ThmDex – An index of mathematical definitions, results, and conjectures.
Set of symbols
Alphabet
Deduction system
Theory
Zermelo-Fraenkel set theory
Set
Subset
Power set
Hyperpower set sequence
Hyperpower set
Hypersubset
Subset algebra
Topology
Set of topologies
Generated topology
Metric topology
Metrisable topological space
Completely metrisable topological space
Definition D2299
Polish topological space
Formulation 0
A D1106: Topological space $T = (X, \mathcal{T})$ is a Polish topological space if and only if
(1) $T$ is a D2298: Completely metrisable topological space
(2) $T$ is a D99: Separable topological space