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diff --git a/scaddins/source/analysis/bessel.hxx b/scaddins/source/analysis/bessel.hxx
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+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2000, 2010 Oracle and/or its affiliates.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org 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 Lesser General Public License version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org.  If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+
+#ifndef SCA_BESSEL_HXX
+#define SCA_BESSEL_HXX
+
+#include <com/sun/star/lang/IllegalArgumentException.hpp>
+#include <com/sun/star/sheet/NoConvergenceException.hpp>
+#include <sal/types.h>
+
+namespace sca {
+namespace analysis {
+
+// ============================================================================
+//     BESSEL functions
+// ============================================================================
+
+/** Returns the result for the unmodified BESSEL function of first kind (J), n-th order, at point x. */
+double BesselJ( double x, sal_Int32 n ) throw( ::com::sun::star::lang::IllegalArgumentException, ::com::sun::star::sheet::NoConvergenceException );
+
+/** Returns the result for the modified BESSEL function of first kind (I), n-th order, at point x. */
+double BesselI( double x, sal_Int32 n ) throw( ::com::sun::star::lang::IllegalArgumentException, ::com::sun::star::sheet::NoConvergenceException );
+
+/** Returns the result for the unmodified BESSEL function of second kind (Y), n-th order, at point x. */
+double BesselY( double x, sal_Int32 n ) throw( ::com::sun::star::lang::IllegalArgumentException, ::com::sun::star::sheet::NoConvergenceException );
+
+/** Returns the result for the modified BESSEL function of second kind (K), n-th order, at point x. */
+double BesselK( double x, sal_Int32 n ) throw( ::com::sun::star::lang::IllegalArgumentException, ::com::sun::star::sheet::NoConvergenceException );
+
+// ============================================================================
+
+} // namespace analysis
+} // namespace sca
+
+#endif
+