Dr. VAKEEL AHMAD KHAN is an Associate Professor in the department of Mathematics, Aligarh Muslim University, Aligarh, India. Dr Khan has successfully guided 15 Ph.D. and 4 M.Phil. students. He has authored two textbooks entitled Basics of Functional Analysis and Basics of Differential Equations published by Alpha Science International Ltd. Oxford, U.K. and Narosa Publishing House Pvt. Ltd. He has published more than 150 research papers in reputed International Journals, including Information Sciences (Elsevier) SCIE (Impact factor: 5.524), Applied Mathematics Letters (Elsevier) SCIE (Impact factor:3.848), Soft Computing (Springer-Verlag) SCIE (Impact factor:3.643), Journal of Inequalities and Applications(Springer-Verlag) SCIE (Impact factor: 2.491), Advances in Difference Equations (Springer-Verlag) SCIE (Impact factor:2.421), Ricerche di Matematica (Springer-Verlag) SCIE (Impact factor:1.034), Applied Mathematics A Journal of Chinese Universities and Springer-Verlag (CHINA) SCIE (Impact factor: 0.806), Numerical Functional analysis and Optimization (Taylor’s and Francis) SCIE (Impact Factor :1.212) etc. Dr Khan is also associated with Mathematical Reviews (USA) as a Reviewer.