--- trunk/src/math/SquareMatrix3.hpp	2012/08/22 02:28:28	1782
+++ trunk/src/math/SquareMatrix3.hpp	2014/05/31 22:35:05	2000
@@ -35,7 +35,7 @@
  *                                                                      
  * [1]  Meineke, et al., J. Comp. Chem. 26, 252-271 (2005).             
  * [2]  Fennell & Gezelter, J. Chem. Phys. 124, 234104 (2006).          
- * [3]  Sun, Lin & Gezelter, J. Chem. Phys. 128, 24107 (2008).          
+ * [3]  Sun, Lin & Gezelter, J. Chem. Phys. 128, 234107 (2008).          
  * [4]  Kuang & Gezelter,  J. Chem. Phys. 133, 164101 (2010).
  * [5]  Vardeman, Stocker & Gezelter, J. Chem. Theory Comput. 7, 834 (2011).
  */
@@ -125,7 +125,7 @@ namespace OpenMD {
      * Sets this matrix to a rotation matrix by three euler angles
      * @param phi
      * @param theta
-     * @psi theta
+     * @param psi
      */
     void setupRotMat(Real phi, Real theta, Real psi) {
       Real sphi, stheta, spsi;
@@ -569,6 +569,9 @@ namespace OpenMD {
   typedef SquareMatrix3<RealType> Mat3x3d;
   typedef SquareMatrix3<RealType> RotMat3x3d;
 
+  const Mat3x3d M3Zero(0.0);
+
+
 } //namespace OpenMD
 #endif // MATH_SQUAREMATRIX_HPP