PETSc version 3.15.5

MatMAIJGetAIJ

Get the AIJ matrix describing the blockwise action of the MAIJ matrix

#include "petscmat.h" 
PetscErrorCode  MatMAIJGetAIJ(Mat A,Mat *B)

Not Collective, but if the MAIJ matrix is parallel, the AIJ matrix is also parallel

- the MAIJ matrix

- the AIJ matrix

The reference count on the AIJ matrix is not increased so you should not destroy it.

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