:orphan:
# DMPlexLandauCreateVelocitySpace
Create a DMPlex velocity space mesh 
## Synopsis
```
#include "petscdmplex.h" 
#include "petsclandau.h"   
PetscErrorCode DMPlexLandauCreateVelocitySpace(MPI_Comm comm, PetscInt dim, const char prefix[], Vec *X, Mat *J, DM *pack)
```
Collective


## Input Parameters
+   comm  - The MPI communicator
.   dim - velocity space dimension (2 for axisymmetric, 3 for full 3X + 3V solver)
-   prefix - prefix for options (not tested)


## Output Parameter
.   pack  - The DM object representing the mesh
+   X - A vector (user destroys)
-   J - Optional matrix (object destroys)



.keywords: mesh

## See Also
 `DMPlexCreate()`, `DMPlexLandauDestroyVelocitySpace()`

## Level
beginner

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/utils/dmplexlandau/plexland.c.html#DMPlexLandauCreateVelocitySpace">src/ts/utils/dmplexlandau/plexland.c</A>

## Examples
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/utils/dmplexlandau/tutorials/ex1.c.html">src/ts/utils/dmplexlandau/tutorials/ex1.c</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/utils/dmplexlandau/tutorials/ex1f90.F90.html">src/ts/utils/dmplexlandau/tutorials/ex1f90.F90</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/ts/utils/dmplexlandau/tutorials/ex2.c.html">src/ts/utils/dmplexlandau/tutorials/ex2.c</A><BR>


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


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