# MatCholeskyFactorNumeric
Performs numeric Cholesky factorization of a symmetric matrix. Call this routine after first calling `MatGetFactor()` and `MatCholeskyFactorSymbolic()`. 
## Synopsis
```
#include "petscmat.h" 
PetscErrorCode MatCholeskyFactorNumeric(Mat fact, Mat mat, const MatFactorInfo *info)
```
Collective on fact


## Input Parameters

- ***fact -*** the factor matrix obtained with `MatGetFactor()`
- ***mat -*** the initial matrix
- ***info -*** options for factorization
- ***fact -*** the symbolic factor of mat



## Note
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 f90
interface definition cannot be generated correctly [due to `MatFactorInfo`]


## See Also
 [Matrix Factorization](sec_matfactor), `MatFactorInfo`, `MatGetFactor()`, `MatCholeskyFactorSymbolic()`, `MatCholeskyFactor()`, `MatLUFactorNumeric()`

## Level
developer

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/interface/matrix.c.html#MatCholeskyFactorNumeric">src/mat/interface/matrix.c</A>

## Implementations

<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/impls/aij/mpi/clique/clique.cxx.html#MatCholeskyFactorNumeric_SparseElemental">MatCholeskyFactorNumeric_SparseElemental in src/mat/impls/aij/mpi/clique/clique.cxx</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/impls/aij/seq/aijfact.c.html#MatCholeskyFactorNumeric_SeqAIJ">MatCholeskyFactorNumeric_SeqAIJ in src/mat/impls/aij/seq/aijfact.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/impls/aij/seq/seqcusparse/aijcusparse.cu.html#MatCholeskyFactorNumeric_SeqAIJCUSPARSE">MatCholeskyFactorNumeric_SeqAIJCUSPARSE in src/mat/impls/aij/seq/seqcusparse/aijcusparse.cu</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/impls/aij/seq/seqhipsparse/aijhipsparse.hip.c.html#MatCholeskyFactorNumeric_SeqAIJHIPSPARSE">MatCholeskyFactorNumeric_SeqAIJHIPSPARSE in src/mat/impls/aij/seq/seqhipsparse/aijhipsparse.hip.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/impls/dense/seq/dense.c.html#MatCholeskyFactorNumeric_SeqDense">MatCholeskyFactorNumeric_SeqDense in src/mat/impls/dense/seq/dense.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/impls/elemental/matelem.cxx.html#MatCholeskyFactorNumeric_Elemental">MatCholeskyFactorNumeric_Elemental in src/mat/impls/elemental/matelem.cxx</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/impls/sbaij/seq/cholmod/sbaijcholmod.c.html#MatCholeskyFactorNumeric_CHOLMOD">MatCholeskyFactorNumeric_CHOLMOD in src/mat/impls/sbaij/seq/cholmod/sbaijcholmod.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/mat/impls/scalapack/matscalapack.c.html#MatCholeskyFactorNumeric_ScaLAPACK">MatCholeskyFactorNumeric_ScaLAPACK in src/mat/impls/scalapack/matscalapack.c</A><BR>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/mat/interface/matrix.c)


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