1. Micheal, O. Searcoid, Metric Spaces, Springer, 2007 2. E. Kreyszig, Introduction to Functional Analysis with Applications, John Wiley and Sons, 1978 3. W.A. Sutherland, Introduction to Metric and Topological Spaces, Clarendon Press Oxford, 1975 4. E.T. Copson, Metric Spaces, Cambridge University, Press, 1968 5. G.F. Simmons, Introduction to Topology and Modern Analysis, McGraw Hill Company, 1963 6. I.N. Herstein, Topics in Algebra, Xerox Publishing Company, 1964. 7. Vivek Sahai and Vikas Bist, Algebra, Narosa Publishing House, 1999 8. P.B. Bhattacharya, S.K. Jain and S.R. Nagpaul, Basic Abstract Algebra, C.U.P.,
1986

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