# KSPFETIDPGetInnerKSP
Gets the `KSP` object for the Lagrange multipliers from inside a `KSPFETIDP` 
## Synopsis
```
#include <petscksp.h> 
PetscErrorCode KSPFETIDPGetInnerKSP(KSP ksp, KSP *innerksp)
```

## Input Parameters

- ***ksp -*** the `KSPFETIDP`
- ***innerksp -*** the `KSP` for the multipliers





## See Also
 [](chapter_ksp), `KSPFETIDP`, `MATIS`, `PCBDDC`, `KSPFETIDPSetInnerBDDC()`, `KSPFETIDPGetInnerBDDC()`

## Level
advanced

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/ksp/impls/fetidp/fetidp.c.html#KSPFETIDPGetInnerKSP">src/ksp/ksp/impls/fetidp/fetidp.c</A>

## Examples
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/ksp/tutorials/ex59.c.html">src/ksp/ksp/tutorials/ex59.c.html</A><BR>

## Implementations

<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/ksp/impls/fetidp/fetidp.c.html#KSPFETIDPGetInnerKSP_FETIDP">KSPFETIDPGetInnerKSP_FETIDP in src/ksp/ksp/impls/fetidp/fetidp.c</A><BR>


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


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