petsc-3.6.1 2015-08-06
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PCGASMGetSubdomains

 Gets the subdomains supported on this processor for the additive Schwarz preconditioner.

Synopsis

#include "petscpc.h" 
PetscErrorCode  PCGASMGetSubdomains(PC pc,PetscInt *n,IS *iis[],IS *ois[])
Not Collective

Input Parameter

pc -the preconditioner context

Output Parameters

n - the number of subdomains for this processor (default value = 1)
iis - the index sets that define the inner subdomains (without overlap) supported on this processor (can be NULL)
ois - the index sets that define the outer subdomains (with overlap) supported on this processor (can be NULL)

Notes

The user is responsible for destroying the ISs and freeing the returned arrays. The IS numbering is in the parallel, global numbering of the vector.

Keywords

PC, GASM, get, subdomains, additive Schwarz

See Also

PCGASMSetOverlap(), PCGASMGetSubKSP(), PCGASMCreateSubdomains2D(),
PCGASMSetSubdomains(), PCGASMGetSubmatrices()

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