g multigrid solver on 4 processors with 9 multigrid levels
    <pre>
     mpiexec -n 4 ./ex50 -da_grid_x 1025 -da_grid_y 1025 -pc_type mg -pc_mg_levels 9 -ksp_monitor     <a href="https://www.mcs.anl.gov/petsc/petsc-current/src/ksp/ksp/tutorials/output/ex50_tut_3.out">[Expected output]</a>
    </pre>
  </l>
</ul>
</div>

<div id="example2">
<h2>Example 2: Nonlinear ODE arising from a time-dependent one dimensional PDE</h2>

<p>WHAT THIS EXAMPLE DEMONSTRATES:</p>
<ul>
  <li>Using command line options</li>
  