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// LOCA: Library of Continuation Algorithms Package
// Copyright (2005) Sandia Corporation
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#ifndef LOCA_TIMEDEPENDENT_ABSTRACTGROUP_H
#define LOCA_TIMEDEPENDENT_ABSTRACTGROUP_H
#include "LOCA_MultiContinuation_AbstractGroup.H" // base class
namespace LOCA {
namespace TimeDependent {
/*!
* \brief Interface to underlying groups for time dependent systems
*/
/*!
* This abstract class provides an interface for time dependent problems,
* i.e., problems with a mass matrix (typically used in eignvalue or
* Hopf calculations). It provides pure virtual methods for computing
* and manipulating the shifted matrix \f$\alpha J + \beta M\f$ where
* \f$J\f$ is the Jacobian matrix and \f$M\f$ is the mass matrix.
*/
class AbstractGroup :
public virtual LOCA::MultiContinuation::AbstractGroup {
public:
//! Default constructor.
AbstractGroup() {}
//! Destructor
virtual ~AbstractGroup() {}
/*!
* @name Pure virtual methods
* These methods must be defined by any concrete implementation
*/
//@{
//! Compute the shifted matrix
virtual NOX::Abstract::Group::ReturnType
computeShiftedMatrix(double alpha, double beta) = 0;
//! Multiply the shifted matrix by a vector.
virtual NOX::Abstract::Group::ReturnType
applyShiftedMatrix(const NOX::Abstract::Vector& input,
NOX::Abstract::Vector& result) const = 0;
//! Multiply the shifted matrix by a multi-vector.
virtual NOX::Abstract::Group::ReturnType
applyShiftedMatrixMultiVector(
const NOX::Abstract::MultiVector& input,
NOX::Abstract::MultiVector& result) const = 0;
/*!
* \brief Apply the inverse of the shifted matrix by a multi-vector, as
* needed by the shift-and-invert and generalized Cayley transformations.
*/
virtual NOX::Abstract::Group::ReturnType
applyShiftedMatrixInverseMultiVector(
Teuchos::ParameterList& params,
const NOX::Abstract::MultiVector& input,
NOX::Abstract::MultiVector& result) const = 0;
//@}
//! Compute the second shifted matrix. Can avoid recomputing if two are stored.
/*!
* Implementation here prints an error message and returns
* NOX::Abstract::Group::NotDefined.
*/
virtual NOX::Abstract::Group::ReturnType
computeSecondShiftedMatrix(double alpha, double beta) = 0;
//! Multiply the shifted matrix by a vector.
/*!
* Implementation here prints an error message and returns
* NOX::Abstract::Group::NotDefined.
*/
virtual NOX::Abstract::Group::ReturnType
applySecondShiftedMatrix(const NOX::Abstract::Vector& input,
NOX::Abstract::Vector& result) const = 0;
//! Multiply the shifted matrix by a multi-vector.
/*!
* Implementation here prints an error message and returns
* NOX::Abstract::Group::NotDefined.
*/
virtual NOX::Abstract::Group::ReturnType
applySecondShiftedMatrixMultiVector(
const NOX::Abstract::MultiVector& input,
NOX::Abstract::MultiVector& result) const = 0;
//@}
//! Bring NOX::Abstract::Group::operator=() into scope
using NOX::Abstract::Group::operator=;
};
} // namespace TimeDependent
} // namespace LOCA
#endif
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