# PCLMVMGetMatLMVM
Returns a pointer to the underlying `MATLMVM` matrix. 
## Synopsis
```
#include "petscpc.h" 
PetscErrorCode PCLMVMGetMatLMVM(PC pc, Mat *B)
```

## Input Parameter

- ***pc -*** An `PCLMVM` preconditioner



## Output Parameter

- ***B -*** matrix inside the preconditioner, one of type `MATLMVM`, `MATLDFP`, `MATLBFGS`, `MATLSR1`, `MATLBRDN`, `MATLMBRDN`, `MATLSBRDN`





## See Also
 `PCLMVM`, `MATLMVM`, `MATLDFP`, `MATLBFGS`, `MATLSR1`, `MATLBRDN`, `MATLMBRDN`, `MATLSBRDN`, `PCLMVMSetMatLMVM()`

## Level
intermediate

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/pc/impls/lmvm/lmvmpc.c.html#PCLMVMGetMatLMVM">src/ksp/pc/impls/lmvm/lmvmpc.c</A>

## Examples
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/tao/unconstrained/tutorials/eptorsion1.c.html">src/tao/unconstrained/tutorials/eptorsion1.c.html</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/tao/unconstrained/tutorials/eptorsion3.c.html">src/tao/unconstrained/tutorials/eptorsion3.c.html</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/tao/unconstrained/tutorials/rosenbrock1.c.html">src/tao/unconstrained/tutorials/rosenbrock1.c.html</A><BR>


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


[Index of all PC routines](index.md)  
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