Affiliation: | 1. Department of Mathematics, Jadavpur University, Kolkata, 700 032, West Bengal, India 2. Department of Mathematics, Saroj Mohan Institute of Technology, Guptipara, West Bengal, India 3. Department of Mathematics, Krishnagar Women’s College, Arobinda Sarani, Krishnanagar, Nadia, 741101, West Bengal, India
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