:orphan:
# PCHPDDMHasNeumannMat
Informs `PCHPDDM` that the `Mat` passed to `PCHPDDMSetAuxiliaryMat()` is the local Neumann matrix. 
## Synopsis
```
#include "petscpc.h" 
PetscErrorCode PCHPDDMHasNeumannMat(PC pc, PetscBool has)
```

## Input Parameters

- ***pc -*** preconditioner context
- ***has -*** Boolean value





## Notes
This may be used to bypass a call to `MatCreateSubMatrices()` and to `MatConvert()` for `MATSBAIJ` matrices.

If a `DMCreateNeumannOverlap()` implementation is available in the `DM` attached to the Pmat, or the Amat, or the `PC`, the flag is internally set to `PETSC_TRUE`. Its default value is otherwise `PETSC_FALSE`.


## See Also
 `PCHPDDM`, `PCHPDDMSetAuxiliaryMat()`

## Level
intermediate

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/pc/impls/hpddm/pchpddm.cxx.html#PCHPDDMHasNeumannMat">src/ksp/pc/impls/hpddm/pchpddm.cxx</A>

## Examples
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/ksp/tutorials/ex76.c.html">src/ksp/ksp/tutorials/ex76.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/ksp/tutorials/ex76f.F90.html">src/ksp/ksp/tutorials/ex76f.F90</A><BR>

## Implementations

<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ksp/pc/impls/hpddm/pchpddm.cxx.html#PCHPDDMHasNeumannMat_HPDDM">PCHPDDMHasNeumannMat_HPDDM in src/ksp/pc/impls/hpddm/pchpddm.cxx</A><BR>


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


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