petsc-3.11.4 2019-09-28
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MatComputeExplicitOperatorTranspose

 Computes the explicit matrix representation of a give matrix that can apply MatMultTranspose()

Synopsis

#include "petscmat.h"  
PetscErrorCode  MatComputeExplicitOperatorTranspose(Mat inmat,Mat *mat)
Collective on Mat

Input Parameter

inmat -the matrix

Output Parameter

mat -the explict operator transposed

Notes

This computation is done by applying the transpose of the operator to columns of the identity matrix.

Currently, this routine uses a dense matrix format when 1 processor is used and a sparse format otherwise. This routine is costly in general, and is recommended for use only with relatively small systems.

Keywords

Mat, compute, explicit, operator

Level

advanced

Location

src/mat/utils/axpy.c
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages