MatCholeskyFactorSymbolic#

Performs symbolic Cholesky factorization of a symmetric matrix.

Synopsis#

#include "petscmat.h" 
PetscErrorCode MatCholeskyFactorSymbolic(Mat fact, Mat mat, IS perm, const MatFactorInfo *info)

Collective

Input Parameters#

fact - the factor matrix obtained with MatGetFactor()
mat - the matrix
perm - row and column permutations
info - options for factorization, includes

          fill - expected fill as ratio of original fill.
          dtcol - pivot tolerance (0 no pivot, 1 full column pivoting)
                   Run with the option -info to determine an optimal value to use

Notes#

See MatLUFactorSymbolic() for the nonsymmetric case. See also MatCholeskyFactor() and MatCholeskyFactorNumeric().

Most users should employ the KSP interface for linear solvers instead of working directly with matrix algebra routines such as this. See, e.g., KSPCreate().

Developer Note#

The Fortran interface is not autogenerated as the interface definition cannot be generated correctly [due to MatFactorInfo]

Level#

developer

Location#

src/mat/interface/matrix.c

Implementations#

Edit on GitLab

Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages