HEMEN DUTTA is Assistant Professor at the Department of Mathematics, Gauhati University, Guwahati, India. He completed his PhD in mathematics from Gauhati University. He has to his credit 10 books and over 100 items as research papers and chapters in books published by leading publishers. He is member of noted scientific societies and has visited several foreign institutions with regards to research collaborations, conferences and delivering talks. His main research interests are summability theory, functional equations, fixed point theory and mathematical modelling.