Department of Mathematics, Siksha ‘O’ Anusandhan University, Khandagiri, Bhubaneswar-751030, Odisha, India;
Department of Applied Sciences, Institute of Science and Technology, Gauhati University, Guwahati-781014, Assam,India;
Department of Mathematics, R G Baruah College, Guwahati-781025, Assam, India;
Physical Sciences Division, Institute of Advanced Study in Science and Technology, Vigyan Path, Paschim Boragaon,Garchuk, Guwahati-781035, Assam, India;
Physical Sciences Division, Institute of Advanced Study in Science and Technology, Vigyan Path, Paschim Boragaon,Garchuk, Guwahati-781035, Assam, India;
