Explain what we are seeing.

git-svn-id: https://svn.dealii.org/trunk@22985 0785d39b-7218-0410-832d-ea1e28bc413d

diff --git a/deal.II/examples/step-38/doc/results.dox b/deal.II/examples/step-38/doc/results.dox
index 5e5bee9ba12faa5b3b1b32aa8eb526266d44774a..a3eda5aec014d3c236e8575bbaec2223752eb6f2 100644 (file)
--- a/deal.II/examples/step-38/doc/results.dox
+++ b/deal.II/examples/step-38/doc/results.dox
@@ -20,8 +20,16 @@ H1 error = 0.00552639
 @endverbatim
 
 This is what we expect: make the mesh size smaller by a factor of two and the
-error goes down by a factor of four (***HM, SHOULDN'T IT BE A FACTOR OF
-TWO???***)
+error goes down by a factor of four (remember that we use bi-quadratic
+elements). The full sequence of errors from one to five refinements looks like
+this, neatly following the theoretically predicted pattern:
+@verbatim
+0.360759
+0.0888008
+0.0221245
+0.00552639
+0.0013813
+@endverbatim
 
 Finally, the program produces graphical output that we can visualize. Here is
 a plot of the results: