Kolmogorov space
From Conservapedia
A Kolmogorov space (or T0 spaces) is a topological space X in wich for any two points a, b, there is an open set U such that and or and .
A Kolmogorov space (or T0 spaces) is a topological space X in wich for any two points a, b, there is an open set U such that and or and .