# PCFieldSplitSchurRestoreS
returns the `MATSCHURCOMPLEMENT` matrix used by this `PC` 
## Synopsis
```
#include "petscpc.h" 
PetscErrorCode PCFieldSplitSchurRestoreS(PC pc, Mat *S)
```
Not collective


## Input Parameters

- ***pc      -*** the preconditioner context
- ***S       -*** the Schur complement matrix





## See Also
 [](sec_block_matrices), `PC`, `PCFieldSplitGetSubKSP()`, `PCFIELDSPLIT`, `PCFieldSplitSchurPreType`, `PCFieldSplitSetSchurPre()`, `MatSchurComplement`, `PCFieldSplitSchurGetS()`

## Level
advanced

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/pc/impls/fieldsplit/fieldsplit.c.html#PCFieldSplitSchurRestoreS">src/ksp/pc/impls/fieldsplit/fieldsplit.c</A>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/ksp/pc/impls/fieldsplit/fieldsplit.c)


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