petsc-3.13.6 2020-09-29
PCASMCreateSubdomains2D
Creates the index sets for the overlapping Schwarz preconditioner for a two-dimensional problem on a regular grid.
Synopsis
#include "petscpc.h"
PetscErrorCode PCASMCreateSubdomains2D(PetscInt m,PetscInt n,PetscInt M,PetscInt N,PetscInt dof,PetscInt overlap,PetscInt *Nsub,IS **is,IS **is_local)
Not Collective
Input Parameters
| m, n | - the number of mesh points in the x and y directions
|
| M, N | - the number of subdomains in the x and y directions
|
| dof | - degrees of freedom per node
|
| overlap | - overlap in mesh lines
|
Output Parameters
| Nsub | - the number of subdomains created
|
| is | - array of index sets defining overlapping (if overlap > 0) subdomains
|
| is_local | - array of index sets defining non-overlapping subdomains
|
Note
Presently PCAMSCreateSubdomains2d() is valid only for sequential
preconditioners. More general related routines are
PCASMSetTotalSubdomains() and PCASMSetLocalSubdomains().
See Also
PCASMSetTotalSubdomains(), PCASMSetLocalSubdomains(), PCASMGetSubKSP(),
PCASMSetOverlap()
Level
advanced
Location
src/ksp/pc/impls/asm/asm.c
Examples
src/ksp/ksp/tutorials/ex8.c.html
Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages