#include "petscpc.h" PetscErrorCode PCSPAISetSp(PC pc,int sp)
|pc||- the preconditioner|
|n||- 0 or 1|
Notes: If A has a symmetric nonzero pattern use -sp 1 to improve performance by eliminating some communication in the parallel version. Even if A does not have a symmetric nonzero pattern -sp 1 may well lead to good results, but the code will not follow the published SPAI algorithm exactly.
Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages