MatCholeskyFactor

Performs in-place Cholesky factorization of a symmetric matrix.

Synopsis

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

Collective

Input Parameters

• mat - the matrix

• perm - row and column permutations

• info - expected fill as ratio of original fill

Notes

See MatLUFactor() for the nonsymmetric case. See also MatGetFactor(), MatCholeskyFactorSymbolic(), 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]

See Also

Matrices, Mat, Matrix Factorization, MatGetFactor(), MatFactorInfo, MatLUFactor(), MatCholeskyFactorSymbolic(), MatCholeskyFactorNumeric() MatGetOrdering()

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
MatCholeskyFactor_ScaLAPACK() in src/mat/impls/scalapack/matscalapack.c
MatCholeskyFactor_HT() in src/mat/impls/transpose/htransm.c
MatCholeskyFactor_Transpose() in src/mat/impls/transpose/transm.c

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