright (C) 1996, 1997, 1998, 1999, 2000 Fabrice Rossi
+ * 
+ * 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.
+ */
+
+#include <config.h>
+#include <gsl/gsl_multimin.h>
+#include <gsl/gsl_blas.h>
+
+int
+gsl_multimin_test_gradient (const gsl_vector *g, double epsabs)
+{
+  double norm;
+
+  if (epsabs < 0.0)
+    {
+      GSL_ERROR ("absolute tolerance is negative", GSL_EBADTOL);
+    }
+
+  norm = gsl_blas_dnrm2(g);
+  
+  if (norm < epsabs)
+    {
+      return GSL_SUCCESS;
+    }
+
+  return GSL_CONTINUE;
+}
+
+int
+gsl_multimin_test_size (const double size, double epsabs)
+{
+  if (epsabs < 0.0)
+    {
+      GSL_ERROR ("absolute tolerance is negative", GSL_EBADTOL);
+    }
+  
+  if (size < epsabs)
+    {
+      return GSL_SUCCESS;
+    }
+
+  return GSL_CONTINUE;
+}