Tag: closure

• Topological Spaces: What Remains of Nearness When the Metric Is DiscardedOpen sets in a metric space satisfy three properties; taking them as axioms we define topological spaces, build the discrete, order and Zariski topologies, and prove the basic laws of closure.MathematicsGeneral TopologyGraduatetopological spaceopen setsmetric spaceclosureneighbourhood~24 min