MatInvertVariableBlockEnvelope#
set matrix C to be the inverted block diagonal of matrix A
Synopsis#
#include "petscmat.h"
PetscErrorCode MatInvertVariableBlockEnvelope(Mat A, MatReuse reuse, Mat *C)
Collective
Input Parameters#
A - the matrix
reuse - indicates if the
Cmatrix was obtained from a previous call to this routine
Output Parameter#
C - matrix with inverted block diagonal of
A
Note#
For efficiency the matrix A should have all the nonzero entries clustered in smallish blocks along the diagonal.
See Also#
Matrices, Mat, MatInvertBlockDiagonal(), MatComputeBlockDiagonal()
Level#
advanced
Location#
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages