Polish set theorists

Polish set theory, often referred to in the context of Polish spaces, is a concept in set theory and topology that involves certain kinds of topological spaces known as Polish spaces. A Polish space is a separable completely metrizable topological space. This means that the space can be endowed with a metric (a way of measuring distances) such that it is both complete (every Cauchy sequence converges) and separable (contains a countable dense subset).