petsc-3.14.6 2021-03-30
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MatNestGetLocalISs

 Returns the index sets partitioning the row and column spaces

Synopsis

#include "petscmat.h"   
PetscErrorCode  MatNestGetLocalISs(Mat A,IS rows[],IS cols[])
Not collective

Input Parameters

A - nest matrix

Output Parameter

rows - array of row index sets (or NULL to ignore)
cols - array of column index sets (or NULL to ignore)

Notes

The user must have allocated arrays of the correct size. The reference count is not increased on the returned ISs.

See Also

MatNestGetSubMat(), MatNestGetSubMats(), MatNestGetSize(), MatNestGetISs(), MatCreateNest(),
MATNEST, MatNestSetSubMats(), MatNestSetSubMat()

Level

advanced

Location

src/mat/impls/nest/matnest.c

Implementations

MatNestGetLocalISs_Nest in src/mat/impls/nest/matnest.c

Index of all Mat routines
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Index of all manual pages