petsc-3.11.4 2019-09-28
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