petsc-3.13.6 2020-09-29
PCSPAISetNBSteps
set maximum number of improvement steps per row in the SPAI preconditioner
Synopsis
#include "petscpc.h"
PetscErrorCode PCSPAISetNBSteps(PC pc,int nbsteps1)
Input Parameters
| pc | - the preconditioner
|
| n | - number of steps (default 5)
|
Notes
SPAI constructs to approximation to every column of
the exact inverse of A in a series of improvement
steps. The quality of the approximation is determined
by epsilon. If an approximation achieving an accuracy
of epsilon is not obtained after ns steps, SPAI simply
uses the best approximation constructed so far.
See Also
PCSPAI, PCSetType(), PCSPAISetMaxNew()
Level
intermediate
Location
src/ksp/pc/impls/spai/ispai.c
Implementations
PCSPAISetNBSteps_SPAI in src/ksp/pc/impls/spai/ispai.c
Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages