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
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 Key#
- -mat_increase_overlap_scalable - use a scalable algorithm to compute the overlap (supported by MPIAIJ matrix) 
See Also#
Level#
developer
Location#
Examples#
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages