Reference documentation for deal.II version Git 35565f205e 2019-09-24 08:33:37 +0200
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Public Member Functions | Public Attributes | List of all members
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 607 of file petsc_precondition.h.

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 691 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 622 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 628 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 634 of file petsc_precondition.h.


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