Affiliation: | 1. Department of Mathematics, Jadavpur University, Kolkata 700 032, West Bengal, India;2. Department of Mathematics, North Bengal University, Siliguri 734013, West Bengal, India;3. High Energy and Cosmic Ray Research Centre, University of North Bengal, Siliguri, WB 734013, India;4. Department of Physics, Netaji Nagar College for Women, Regent Estate, Kolkata 700092, India;5. Department of Physics, Government Training College, Hooghly 712103, West Bengal, India |