peclet::core::solver::GraphAMG Class Reference

Smoothed-aggregation AMG hierarchy usable as z = M⁻¹ r (one symmetric V-cycle from a zero initial guess) — the CG preconditioner that makes the iteration count mesh-independent. More...

#include <graph_amg.hpp>

Public Member Functions
void	build (const HostCsrOp &A, const AmgParams &prm={})
void	apply (const std::vector< double > &r, std::vector< double > &z) const
	z = M⁻¹ r: one V-cycle (correction scheme) from a zero initial guess.
int	numLevels () const
Index	size (int L=0) const
double	operatorComplexity () const
	Total nonzeros / finest nonzeros — the grid+operator complexity (should stay ~<2 for a healthy hierarchy; a useful health check when tuning theta).

Detailed Description

Smoothed-aggregation AMG hierarchy usable as z = M⁻¹ r (one symmetric V-cycle from a zero initial guess) — the CG preconditioner that makes the iteration count mesh-independent.

Definition at line 89 of file graph_amg.hpp.

Member Function Documentation

build()

void peclet::core::solver::GraphAMG::build ( const HostCsrOp &  A, const AmgParams &  prm = {}  )

inline

Definition at line 91 of file graph_amg.hpp.

apply()

void peclet::core::solver::GraphAMG::apply ( const std::vector< double > &  r, std::vector< double > &  z  ) const

inline

z = M⁻¹ r: one V-cycle (correction scheme) from a zero initial guess.

Definition at line 111 of file graph_amg.hpp.

Referenced by peclet::core::solver::amgPcg().

numLevels()

int peclet::core::solver::GraphAMG::numLevels ( ) const

inline

Definition at line 119 of file graph_amg.hpp.

size()

Index peclet::core::solver::GraphAMG::size ( int  L = 0 ) const

inline

Definition at line 120 of file graph_amg.hpp.

References peclet::core::solver::HostCsrOp::n.

operatorComplexity()

double peclet::core::solver::GraphAMG::operatorComplexity ( ) const

inline

Total nonzeros / finest nonzeros — the grid+operator complexity (should stay ~<2 for a healthy hierarchy; a useful health check when tuning theta).

Definition at line 124 of file graph_amg.hpp.

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

• graph_amg.hpp