petsc-3.12.5 2020-03-29

MatGetDM

Gets the DM defining the data layout of the matrix

#include "petscdm.h"          
#include "petscdmlabel.h"     
#include "petscds.h"     
PetscErrorCode MatGetDM(Mat A, DM *dm)

Not collective

A -The Mat

dm -The DM

Developer Note: Since the Mat class doesn't know about the DM class the DM object is associated with the Mat through a PetscObjectCompose() operation

intermediate