Mention step-67 in header

diff --git a/doc/doxygen/headers/matrixfree.h b/doc/doxygen/headers/matrixfree.h
index e7e75ef9f167fce0f27b0c727e440c8a26e8be87..becd712f5b73eed6c343777ed68a6ebadb97fa8e 100644 (file)
--- a/doc/doxygen/headers/matrixfree.h
+++ b/doc/doxygen/headers/matrixfree.h
@@ -120,8 +120,8 @@ digraph G
  * science education, including most of the deal.II developers, because it
  * appears to be wasteful to re-compute integrals over and over again, instead
  * of using precomputed data. However, as the tutorial programs step-37,
- * step-48, and step-59 show, these concepts usually outperform traditional
- * algorithms on modern computer architectures.
+ * step-48, step-59, step-64, and step-67 show, these concepts usually
+ * outperform traditional algorithms on modern computer architectures.
  *
  * The two main reasons that favor matrix-free computations are the
  * following: