petsc-3.12.5 2020-03-29
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
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| dof | - degrees of freedom per node
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| overlap | - overlap in mesh lines
|
Output Parameters
| Nsub | - the number of local subdomains created
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| 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