- cofinal subset
- мат.конфинальное подмножество
English-Russian scientific dictionary. 2008.
cofinal subset
Смотреть что такое "cofinal subset" в других словарях:
Cofinal (mathematics) — In mathematics, let A be a set and let ≤ be a binary relation on A. Then a subset B of A is said to be cofinal if it satisfies the following condition: For every a ∈ A, there exists some b ∈ B such that a ≤ b. This… … Wikipedia
cofinal — /koh fuyn l/, adj. Math. of or pertaining to a subset of a set with a partial order relation, as greater than or equal to, in which corresponding to each element in the set is an element in the subset that is in relation to the given element. [CO … Universalium
cofinal — /koh fuyn l/, adj. Math. of or pertaining to a subset of a set with a partial order relation, as greater than or equal to, in which corresponding to each element in the set is an element in the subset that is in relation to the given element. [CO … Useful english dictionary
Cofinality — Not to be confused with cofiniteness. In mathematics, especially in order theory, the cofinality cf(A) of a partially ordered set A is the least of the cardinalities of the cofinal subsets of A. This definition of cofinality relies on the axiom… … Wikipedia
Ordinal number — This article is about the mathematical concept. For number words denoting a position in a sequence ( first , second , third , etc.), see Ordinal number (linguistics). Representation of the ordinal numbers up to ωω. Each turn of the spiral… … Wikipedia
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Clubsuit — In mathematics, and particularly in axiomatic set theory, ♣S (clubsuit) is a family of combinatorial principles that are weaker version of the corresponding ◊S; it was introduced in 1975 by A. Ostaszewski. Contents 1 Definition 2 ♣ and ◊ 3… … Wikipedia
Net (mathematics) — This article is about nets in topological spaces and not about ε nets in other fields. In mathematics, more specifically in general topology and related branches, a net or Moore–Smith sequence is a generalization of the notion of a sequence. In… … Wikipedia
Well-order — In mathematics, a well order relation (or well ordering) on a set S is a total order on S with the property that every non empty subset of S has a least element in this ordering.Equivalently, a well ordering is a well founded total order.The set… … Wikipedia
Bounded set — In mathematical analysis and related areas of mathematics, a set is called bounded, if it is, in a certain sense, of finite size. Conversely a set which is not bounded is called unbounded. Definition A set S of real numbers is called bounded from … Wikipedia
Real closed field — In mathematics, a real closed field is a field F in which any of the following equivalent conditions are true:#There is a total order on F making it an ordered field such that, in this ordering, every positive element of F is a square in F and… … Wikipedia
