PCLUSetDamping

 adds this quantity to the diagonal of the matrix during the LU numerical factorization

Synopsis

#include "petscpc.h" 
int PCLUSetDamping(PC pc,PetscReal damping)
Collective on PC

Input Parameters

pc - the preconditioner context
damping - amount of damping (use PETSC_DECIDE for default of 1.e-12)

Options Database Key

-pc_lu_damping <damping> -Sets damping amount or PETSC_DECIDE for the default

Note: If 0.0 is given, then no damping is used. If a diagonal element is classified as a zero pivot, then the damping is doubled until this is alleviated.

Keywords

PC, set, factorization, direct, fill

See Also

PCILUSetFill(), PCILUSetDamp()

Level:intermediate
Location:src/sles/pc/impls/lu/lu.c
Index of all PC routines
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Index of all manual pages