petscmain 20210420
PCASMCreateSubdomains2D
Creates the index sets for the overlapping Schwarz preconditioner for a twodimensional 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 nonoverlapping 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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Index of all manual pages