Use math syntax in two places.

diff --git a/9.0/paper.tex b/9.0/paper.tex
index 1d8a807d06be3ddfa601759e7ad8d764010a6f1a..9c954faa5f9ec928e7b706f8a90b76e9f8360fe5 100644 (file)
--- a/9.0/paper.tex
+++ b/9.0/paper.tex
@@ -149,7 +149,7 @@ The major changes of this release are:
   Laplace-style smoothing to a transfinite interpolation that linearly
   blends between the descriptions on the faces around a cell. The old
   transformation introduced boundary layers inside cells that prevented
-  convergence rates from exceeding 3.5 in the global L2 errors on typical
+  convergence rates from exceeding \(3.5\) in the global \(L^2\) errors on typical
   settings. This change also considerably improves mesh quality on settings
   where curved descriptions are only applied to the boundary rather than
   the whole volume.