O Searcoid, Micheal. Metric Spaces [electronic resource] / by Micheal O Searcoid. - London : Springer-Verlag London Limited, 2007. - xix, 304 p. : ill., digital ; 24 cm. - Springer Undergraduate Mathematics Series, 1615-2085 . ISBN: 9781846286278 (electronic bk.) 9781846283697 (paper) Subjects--Topical Terms: Metric spaces.Mathematics.Topology.Analysis.Functional Analysis.