MatComputeVariableBlockEnvelope#
Given a matrix whose nonzeros are in blocks along the diagonal this computes and stores the sizes of these blocks in the matrix. An individual block may lie over several processes.
Synopsis#
#include "petscmat.h"
PetscErrorCode MatComputeVariableBlockEnvelope(Mat mat)
Collective
Input Parameter#
mat - the matrix
Notes#
There can be zeros within the blocks
The blocks can overlap between processes, including laying on more than two processes
See Also#
Matrices, Mat, MatInvertVariableBlockEnvelope(), MatSetVariableBlockSizes()
Level#
intermediate
Location#
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages