petsc-dev 2014-04-18
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PCGASMCreateSubdomains2D

Creates the index sets for the overlapping Schwarz preconditioner for a two-dimensional problem on a regular grid.

Synopsis

#include "petscpc.h" 
PetscErrorCode  PCGASMCreateSubdomains2D(PC pc, PetscInt M,PetscInt N,PetscInt Mdomains,PetscInt Ndomains,PetscInt dof,PetscInt overlap, PetscInt *nsub,IS **iis,IS **ois)
Collective

Input Parameters

M, N - the global number of grid points in the x and y directions
Mdomains, Ndomains - the global 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 local subdomains created
iis - array of index sets defining inner (nonoverlapping) subdomains
ois - array of index sets defining outer (overlapping, if overlap > 0) subdomains

Keywords

PC, GASM, additive Schwarz, create, subdomains, 2D, regular grid

See Also

PCGASMSetTotalSubdomains(), PCGASMSetSubdomains(), PCGASMGetSubKSP(),
PCGASMSetOverlap()

Level:advanced
Location:
src/ksp/pc/impls/gasm/gasm.c
Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages

Examples

src/ksp/ksp/examples/tutorials/ex8g.c.html