PETSc version 3.15.5
PCSPAISetSp
specify a symmetric matrix sparsity pattern in the SPAI preconditioner 
Synopsis
#include "petscpc.h" 
PetscErrorCode  PCSPAISetSp(PC pc,int sp)
Input Parameters
|  | 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.
See Also
 PCSPAI, PCSetType()
Level
intermediate
Location
src/ksp/pc/impls/spai/ispai.c
Implementations
PCSPAISetSp_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