petsc-3.11.4 2019-09-28

MatICCFactorSymbolic

Performs symbolic incomplete Cholesky factorization for a symmetric matrix. Use MatCholeskyFactorNumeric() to complete the factorization.

Synopsis

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

Collective on Mat

Input Parameters

	mat	- the matrix
	perm	- row and column permutation
	info	- structure containing

     levels - number of levels of fill.

     expected fill - as ratio of original fill.

Output Parameter

fact -the factored matrix

Notes

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().

References

Y. Saad, Iterative methods for sparse linear systems Philadelphia: Society for Industrial and Applied Mathematics, 2003

Level

developer

Location

src/mat/interface/matrix.c

Implementations