#50: Add mesh tangling exercise

demos/monge_ampere1.py

@@ -117,6 +117,13 @@ def ring_monitor(mesh):
 #    :figwidth: 60%
 #    :align: center
 #
+# .. rubric:: Exercise
+#
+# To further convince yourself that there are no tangled elements, go back to the start
+# of the demo and set up a :class:`movement.tangling.MeshTanglingChecker` object using
+# the initial mesh. Use it to check for tangling after the mesh movement has been
+# applied.
+#
 # This tutorial can be dowloaded as a `Python script <monge_ampere1.py>`__.
 #
 #