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
Definition D3369
Subset structure
Formulation 0
An D548: Ordered pair $S = (X, \mathcal{S})$ is a subset structure if and only if
(1) $X$ is a D11: Set
(2) $\mathcal{S} \subseteq \mathcal{P}(X)$ (D3367: Subset algebra)
Children
Measurable space
Top subset structure of natural numbers
Topological space