petsc-3.7.7 2017-09-25

ISConcatenate

Forms a new IS by locally concatenating the indices from an IS list without reordering.

#include "petscis.h"  
PetscErrorCode ISConcatenate(MPI_Comm comm, PetscInt len, const IS islist[], IS *isout)

Collective on comm.

	comm	- communicator of the concatenated IS.
	len	- size of islist array (nonnegative)
	islist	- array of index sets

isout -The concatenated index set; empty, if len == 0.

Notes: The semantics of calling this on comm imply that the comms of the members if islist also contain this rank.