Paul Bracken is a professor in the Department of Mathematics at the University of Texas Rio Grande Valley, Edinburg, USA. He received a BSc from the University of Toronto and a Ph.D. from the University of Waterloo, Canada. His research interests include applications of differential geometry and partial differential equations to problems in mathematical physics, as well as problems in quantum mechanics and quantum field theory. He has published well over 200 research papers in journals and books and presented talks at numerous meetings and conferences. He is also a member of many societies, including the AMS, CMS, and APS. He has already edited 9 volumes in association with IntechOpen.