# MatFactorFactorizeSchurComplement
Factorize the Schur complement matrix computed during the factorization step 
## Synopsis
```
#include "petscmat.h" 
PetscErrorCode MatFactorFactorizeSchurComplement(Mat F)
```
Logically Collective


## Input Parameters

- ***F -*** the factored matrix obtained by calling `MatGetFactor()`



## Note
Must be called after `MatFactorSetSchurIS()`




## See Also
 `MatGetFactor()`, `MatFactorSetSchurIS()`, `MatFactorInvertSchurComplement()`

## Level
advanced

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


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


[Index of all Mat routines](index.md)  
[Table of Contents for all manual pages](/docs/manualpages/index.md)  
[Index of all manual pages](/docs/manualpages/singleindex.md)  
