/usr/include/trilinos/Thyra_DefaultDiagonalLinearOpWithSolve_decl.hpp is in libtrilinos-dev 10.4.0.dfsg-1ubuntu2.
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// ***********************************************************************
//
// Thyra: Interfaces and Support for Abstract Numerical Algorithms
// Copyright (2004) Sandia Corporation
//
// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
// license for use of this work by or on behalf of the U.S. Government.
//
// This library is free software; you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation; either version 2.1 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA
// Questions? Contact Michael A. Heroux (maherou@sandia.gov)
//
// ***********************************************************************
// @HEADER
#ifndef THYRA_DIAGONAL_LINEAR_OP_WITH_SOLVE_DECL_HPP
#define THYRA_DIAGONAL_LINEAR_OP_WITH_SOLVE_DECL_HPP
#include "Thyra_DefaultDiagonalLinearOp.hpp"
#include "Thyra_LinearOpWithSolveBase.hpp"
namespace Thyra {
/** \brief Concrete <tt>LinearOpWithSolveBase</tt> subclass for diagonal linear
* operators.
*
* This class represents a diagonal linear operator <tt>M</tt> of the form:
\verbatim
M = diag(diag)
\endverbatim
*
* where <tt>diag</tt> is a <tt>VectorBase</tt> object.
*
* The defined operator implements <tt>this->apply()</tt> as follows:
*
\verbatim
y = alpha*op(M)*x + beta*y
=>
y(i) = alpha*diag(i)*x(i) + beta*y(i), for i = 0 ... n-1
\endverbatim
*
* where <tt>n = this->domain()->dim()</tt>.
*
* The defined operator implements <tt>this->solve()</tt> as follows:
*
\verbatim
x = inv(op(M))*b
=>
x(i) = b(i)/diag(i), for i = 0 ... n-1
\endverbatim
*
* where <tt>n = this->domain()->dim()</tt>.
*
* That is all there is to this subclass.
*/
template<class Scalar>
class DefaultDiagonalLinearOpWithSolve
: virtual public DefaultDiagonalLinearOp<Scalar>,
virtual public LinearOpWithSolveBase<Scalar>
{
public:
/** @name Constructors/initializers/accessors */
//@{
/** \brief Constructs to uninitialized.
*
* Postconditions:<ul>
* <li><tt>this->getDiag().get()==NULL</tt>
* </ul>
*/
DefaultDiagonalLinearOpWithSolve();
/// Calls <tt>initialize()</tt>
DefaultDiagonalLinearOpWithSolve(
const RCP<const VectorBase<Scalar> > &diag
);
protected:
/** @name Overridden from LinearOpWithSolveBase */
//@{
/** \brief . */
bool solveSupportsImpl(EOpTransp M_trans) const;
/** \brief . */
bool solveSupportsSolveMeasureTypeImpl(
EOpTransp M_trans, const SolveMeasureType& solveMeasureType) const;
/** \brief . */
SolveStatus<Scalar> solveImpl(
const EOpTransp transp,
const MultiVectorBase<Scalar> &B,
const Ptr<MultiVectorBase<Scalar> > &X,
const Ptr<const SolveCriteria<Scalar> > solveCriteria
) const;
//@}
};
/** \brief Nonmember constructor.
*
* \relates DefaultDiagonalLinearOpWithSolve
*/
template<class Scalar>
RCP<DefaultDiagonalLinearOpWithSolve<Scalar> >
defaultDiagonalLinearOpWithSolve()
{
return Teuchos::rcp(new DefaultDiagonalLinearOpWithSolve<Scalar>);
}
/** \brief Nonmember constructor.
*
* \relates DefaultDiagonalLinearOpWithSolve
*/
template<class Scalar>
RCP<DefaultDiagonalLinearOpWithSolve<Scalar> >
defaultDiagonalLinearOpWithSolve(
const RCP<const VectorBase<Scalar> > &diag
)
{
RCP<DefaultDiagonalLinearOpWithSolve<Scalar> > ddlows =
defaultDiagonalLinearOpWithSolve<Scalar>();
ddlows->initialize(diag);
return ddlows;
}
} // end namespace Thyra
#endif // THYRA_DIAGONAL_LINEAR_OP_WITH_SOLVE_DECL_HPP
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