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 C matrix 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#

src/mat/interface/matrix.c

Index of all Mat routines
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Index of all manual pages