petsc-3.14.6 2021-03-30

PCASMGetLocalSubdomains

Gets the local subdomains (for this processor only) for the additive Schwarz preconditioner.

#include "petscpc.h" 
PetscErrorCode  PCASMGetLocalSubdomains(PC pc,PetscInt *n,IS *is[],IS *is_local[])

Not Collective

- the preconditioner context

	n	- if requested, the number of subdomains for this processor (default value = 1)
	is	- if requested, the index sets that define the subdomains for this processor
	is_local	- if requested, the index sets that define the local part of the subdomains for this processor (can be NULL)

The IS numbering is in the parallel, global numbering of the vector.

advanced