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diff --git a/extern/quadriflow/3rd/lemon-1.3.1/lemon/base.cc b/extern/quadriflow/3rd/lemon-1.3.1/lemon/base.cc
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+/* -*- mode: C++; indent-tabs-mode: nil; -*-
+ *
+ * This file is a part of LEMON, a generic C++ optimization library.
+ *
+ * Copyright (C) 2003-2013
+ * Egervary Jeno Kombinatorikus Optimalizalasi Kutatocsoport
+ * (Egervary Research Group on Combinatorial Optimization, EGRES).
+ *
+ * Permission to use, modify and distribute this software is granted
+ * provided that this copyright notice appears in all copies. For
+ * precise terms see the accompanying LICENSE file.
+ *
+ * This software is provided "AS IS" with no warranty of any kind,
+ * express or implied, and with no claim as to its suitability for any
+ * purpose.
+ *
+ */
+
+///\file
+///\brief Some basic non-inline functions and static global data.
+
+#include<lemon/tolerance.h>
+#include<lemon/core.h>
+#include<lemon/time_measure.h>
+namespace lemon {
+
+  float Tolerance<float>::def_epsilon = static_cast<float>(1e-4);
+  double Tolerance<double>::def_epsilon = 1e-10;
+  long double Tolerance<long double>::def_epsilon = 1e-14;
+
+#ifndef LEMON_ONLY_TEMPLATES
+  const Invalid INVALID = Invalid();
+#endif
+
+  TimeStamp::Format TimeStamp::_format = TimeStamp::NORMAL;
+
+} //namespace lemon