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/* -*- mode: c++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

 Copyright (C) 2008 Andreas Gaida
 Copyright (C) 2008 Ralph Schreyer
 Copyright (C) 2008 Klaus Spanderen

 This file is part of QuantLib, a free-software/open-source library
 for financial quantitative analysts and developers - http://quantlib.org/

 QuantLib is free software: you can redistribute it and/or modify it
 under the terms of the QuantLib license.  You should have received a
 copy of the license along with this program; if not, please email
 <quantlib-dev@lists.sf.net>. The license is also available online at

 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 license for more details.

/*! \file fdmlinearop.hpp
    \brief linear operator to model a multi dimensinal pde system

#ifndef quantlib_fdm_linear_op_hpp
#define quantlib_fdm_linear_op_hpp

#include <ql/math/array.hpp>

namespace QuantLib {

    class FdmLinearOp {
        typedef Array array_type;
        virtual ~FdmLinearOp() { }
        virtual Disposable<array_type> apply(const array_type& r) const = 0;


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