PETSc version 3.15.5
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
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