10:24x is a limit point of a subset A of a metric space X iff distance between x and A difference {x} isDoney Kurian537 views·4 years ago
23:33Subset of a metric space is closed iff it contains all its limit pointe and convergence of a sequencDoney Kurian265 views·4 years ago
28:02Characteristic of the class of open sets and class of closed setsDoney Kurian95 views·4 years ago