1. Physical Sciences Division, Institute of Advanced Study in Science and Technology, Vigyan Path, Paschim Boragaon, Garchuk, Guwahati-781035, Assam, India
2. Department of Mathematics, Siksha Bhavana, Visva-Bharati University, Santiniketan-731235, India
3. Department of Applied Sciences, Institute of Science and Technology, Gauhati University, Guwahati-781014, Assam, India
4. Center for Applied Mathematics, Siksha ‘O’ Anusandhan University, Khandagiri, Bhubaneswar-751030, Odisha, India