This book is written for postgraduate students of Mathematics (specially) pursuing PG with Dissertation/ Project. The current book is a collective effort of Semester 4, 2021-23 students pursuing M.Sc. degree course in Mathematics from Chatra College, Chatra (a constituent unit of Vinoba Bhave University, Hazaribag, Jharkhand). The book comprises their dissertations as chapters. This is required for fulfillment of their degree course. The dissertations were prepared on their own as per the topics allotted.
