Ifpack2_PowerMethod.hpp File Reference

Definition of power methods. More...

#include "Kokkos_ArithTraits.hpp"
#include "Teuchos_FancyOStream.hpp"
#include "Teuchos_oblackholestream.hpp"
#include "Tpetra_Details_residual.hpp"
#include <cmath>
#include <iostream>

Go to the source code of this file.

Namespaces
	Ifpack2
	Preconditioners and smoothers for Tpetra sparse matrices.

Functions
template<class OperatorType , class V >
V::scalar_type	Ifpack2::PowerMethod::powerMethodWithInitGuess (const OperatorType &A, const V &D_inv, const int numIters, Teuchos::RCP< V > x, Teuchos::RCP< V > y, const typename Teuchos::ScalarTraits< typename V::scalar_type >::magnitudeType tolerance=1e-7, const int eigNormalizationFreq=1, Teuchos::RCP< Teuchos::FancyOStream > out=Teuchos::null, const bool computeSpectralRadius=true)
	Use the power method to estimate the maximum eigenvalue of A*D_inv, given an initial guess vector x. More...
template<class V >
void	Ifpack2::PowerMethod::computeInitialGuessForPowerMethod (V &x, const bool nonnegativeRealParts)
	Fill x with random initial guess for power method. More...
template<class OperatorType , class V >
V::scalar_type	Ifpack2::PowerMethod::powerMethod (const OperatorType &A, const V &D_inv, const int numIters, Teuchos::RCP< V > y, const typename Teuchos::ScalarTraits< typename V::scalar_type >::magnitudeType tolerance=1e-7, const int eigNormalizationFreq=1, Teuchos::RCP< Teuchos::FancyOStream > out=Teuchos::null, const bool computeSpectralRadius=true)
	Use the power method to estimate the maximum eigenvalue of A*D_inv. More...

Detailed Description

Definition of power methods.

Author

Graham Harper

This file describes power methods for use throughout Ifpack2