Skip to content
Competitive Stats
Q56Section II (Mathematics)56 of 180

A KK-topology-style refinement — Hausdorff, but not regular

Consider the space R\mathbf R with the topology induced by the open base {u/u=(a,b)\{u/u=(a,b) or (a,b)∖F}(a,b)\setminus F\} where F={yn/n∈N}F=\{y_n/n\in\mathbf N\}. The space R\mathbf R with this topology is:

Options

Pick an option to check your answer.