in S which converges to q. Corollary 1 Every point in the boundary of a set S is simultaneously the limit of a convergin
Posted: Thu Jun 30, 2022 7:41 pm
in S which converges to q. Corollary 1 Every point in the boundary of a set S is simultaneously the limit of a converging sequence of points in S and a converging sequence of points in the complement of S. For, by item (viii) in the list of basic topological facts (1-29), bdy(S) is the intersection of the closure of S and the closure of the complement of S. Corollary 2 A ser S is closed if and only if it contains the limit of every converging sequence (p) whose terms lie in S.