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- этимология
Что (кто) такое stationary subset - определение
SET-THEORETIC CONCEPT
Stationary subset; Thinness of a set; Thin set (set theory)
Stationary set
In mathematics, specifically set theory and model theory, a stationary set is a set that is not too small in the sense that it intersects all club sets, and is analogous to a set of non-zero measure in measure theory. There are at least three closely related notions of stationary set, depending on whether one is looking at subsets of an ordinal, or subsets of something of given cardinality, or a powerset.
Cofinal (mathematics)
IN ORDER THEORY, A SUBSET 𝑌 OF A POSET 𝑋 SUCH THAT FOR ANY ELEMENT OF 𝑋, THERE EXISTS AN ELEMENT OF 𝑌 LARGER THAN IT
Cofinal subset; Cofinal function; Cofinal sequence; Cofinal net; Coinitial; Cofinal set; Final function
In mathematics, a subset B \subseteq A of a preordered set (A, \leq) is said to be cofinal or frequent in A if for every a \in A, it is possible to find an element b in B that is "larger than a" (explicitly, "larger than a" means a \leq b).
stationary bicycle
DEVICE WITH SADDLE, PEDALS, AND SOME FORM OF HANDLEBARS ARRANGED AS ON A BICYCLE, BUT USED AS EXERCISE EQUIPMENT RATHER THAN TRANSPORTATION.
Exercise bike; Stationary bike; Stationary bicycling; Cycloergometer; Ergometric bicycle; Exercise bicycle; Bicycle ergometer; Cycle ergometer; Exercycle; Exercising bike; Cycling exercise machine; Exercycle stationary bike; Stationary cycle
¦ noun an exercise bike.
Википедия
Stationary set
In mathematics, specifically set theory and model theory, a stationary set is a set that is not too small in the sense that it intersects all club sets, and is analogous to a set of non-zero measure in measure theory. There are at least three closely related notions of stationary set, depending on whether one is looking at subsets of an ordinal, or subsets of something of given cardinality, or a powerset.
