Jerome V. Maloney is Professor of Mathematics and Optical Sciences at the University of Arizona.Alan C. Newell is Professor of Mathematics, Research Professor of Arizona Research labouratories, University of Arizona. He is co-founder and editor of Physica D, Nonlinear Phenomena, a leading journal in the field. Jerome V. Maloney is Professor of Mathematics and Optical Sciences at the University of Arizona.Alan C. Newell is Professor of Mathematics, Research Professor of Arizona Research labouratories, University of Arizona. He is co-founder and editor of Physica D, Nonlinear Phenomena, a leading journal in the field.