- Professor Gopal Nath Tiwari, from Ballia (UP), India, received his doctoral degree in 1976 from the Banaras Hindu University (B.H.U). Since then, he is working at the Centre for Energy Studies, IIT Delhi. During his lectures, at UG and PG level, in IIT Delhi and interactions with various students, he noticed that there was a dire need for clarification of several basic concepts associated with elementary mathematics. To his credit, he has published around 600 research papers, 25 books and supervised more than 80 Ph.D. students in renewable energy sources. He is a co-recipient of the âHari Om Ashram Prerit S.S.Bhatnagarâ Award in 1982. Neha Dimri completed her schooling from Bal Bharati Public School, GRH Marg, Delhi. Thereafter, she pursued her B.Tech in Computer Science and Engineering from Indira Gandhi Institute of Technology, Delhi and M.Tech in Software Engineering from Delhi Technological University. Currently, she is pursuing her Ph.D. from IIT, Delhi.