\begin{document}
This tutorial program is another one in the series on the elasticity problem
-that we have already started with step-8 and step-17. It extends it into
-two different directions: first, it solves the quasistatic but time
-dependent elasticity problem for large deformations with a Lagrangian mesh
-movement approach. Secondly, it shows some more techniques for solving such
-problems using parallel processing with PETSc's linear algebra; however, as
-before in step-17, the program runs just as fine on a single sequential
-machine as long as you have PETSc installed. Finally, a good number of
-assorted improvements and techniques are demonstrated that have not been shown
-yet in previous programs.
+that we have already started with step-8 and step-17. It extends it into two
+different directions: first, it solves the quasistatic but time dependent
+elasticity problem for large deformations with a Lagrangian mesh movement
+approach. Secondly, it shows some more techniques for solving such problems
+using parallel processing with PETSc's linear algebra; however, as before in
+step-17, the program runs just as fine on a single sequential machine as long
+as you have PETSc installed. In addition to this, we show how to work around
+the main bottleneck of step-17, namely there that we only generated graphical
+output from one process, and that this scaled very badly with larger numbers
+of processes and on large problems. Finally, a good number of assorted
+improvements and techniques are demonstrated that have not been shown yet in
+previous programs.
\end{document}