libMesh::NonlinearImplicitSystem::ComputeVectorSubspace Class Reference

#include <nonlinear_implicit_system.h>

List of all members.

Public Member Functions
virtual	~ComputeVectorSubspace ()
virtual void	operator() (std::vector< NumericVector< Number > * > &sp, sys_type &s)

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Detailed Description

Callable abstract base class to be used as a callback to provide the solver with a basis for the system's Jacobian's nullspace (the kernel or the "zero energy modes") or near-nullspace (the "low energy modes"). A nullspace can be used to solve a degenerate problem iteratively (e.g., with a Krylov subspace method). A near nullspace can be used by an Algebraic Multigrid (AMG) preconditioner to construct smoothed- aggregation-like coarse spaces.

Definition at line 140 of file nonlinear_implicit_system.h.

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Constructor & Destructor Documentation

virtual libMesh::NonlinearImplicitSystem::ComputeVectorSubspace::~ComputeVectorSubspace

(

)

[inline, virtual]

Definition at line 143 of file nonlinear_implicit_system.h.

{}

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Member Function Documentation

virtual void libMesh::NonlinearImplicitSystem::ComputeVectorSubspace::operator()	(	std::vector< NumericVector< Number > * > &	sp,
		sys_type &	s
	)		[virtual]

This function will be called to compute the subspace basis (e.g., nullspace or nearnullspace). It must be implemented by the user in a derived class.

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

• nonlinear_implicit_system.h