Department of Mathematical Sciences, Loyola University New Orleans, New Orleans, LA, USA
Department of Mathematical Sciences, Rensselaer Polytechnic Institute, Troy, NY, USA
Copyright © 2016 Jeremy J. Thibodeaux, Michael Hennessey et al. This is
an open access article distributed under the Creative Commons Attribution
License, which permits unrestricted use, distribution, and reproduction in any
medium, provided the original work is properly cited.