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

Matrices, Mat, MatCreateSubMatrices(), MatIncreaseOverlap()

Level

developer

Location

src/mat/interface/matrix.c

Examples

src/ksp/ksp/tutorials/ex64.c

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Index of all Mat routines
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Index of all manual pages