PETScWrappers::PreconditionLU::AdditionalData Struct Reference

#include <deal.II/lac/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

Detailed Description

Standardized data struct to pipe additional flags to the preconditioner.

Definition at line 608 of file petsc_precondition.h.

Constructor & Destructor Documentation

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 691 of file petsc_precondition.cc.

Member Data Documentation

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 623 of file petsc_precondition.h.

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 629 of file petsc_precondition.h.

double PETScWrappers::PreconditionLU::AdditionalData::damping

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

Definition at line 635 of file petsc_precondition.h.

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

• deal.II/lac/petsc_precondition.h
• /mnt/data/darndt/Sources/dealii-clang-6.0.0/source/lac/petsc_precondition.cc