Affiliation: | 1.Department of Mathematics, Gandhigram Rural Institute - Deemed University, Gandhigram, Tamil Nadu, 624302, India ;2.Department of Science and Humanities-Mathematics, Karpagam University, Coimbatore, 641021, India ;3.School of Mathematical Sciences and Institute of Finance and Statistics, Nanjing Normal University, Nanjing, 210023, Jiangsu, China ;4.Department of Mathematics, University of Bielefeld, 33615, Bielefeld, Germany ;5.Department of Mathematics, Faculty of Science, Maejo University, Chiang Mai, 50290, Thailand ; |