petsc-3.7.5 2017-01-01

PCASMSetLocalSubdomains

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

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

Collective on PC

	pc	- the preconditioner context
	n	- the number of subdomains for this processor (default value = 1)
	is	- the index set that defines the subdomains for this processor (or NULL for PETSc to determine subdomains)
	is_local	- the index sets that define the local part of the subdomains for this processor (or NULL to use the default of 1 subdomain per process)

The IS numbering is in the parallel, global numbering of the vector for both is and is_local

By default the ASM preconditioner uses 1 block per processor.

Use PCASMSetTotalSubdomains() to set the subdomains for all processors.

PC, ASM, set, local, subdomains, additive Schwarz