Fixed some typos.

git-svn-id: http://svn.cactuscode.org/arrangements/CactusBase/Boundary/trunk@163 6a38eb6e-646e-4a02-a296-d141613ad6c4

1 files changed, 4 insertions, 4 deletions

diff --git a/doc/documentation.tex b/doc/documentation.tex
index 997487e..25c808b 100644
--- a/doc/documentation.tex
+++ b/doc/documentation.tex
@@ -302,14 +302,14 @@ At a given boundary only the derivatives in the normal direction are
 considered.  Notice that $u(r-vt)$ has disappeared, but we still do 
 not know the value of $H$.
 
-To get $H$ we do is the following:  The expression is evaluated one 
-point in from the boundary and solved for $H$ there. Now need a way of 
-extrapolating $H$ to the boundary is required. For this, assume that 
+To get $H$ we do the following:  The expression is evaluated one 
+point in from the boundary and solved for $H$ there. Now we need a way of 
+extrapolating $H$ to the boundary. For this, assume that 
 $H$ falls off as a power law:
 \begin{equation}
 H = \frac{k}{r^n} \qquad \mbox{which gives} \qquad d_i H  =  - n \frac{H}{r}
 \end{equation}
-The value of $n$ is is defined by the parameter {\tt radpower}.
+The value of $n$ is defined by the parameter {\tt radpower}.
 If this parameter is negative, $H$ is forced to be zero (this
 corresponds to pure outgoing waves and is the default).