Cofinality
Übersetzung von "cofinality" ins Russisch
cofinality
Substantivcofinality
cofinalities Pl.
The cofinality of a partially ordered set is an important concept in set theory.
Кофинальность частично упорядоченного множества является важным понятием в теории множеств.
Definitionen
cofinality
SubstantivIn set theory, the least ordinal α such that a partially ordered set (or ordinal) has an unbounded (cofinal) subset of order type α; equivalently, the minimal cardinality of a cofinal subset.
The cofinality of the ordinal ω is ω, because the natural numbers themselves form an unbounded subset of order type ω.