#include <deal.II/lac/petsc_precondition.h>

Detailed Description

Standardized data struct to pipe additional flags to the preconditioner.

Definition at line 549 of file petsc_precondition.h.

Public Member Functions
	AdditionalData (const double pivoting=1.e-6, const double zero_pivot=1.e-12, const double damping=0.0)

Public Attributes
double	pivoting
double	zero_pivot
double	damping

Constructor & Destructor Documentation

◆ AdditionalData()

PETScWrappers::PreconditionLU::AdditionalData::AdditionalData	(	const double	pivoting = 1.e-6,
		const double	zero_pivot = 1.e-12,
		const double	damping = 0.0 )

Constructor. (Default values taken from function PCCreate_LU of the PETSc lib.)

Definition at line 853 of file petsc_precondition.cc.

Member Data Documentation

◆ pivoting

double PETScWrappers::PreconditionLU::AdditionalData::pivoting

Determines, when Pivoting is done during LU decomposition. 0.0 indicates no pivoting, and 1.0 complete pivoting. Confer PETSc manual for more details.

Definition at line 564 of file petsc_precondition.h.

◆ zero_pivot

double PETScWrappers::PreconditionLU::AdditionalData::zero_pivot

Size at which smaller pivots are declared to be zero. Confer PETSc manual for more details.

Definition at line 570 of file petsc_precondition.h.

◆ damping

double PETScWrappers::PreconditionLU::AdditionalData::damping

This quantity is added to the diagonal of the matrix during factorization.

Definition at line 576 of file petsc_precondition.h.

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

include/deal.II/lac/petsc_precondition.h
source/lac/petsc_precondition.cc