PETSc version 3.17.4
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# MatICCFactor

Performs in-place incomplete Cholesky factorization of matrix.

### Synopsis

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

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

### See Also

MatICCFactorSymbolic(), MatLUFactorNumeric(), MatCholeskyFactor()

Developer Note: fortran interface is not autogenerated as the f90 interface definition cannot be generated correctly [due to MatFactorInfo]

### Level

developer

### Location

src/mat/interface/matrix.c

### Implementations

MatICCFactor_SeqSBAIJ in src/mat/impls/sbaij/seq/sbaij.c
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