Reference documentation for deal.II version 9.2.0
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#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 |
Standardized data struct to pipe additional flags to the preconditioner.
Definition at line 613 of file petsc_precondition.h.
PETScWrappers::PreconditionLU::AdditionalData::AdditionalData | ( | const double | pivoting = 1.e-6 , |
const double | zero_pivot = 1.e-12 , |
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const double | damping = 0.0 |
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) |
Constructor. (Default values taken from function PCCreate_LU of the PETSc lib.)
Definition at line 701 of file petsc_precondition.cc.
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 628 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 634 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 640 of file petsc_precondition.h.