petsc-3.10.2 2018-10-09
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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)

See Also

MatCreateSubMatrices()

Level

developer

Location

src/mat/interface/matrix.c
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages