diff --git a/fastlib/u/rriegel/siam07_dm/nbc_siam07.tex b/fastlib/u/rriegel/siam07_dm/nbc_siam07.tex
index bdb508997f..550c1bb48d 100644
--- a/fastlib/u/rriegel/siam07_dm/nbc_siam07.tex
+++ b/fastlib/u/rriegel/siam07_dm/nbc_siam07.tex
@@ -615,7 +615,7 @@ ultimately yielding the expression
 \begin{equation}
   W(Z_k) \frac{D + 2}{2 V_D(h_k)} \left( 1 - \frac{\delta(x,Z_k)}{h_k^2} \right)
 \end{equation}
-in place of the original kernal summation, where
+in place of the original kernel summation, where
 \begin{align}
   \delta(x,Z_k) & = \lefteqn{\textstyle x \cdot x - 2x \cdot \frac{S(Z_k)}{W(Z_k)} + \frac{T(Z_k)}{W(Z_k)} ,} \\
   S(Z_k) & = \sum_{\leftlim{(z,w) \in Z_k}} w z , & T(Z_k) & = \sum_{\leftlim{(z,w) \in Z_k}} w z \cdot z ;