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# MatLMVMSetJ0KSP
Allows the user to provide a pre-configured KSP solver for the initial inverse-Jacobian approximation. This `KSP` solver should already contain all the operators necessary to perform the inversion. The LMVM-type matrix only calls `KSPSolve()` without changing any other options. 
## Synopsis
```
#include "petscksp.h" 
PetscErrorCode MatLMVMSetJ0KSP(Mat B, KSP J0ksp)
```

## Input Parameters

- ***B -*** An LMVM-type matrix
- ***J0ksp -*** `KSP` solver for the initial inverse-Jacobian application





## See Also
 [](ch_ksp), [LMVM Matrices](sec_matlmvm), `MATLMVM`, `MatLMVMGetJ0KSP()`

## Level
advanced

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/ksp/utils/lmvm/lmvmutils.c.html#MatLMVMSetJ0KSP">src/ksp/ksp/utils/lmvm/lmvmutils.c</A>


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


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