A.P. Dwivedi, Ph.D., is former Professor and Head, Department of Mathematics, Harcourt Butler Technological Institute, Kanpur. Earlier, he served as Acting Director at HBTI and Director MCA at BIT and RGGI, Meerut. Also, he has been a post-doctoral fellow of CSIR at IIT Kanpur. With more than four decades of teaching experience, he has published more than 100 research papers in national and international journals of repute. He is the life member of National Academy of Sciences, Bharat Ganita Parishad and Gwalior Academy of Mathematical Sciences. Dr. Dwivedi is recipient of Distinguished Service Award for his contribution to this subject and distinguished services rendered to Vijnana Parishad of India, and to the national development.