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diff --git a/ETL/tags/0.4.11/ETL/_calculus.h b/ETL/tags/0.4.11/ETL/_calculus.h
deleted file mode 100644
index a9c95ed..0000000
--- a/ETL/tags/0.4.11/ETL/_calculus.h
+++ /dev/null
@@ -1,89 +0,0 @@
-/*! ========================================================================
-** Extended Template and Library
-** Calculus Functional Classes Implementation
-** $Id$
-**
-** Copyright (c) 2002 Robert B. Quattlebaum Jr.
-**
-** This package 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 package 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.
-**
-** === N O T E S ===========================================================
-**
-** ========================================================================= */
-
-/* === S T A R T =========================================================== */
-
-#ifndef __ETL__CALCULUS_H
-#define __ETL__CALCULUS_H
-
-/* === H E A D E R S ======================================================= */
-
-#include <functional>
-
-/* === M A C R O S ========================================================= */
-
-//#ifndef _EPSILON
-//#define _EPSILON		0.0000001
-//#endif
-
-#define ETL_FIXED_DERIVATIVE 1
-
-/* === T Y P E D E F S ===================================================== */
-
-/* === C L A S S E S & S T R U C T S ======================================= */
-
-_ETL_BEGIN_NAMESPACE
-
-template <typename T>
-class derivative : public std::unary_function<typename T::argument_type,typename T::result_type>
-{
-	T func;
-	typename T::argument_type epsilon;
-public:
-	explicit derivative(const T &x, const typename T::argument_type &epsilon=0.000001):func(x),epsilon(epsilon) { }
-
-	typename T::result_type
-	operator()(const typename T::argument_type &x)const
-	{
-#ifdef ETL_FIXED_DERIVATIVE
-		return (func(x+epsilon)-func(x))/epsilon;
-#else
-		return (func(x)-func(x+epsilon))/epsilon;
-#endif
-	}
-};
-
-template <typename T>
-class integral : public std::binary_function<typename T::argument_type,typename T::argument_type,typename T::result_type>
-{
-	T func;
-	int samples;
-public:
-	explicit integral(const T &x, const int &samples=500):func(x),samples(samples) { }
-
-	typename T::result_type
-	operator()(typename T::argument_type x,typename T::argument_type y)const
-	{
-		typename T::result_type ret=0;
-		int i=samples;
-		const typename T::argument_type increment=(y-x)/i;
-
-		for(;i;i--,x+=increment)
-			ret+=(func(x)+func(x+increment))*increment/2;
-		return ret;
-	}
-};
-
-_ETL_END_NAMESPACE
-
-/* === E N D =============================================================== */
-
-#endif