ThmDex – An index of mathematical definitions, results, and conjectures.
▼ Set of symbols
▼ Alphabet
▼ Deduction system
▼ Theory
▼ Zermelo-Fraenkel set theory
▼ Set
▼ Transitive set
▼ Ordinal number
▼ Cardinal number
▼ Set cardinality
▼ Singleton set
Definition D3835
Duoton set
Formulation 0
A D11: Set $X$ is a duoton set if and only if \begin{equation} |X| = 2 \end{equation}
Children
▶ Trioton set