petsc-3.12.5 2020-03-29

MatInvertBlockDiagonalMat

set matrix C to be the inverted block diagonal of matrix A

#include "petscmat.h" 
PetscErrorCode MatInvertBlockDiagonalMat(Mat A,Mat C)

Collective on Mat

A -the matrix

C -matrix with inverted block diagonal of A. This matrix should be created and may have its type set.

Notes: the blocksize of the matrix is used to determine the blocks on the diagonal of C

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