Department of Basic Science Narula Institute of Technology Agarpara Kolkata-700109 IndiaDepartment of Mathematics Indian Institute of Engineering Science and Technology Shibpur Howrah-711103 India;
Department of Applied Science Maulana Abul Kalam Azad University of Technology West Bengal Haringhata Nadia West Bengal India;
Department of Mathematics Indian Institute of Engineering Science and Technology Shibpur Howrah-711103 India;
Mahadevnagar High School Maheshtala Kolkata 700141 West Bengal India;