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# PCHPDDMSetRHSMat
Sets the right-hand side matrix used by `PCHPDDM` for the concurrent GenEO problems at the finest level. Must be used in conjunction with `PCHPDDMSetAuxiliaryMat`(N), so that Nv = lambda Bv is solved using `EPSSetOperators`(N, B). It is assumed that N and B are provided using the same numbering. This provides a means to try more advanced methods such as GenEO-II or H-GenEO. 
## Synopsis
```
#include "petscpc.h" 
PetscErrorCode PCHPDDMSetRHSMat(PC pc, Mat B)
```

## Input Parameters

- ***pc -*** preconditioner context
- ***B -*** right-hand side sequential matrix





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

## Level
advanced

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

## Implementations

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


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


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