petsc-3.8.4 2018-03-24

MatIncreaseOverlapSplit

Given a set of submatrices indicated by index sets across a sub communicator, replaces the index sets by larger ones that represent submatrices with additional overlap.

Synopsis

#include "petscmat.h" 
PetscErrorCode MatIncreaseOverlapSplit(Mat mat,PetscInt n,IS is[],PetscInt ov)

Collective on Mat

Input Parameters

	mat	- the matrix
	n	- the number of index sets
	is	- the array of index sets (these index sets will changed during the call)
	ov	- the additional overlap requested

Options Database

-mat_increase_overlap_scalable -use a scalable algorithm to compute the overlap (supported by MPIAIJ matrix)

MatIncreaseOverlapSplit

Synopsis

Input Parameters

Options Database

See Also