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//# IncEntropy.h: this defines the virtual base class for Incremental Entropy//# Copyright (C) 1996,1997,1998,1999,2000//# Associated Universities, Inc. Washington DC, USA.//#//# This library is free software; you can redistribute it and/or modify it//# under the terms of the GNU Library General Public License as published by//# the Free Software Foundation; either version 2 of the License, or (at your//# option) any later version.//#//# This library 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 Library General Public//# License for more details.//#//# You should have received a copy of the GNU Library General Public License//# along with this library; if not, write to the Free Software Foundation,//# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.//#//# Correspondence concerning AIPS++ should be addressed as follows://# Internet email: aips2-request@nrao.edu.//# Postal address: AIPS++ Project Office//# National Radio Astronomy Observatory//# 520 Edgemont Road//# Charlottesville, VA 22903-2475 USA//#//# $Id$namespace casa { //# NAMESPACE CASA - BEGIN//forward declarationclass IncCEMemModel;// <summary>Base class for incremental entropies used by incremental MEM algorithm</summary>// <use visibility=export>// <reviewed reviewer="" date="yyyy/mm/dd" tests="" demos="">// </reviewed>// <prerequisite> // <li> IncCEMemModel// </prerequisite>//// <etymology>// This class is called Entropy because it encapsulates the required// functionality of the entropy in the CE MEM algorithm. Inc is from// incremental, as the dirty image specifies an increment on a previous// major cycle's image, and the entropy is applied to the full// image + deltaImage.// </etymology>//// <synopsis>// Provide the generic interface to entropy functions.