petsc-master 2019-08-22
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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

See Also

PCGASMSetSubdomains(), PCGASMGetSubKSP(), PCGASMSetOverlap()

Level

advanced

Location

src/ksp/pc/impls/gasm/gasm.c

Examples

src/ksp/ksp/examples/tutorials/ex62.c.html
src/ksp/ksp/examples/tutorials/ex64.c.html

Index of all PC routines
Table of Contents for all manual pages
Index of all manual pages