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// ***********************************************************************
//
// Moocho: Multi-functional Object-Oriented arCHitecture for Optimization
// Copyright (2003) 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 Roscoe A. Bartlett (rabartl@sandia.gov)
//
// ***********************************************************************
// @HEADER
#ifndef ALAP_MATRIX_SYM_IDENTITY_H
#define ALAP_MATRIX_SYM_IDENTITY_H
#include "AbstractLinAlgPack_MatrixSymOpNonsing.hpp"
#include "AbstractLinAlgPack_VectorSpace.hpp"
namespace AbstractLinAlgPack {
/** \brief Matrix subclass for a scaled identity matrix.
*
* More operations will be overridden as they are needed by various applications.
*/
class MatrixSymIdent : virtual public MatrixSymOpNonsing {
public:
/** @name Constructors/initializers */
//@{
/// Calls <tt>this->initialize()</tt>.
MatrixSymIdent(
const VectorSpace::space_ptr_t& vec_space = Teuchos::null
,const value_type scale = 1.0
);
/** \brief . */
void initialize(
const VectorSpace::space_ptr_t& vec_space
,const value_type scale = 1.0
);
//@}
/** @name Access */
//@{
/** \brief . */
value_type scale() const;
//@}
/** @name Overridden from MatrixBase */
//@{
/// Returns 0 if not initalized.
size_type rows() const;
/// Returns <tt>this->rows()</tt>
size_type nz() const;
//@}
/** @name Overridden from MatrixOp */
//@{
/** \brief . */
const VectorSpace& space_cols() const;
/** \brief . */
std::ostream& output(std::ostream& out) const;
/** \brief . */
void Vp_StMtV(
VectorMutable* v_lhs, value_type alpha, BLAS_Cpp::Transp trans_rhs1
,const Vector& v_rhs2, value_type beta ) const;
//@}
/** @name Overridden from MatrixNonsing */
//@{
/** \brief . */
void V_InvMtV(
VectorMutable* v_lhs, BLAS_Cpp::Transp trans_rhs1
,const Vector& v_rhs2 ) const;
//@}
private:
VectorSpace::space_ptr_t vec_space_;
value_type scale_;
}; // end class MatrixSymIdent
// ///////////////////////////////////////////
// Inline members
inline
value_type MatrixSymIdent::scale() const
{
return scale_;
}
} // end namespace AbstractLinAlgPack
#endif // ALAP_MATRIX_SYM_IDENTITY_H
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