# DMTSCreateRHSMassMatrix
This creates the mass matrix associated with the given DM, and a solver to invert it, and stores them in the DMTS context. 
## Synopsis
```
#include "petscts.h" 
PetscErrorCode DMTSCreateRHSMassMatrix(DM dm)
```
Collective on dm


## Input Parameters

- ***dm   -*** DM providing the mass matrix


Note: The idea here is that an explicit system can be given a mass matrix, based on the DM, which is inverted on the RHS at each step.




## See Also
 `DMTSCreateRHSMassMatrixLumped()`, `DMTSDestroyRHSMassMatrix()`, `DMCreateMassMatrix()`, `DMTS`

## Level
developer

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/utils/dmlocalts.c.html#DMTSCreateRHSMassMatrix">src/ts/utils/dmlocalts.c</A>

## Examples
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/tutorials/ex45.c.html">src/ts/tutorials/ex45.c.html</A><BR>


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


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