MatIncompleteCholeskyFactor

Performs in-place incomplete Cholesky factorization of matrix.

Synopsis

#include "petscmat.h" 
int MatIncompleteCholeskyFactor(Mat mat,IS row,PetscReal fill,int level)
Collective on Mat

Input Parameters

mat - the matrix
row - row/column permutation
fill - expected fill factor >= 1.0
level - level of fill, for ICC(k)

Notes

Probably really in-place only when level of fill is zero, otherwise allocates new space to store factored matrix and deletes previous memory.

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

Keywords

matrix, factor, incomplete Cholesky, in-place

See Also

MatIncompleteCholeskyFactorSymbolic(), MatLUFactorNumeric(), MatCholeskyFactor()

Level:developer
Location:
src/mat/interface/matrix.c
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