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• Current address : Uday Chand De,, Department of Pure Mathematics,, Calcutta University ,, Kol , Krishnendu De, Konnagar High School(H.S.),, 68 G.T. Road (West),Konnagar,Hooghly, Pin.712235, West Bengal, INDIA. Road, ,West Bengal, INDIA.
• E-mail address : uc_de@yahoo.com, krishnendu_de@yahoo.com URL: http://communications.science.ankara.edu.tr/index.php?series=A1