JIM MICHAEL CUSHING is professor in the Department of Mathematics and member of the Interdisciplinary Program in Applied Mathematics at the University of Arizona, Tucson, U.S.A. His professional interests include discrete and continuous dynamic systems and applications in population, ecological and evolutionary biology. He is a fellow of the American Mathematical Society, editor-in-chief of the Journal of Biological Dynamics and ... Read morepast president of the International Society of Difference Equations. He is also the Alexander von Humboldt Fellow.  MOHAMMAD SALEEM is professor and chairman of the Department of Applied Mathematics, Aligarh Muslim University, India. He did his PhD from the Indian Institute of Technology Kanpur, India, in 1980. His main area of research is mathematical modelling of ecological problems. He has published numerous papers on elasticity in several journals of international repute. His current research interests include cancer growth models. He is a life member of the Indian Society for Mathematical Modelling & Computer Simulation. HARI MOHAN SRIVASTAVA has held the position of Professor Emeritus in the Department of Mathematics and Statistics at the University of Victoria in Canada since 2006. Prior to this, he was professor in the same department from 1974 to 2006 and associate professor in the same department from 1969 to 1974. He has held numerous visiting research and honorary chair positions at many universities and research Institutes in different parts of the world. He is also actively associated editorially with numerous international scientific research journals. His current research interests include several areas of pure and applied mathematical sciences such as real and complex analysis, fractional calculus and its applications, integral equations and transforms, higher transcendental functions and their applications, q-series and q-polynomials, analytic number theory,analytic and geometric inequalities, probability and statistics, and inventory modelling and optimization. He has published 25 books, monographs and edited volumes, 30 book and encyclopaedia chapters, 45 papers in international conference proceedings, and more than 1,000 scientific research journal articles, as well as written forewords and prefaces to many books and journals. He is currently listed as the 2015 Thomson-Reuters Highly Cited Researcher.  MUMTAZ AHMAD KHAN is dean of the Faculty of Engineering & Technology and professor in the Department of Applied Mathematics, Aligarh Muslim University, India. He did both his M.Sc. and PhD from Lucknow University in 1970 and 1978, respectively. He has 150 research papers to his credit published in several international journals of repute. He has successfully guided 17 PhD and 12 M.Phil students. He is in the editorial board of International Transactions in Mathematical Sciences and Computer. He is a reviewer with American Mathematical Review. His current research interests include discrete complex analysis, fractional calculus and its application, integral equations and transforms, higher transcendental functions and their applications, q­-series, q­polynomials and umbral calculus. MERAJUDDIN is professor in the Department of Applied Mathematics, Aligarh Muslim University, India. He did both his M.Sc. and PhD from the Indian Institute of Technology Kanpur, India, in 1978 and 1985, respectively. His research interests include graph theory and discrete mathematics. Show Less