/usr/include/trilinos/Teko_DiagonalPreconditionerOp.hpp is in libtrilinos-teko-dev 12.12.1-5.
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// Teko: A package for block and physics based preconditioning
// Copyright 2010 Sandia Corporation
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#ifndef __Teko_DiagonalPreconditionerOp_hpp__
#define __Teko_DiagonalPreconditionerOp_hpp__
#include "Teko_Utilities.hpp"
#include "Teko_ImplicitLinearOp.hpp"
class EpetraExt_PointToBlockDiagPermute;
namespace Teko {
class DiagonalPreconditionerOp :public ImplicitLinearOp {
public:
/** @brief Constuctor */
DiagonalPreconditionerOp(Teuchos::RCP<EpetraExt_PointToBlockDiagPermute> BDP, const VectorSpace range, const VectorSpace domain);
/** @brief Range space of this operator */
virtual VectorSpace range() const {return range_;}
/** @brief Domain space of this operator */
virtual VectorSpace domain() const {return domain_;}
/** @brief Apply the preconditioner
*
* The <code>apply</code> function takes one vector as input
* and applies a linear preconditioner. The result
* is returned in \f$y\f$. If this operator is reprsented as \f$M\f$ then
* \f$ y = \alpha M x + \beta y \f$
*
* @param[in] x
* @param[in,out] y
* @param[in] alpha (default=1)
* @param[in] beta (default=0)
*/
virtual void implicitApply(const MultiVector & x, MultiVector & y,
const double alpha = 1.0, const double beta = 0.0) const;
virtual void describe(Teuchos::FancyOStream &out_arg,
const Teuchos::EVerbosityLevel verbLevel) const;
Teuchos::RCP<EpetraExt_PointToBlockDiagPermute> get_BDP() const {return BDP_;}
private:
Teuchos::RCP<EpetraExt_PointToBlockDiagPermute> BDP_;
const VectorSpace range_, domain_;
};
} // end namespace Teko
#endif
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