petsc-3.14.6 2021-03-30
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MatNestGetISs

 Returns the index sets partitioning the row and column spaces

Synopsis

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

Input Parameters

A - nest matrix

Output Parameter

rows - array of row index sets
cols - array of column index sets

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(), MatNestGetLocalISs(), MATNEST,
MatCreateNest(), MatNestGetSubMats(), MatNestSetSubMats()

Level

advanced

Location

src/mat/impls/nest/matnest.c

Examples

src/snes/tutorials/ex70.c.html

Implementations

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

Index of all Mat routines
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Index of all manual pages