petsc-master 2019-09-18
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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/examples/tutorials/ex8.c.html

Index of all PC routines
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Index of all manual pages