Dr. Harendra Singh is an assistant professor in the Department of Mathematics, Post-Graduate College, Ghazipur-233001, Uttar Pradesh, India. He has listed in top 2% scientist list published by Stanford University. His area of interest is mathematical modelling, fractional differential equations, integral equations, calculus of variations, analytical and numerical methods. His works have been published in applied mathematics and computations, applied mathematical modelling, applied numerical mathematics, Chaos Solitons & Fractals, numerical methods for partial differential equations, physica A, astrophysics and space science, Electronic Journal of Differential Equations, Few Body-system and several other peer-reviewed international journals. His 50 research papers have been published in various journals of repute with h-index of 22 and i10 index 31. He has delivered lectures in a number of national and international conferences and workshop. He has also attended short-terms programsand workshops.   Dr. Hemen Dutta is serving Gauhati University, India, regularly as a faculty member since 2010. Prior to joining Gauhati University, he served three other academic institutions in different capacities. He is currently interested in applied analysis and mathematical modelling. He has over 170 publications in the forms of research papers, book chapters and proceedings papers and serving as an editor of several SCI/SCIE and Scopus indexed journals as well as book series editor of top-class publishers like Elsevier and Taylor & Francis. He has to his credit several authored and edited books and conference proceedings published by reputed publishers like Springer, Birkhauser, Wiley, Taylor & Francis, Elsevier, etc. He is a selected member as well as life member of some academies and societies. He is the recipient of several grants, research projects and holding some honorary positions at foreign and national university/institution.