The emergence of open sets, closed sets, and limit points in analysis and topology
Keywords: 01A55; 01A60; 51-03; 54-03; 57-03Open set; Closed set; Derived set; Closure of a set; Limit point of a set; L-space; Topological space; General topology; Bolzano–Weierstrass Theorem; Heine–Borel Theorem