petsc-3.9.4 2018-09-11
MatCholeskyFactor
Performs in-place Cholesky factorization of a symmetric matrix.
Synopsis
#include "petscmat.h"
PetscErrorCode MatCholeskyFactor(Mat mat,IS perm,const MatFactorInfo *info)
Collective on Mat
Input Parameters
| mat | - the matrix
|
| perm | - row and column permutations
|
| f | - expected fill as ratio of original fill
|
Notes
See MatLUFactor() for the nonsymmetric case. See also
MatCholeskyFactorSymbolic(), and MatCholeskyFactorNumeric().
Most users should employ the simplified KSP interface for linear solvers
instead of working directly with matrix algebra routines such as this.
See, e.g., KSPCreate().
See Also
MatLUFactor(), MatCholeskyFactorSymbolic(), MatCholeskyFactorNumeric()
MatGetOrdering()
Developer Note: fortran interface is not autogenerated as the f90
interface defintion cannot be generated correctly [due to MatFactorInfo]
Level
developer
Location
src/mat/interface/matrix.c
Implementations
MatCholeskyFactor_SeqDense in src/mat/impls/dense/seq/dense.c
MatCholeskyFactor_Elemental in src/mat/impls/elemental/matelem.cxx
MatCholeskyFactor_SeqSBAIJ in src/mat/impls/sbaij/seq/sbaijfact.c
Index of all Mat routines
Table of Contents for all manual pages
Index of all manual pages