Dr. Chaitanya Kumar is an Associate Professor, Department of Mathematics, Delhi College of Arts and Commerce, University of Delhi. He has been teaching mathematics for the last thirty seven years. Dr. Chaitanya Kumar received his Doctorate degree in Mathematics from the University of Delhi. He has published several research papers in the area of Boundary Value problems by Integral equation techniques in reputed national and international journals. He has been Research Supervisor at Post Graduate and higher levels. He has authored important books on mathematics: “Essentials of Mathematics for Business Studies”, “Mathematics for M.C.A. Entrance Examination”, “Basic Research Methods and Statistics for Social Sciences”, “Theory of Analytic Geometry and Applied Algebra”.