Dr. Harendra Singh is an Assistant Professor in the Department of Mathematics, Post-Graduate College, Ghazipur-233001, Uttar Pradesh, India. He holds a Ph.D. in Mathematics from Indian Institute of Technology (BHU), Varanasi, India. He has qualified GATE, JRF and NBHM in Mathematics. He is also awarded by post-doctoral fellowship (PDF) in Mathematics from National Institute of Science Education and Research (NISER) Bhubaneswar Odisha, India. His research is widely published. He edited, "Methods of Mathematical Modelling Fractional Differential Equations," published by CRC Press. Dr. H. M. Srivastava is a Professor Emeritus, Department of Mathematics and Statistics, University of Victoria, British Columbia V8W 3R4, Canada. He holds a Ph.D. from Jai Narain Vyas University of Jodhpur in India. He has held numerous Visiting, Honorary and Chair Professorships at many universities and research institutes in di¿erent parts of the world. He is also actively associated with numerous international journals as an Professor Srivastava's research interests include several areas of pure and applied mathematical sciences. He has published 36 books and more than 1350 peer-reviewed journal articles. Dr. Juan J. Nieto is a Professor, University of Santiago de Compostela, ES-15782 Santiago de Compostela, Spain. Professor Nieto's research interests include several areas of pure and applied mathematical sciences. He has published many books, monographs, and edited volumes, and more than 650 peer-reviewed international scienti¿c research journal articles. Professor Nieto has held numerous Visiting and Honorary Professorships. He is also actively associated editorially with numerous journals.
