step-66

diff --git a/9.3/paper.tex b/9.3/paper.tex
index c748997c37054c6b7d3cb66d027a945974a8087e..56273068a48060b2b27d5dd17c0dde78f34e7113 100644 (file)
--- a/9.3/paper.tex
+++ b/9.3/paper.tex
@@ -1057,7 +1057,8 @@ ways as part of this release. In addition, there are a number of new tutorial pr
   charged particles and an electric field, using a cathode tube as an
   example.
 
-\item \texttt{step-66} nonlinear matrix-free solver \todo[inline]{TODO}
+\item \texttt{step-66} shows how to solve a nonlinear problem using Newton's method in the matrix-free
+framework in parallel. The PDE considered is the Gelfand problem $-\triangle u = \exp(u)$.
   
 \item \texttt{step-68} is a demonstration of how to embed and distribute
   particles in a parallel triangulation. It tracks the movement of