SolverQMRS< VECTOR >::AdditionalData Struct Reference

List of all members.

Public Member Functions
	AdditionalData (bool exact_residual=false, double breakdown=1.e-16)
Public Attributes
bool	exact_residual
double	breakdown

---

Detailed Description

template<class VECTOR = Vector<double>>
struct SolverQMRS< VECTOR >::AdditionalData

Standardized data struct to pipe additional data to the solver.

There are two possibilities to compute the residual: one is an estimate using the computed value tau. The other is exact computation using another matrix vector multiplication.

QMRS, is susceptible to breakdowns, so we need a parameter telling us, which numbers are considered zero. The proper breakdown criterion is very unclear, so experiments may be necessary here.

---

Constructor & Destructor Documentation

template<class VECTOR = Vector<double>>

SolverQMRS< VECTOR >::AdditionalData::AdditionalData	(	bool	exact_residual = false,
		double	breakdown = 1.e-16
	)			[inline]

Constructor.

The default is no exact residual computation and breakdown parameter 1e-16.

---

Member Data Documentation

template<class VECTOR = Vector<double>>

bool SolverQMRS< VECTOR >::AdditionalData::exact_residual

Flag for exact computation of residual.

template<class VECTOR = Vector<double>>

double SolverQMRS< VECTOR >::AdditionalData::breakdown

Breakdown threshold.

---

The documentation for this struct was generated from the following file:

• lac/include/lac/solver_qmrs.h