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