Minor adjustments.

git-svn-id: https://svn.dealii.org/trunk@21341 0785d39b-7218-0410-832d-ea1e28bc413d

diff --git a/deal.II/examples/step-39/doc/intro.dox b/deal.II/examples/step-39/doc/intro.dox
index ce485c67b2bb8fcc1fd600f8327b12810a90f05b..db0f8c6d350fbde6a41ee02a8506ec35f85e5bd8 100644 (file)
--- a/deal.II/examples/step-39/doc/intro.dox
+++ b/deal.II/examples/step-39/doc/intro.dox
@@ -49,9 +49,10 @@ for a face <i>F</i> of a cell <i>K</i>, compute the value
 \sigma_{F,K} = p(p+1) \frac{|F|_{d-1}}{|K|_d},
 @f]
 where <i>p</i> is the polynomial degree of the finite element
-functions and $|.|$ denotes the Hausdorff measure of the corresponding
-dimension of the object. If the face is at the boundary, choose $\sigma_F = \sigma_{F,K}$.
-For an interior face, take the average of the two values at this face.
+functions and $|\cdot|_d$ and $|\cdot|_{d-1}$ denote the $d$ and $d-1$
+dimensional Hausdorff measure of the corresponding
+object. If the face is at the boundary, choose $\sigma_F = \sigma_{F,K}$.
+For an interior face, we take the average of the two values at this face.
 
 In our finite element program, we distinguish three different
 integrals, corresponding to the sums over cells, interior faces and