petsc-3.7.7 2017-09-25

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

Examples