Fix typo.

git-svn-id: https://svn.dealii.org/trunk@32893 0785d39b-7218-0410-832d-ea1e28bc413d

diff --git a/deal.II/examples/step-15/doc/intro.dox b/deal.II/examples/step-15/doc/intro.dox
index 2cebf0f9f1ff4ef3900336a49575d7cdaefa32ab..099982af18dbee6aa373a990c7d2bde8035d02d7 100644 (file)
--- a/deal.II/examples/step-15/doc/intro.dox
+++ b/deal.II/examples/step-15/doc/intro.dox
@@ -47,7 +47,7 @@ $\Omega$ is the domain we get by projecting the wire's positions into $x-y$
 space. In this example, we choose $\Omega$ as the unit disk.
 
 As described above, we solve this equation using Newton's method in which we
-compute the $n$th approximate solution from the $n-1$st one, and use
+compute the $n$th approximate solution from the $n$th$-1$ one, and use
 a damping parameter $\alpha^n$ to get better global convergence behavior:
   @f{align*}
     F'(u^{n},\delta u^{n})&=- F(u^{n})