PCASMGetLocalSubmatrices#
Gets the local submatrices (for this processor only) for the additive Schwarz preconditioner, PCASM.
Synopsis#
#include "petscpc.h"
PetscErrorCode PCASMGetLocalSubmatrices(PC pc, PetscInt *n, Mat *mat[])
Not Collective
Input Parameter#
pc - the preconditioner context
Output Parameters#
n - if requested, the number of matrices for this processor (default value = 1)
mat - if requested, the matrices
Notes#
Call after PCSetUp() (or KSPSetUp()) but before PCApply() and before PCSetUpOnBlocks())
Usually one would use PCSetModifySubMatrices() to change the submatrices in building the preconditioner.
Fortran Note#
Pass PETSC_NULL_MAT_POINTER for mat if not needed. If the PC is not a PCASM, mat is returned disassociated.
See Also#
KSP: Linear System Solvers, PCASM, PCASMSetTotalSubdomains(), PCASMSetOverlap(), PCASMGetSubKSP(),
PCASMCreateSubdomains2D(), PCASMSetLocalSubdomains(), PCASMGetLocalSubdomains(), PCSetModifySubMatrices()
Level#
advanced
Location#
Examples#
src/ksp/ksp/tutorials/ex8.c
src/ksp/pc/tests/ex10f.F90
Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages