# Unstructured Grids and Cell Complexes (DMPLEX)

The `DMPLEX` subclass of `DM` encapsulates an unstructured mesh, with interfaces for both topology and geometry. It is capable of parallel refinement and coarsening
(using Pragmatic or ParMmg) and parallel redistribution for load balancing. It is designed to interface with the `PetscFE` and `PetscFV` trial discretization objects.

<ul>
  <li><a href="http://arxiv.org/abs/0908.4427">Mesh Algorithms for PDE with Sieve I: Mesh Distribution</a>, Matthew G. Knepley and Dmitry A. Karpeev, Scientific Programming, <b>17</b>(3), 215-230, 2009.</li>
  <li><a href="http://arxiv.org/abs/1506.07749">Efficient mesh management in Firedrake using PETSc-DMPlex</a>, Michael Lange, Lawrence Mitchell, Matthew G. Knepley and Gerard J. Gorman, SISC, <b>38</b>(5), S143-S155, 2016.</li>
  <li><a href="http://arxiv.org/abs/1506.06194">Unstructured Overlapping Mesh Distribution in Parallel</a>, Matthew G. Knepley, Michael Lange, Gerard J. Gorman, 2015.</li>
</ul>

<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/dm/impls/plex/tutorials/index.html">Examples</A><BR>