1. Reg. No. 22211282092007, PG and Research Department of Mathematics, St. Xavier’s College (Autonomous), Palayamkottai, Affiliated to Manonmaniam Sundaranar University, Abishekapatti, Tirunelveli 627 012, Tamil Nadu, India
2. Department of Mathematics, St. Xavier’s College (Autonomous), Palayamkottai, Affiliated to Manonmaniam Sundaranar University, Abishekapatti, Tirunelveli 627 012, Tamil Nadu, India