Comprehensive Mathematics for JEE Advanced 2019 About the Author Name:- Prof. Ajay Kumar, Dept. of Mathematics (HOD), University of Delhi, 28 Yrs of Teaching Experience. Name:- Dr. Ravi Prakash (Associate Prof. in Mathematics, Gold Medallist), Dept. of Mathematics, Rajdhani College, University of Delhi, 30 Yrs of Teaching Experience. Name:- Ms. Usha Gupta, Dept. of Mathematics, Deshbandhu College, University of Delhi.