meager set
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Meager — or Meagre (see American and British English spelling differences) can refer to: Meagre set (also meager set) in mathematics Mount Meager (also Mount Meagre, Mount Meagher) in British Columbia, Canada Meager Creek, a creek in British Columbia,… … Wikipedia
Meager Creek — flowing next to a hot spring pool. Mouth Lillooet River Basin countries Canada … Wikipedia
Ideal (set theory) — In the mathematical field of set theory, an ideal is a collection of sets that are considered to be small or negligible . Every subset of an element of the ideal must also be in the ideal (this codifies the idea that an ideal is a notion of… … Wikipedia
Luzin set — In real analysis and descriptive set theory, a Luzin set (or Lusin set), named for N. N. Luzin, is an uncountable subset A of the reals such that every uncountable subset of A is nonmeager; that is, of second Baire category. Equivalently, A is an … Wikipedia
Meagre set — In the mathematical fields of general topology and descriptive set theory, a meagre set (also called a meager set or a set of first category) is a set that, considered as a subset of a (usually larger) topological space, is in a precise sense… … Wikipedia
Cichoń's diagram — In set theory, Cichoń s diagram or Cichon s diagram is a table of 10 infinite cardinal numbers related to the set theory of the reals displaying the provable relations between these cardinal invariants. All these cardinals are greater than or… … Wikipedia
Thomae's function — If you are having difficulty understanding this article, you might wish to learn more about algebra, functions, and mathematical limits. Thomae s function, also known as the popcorn function, the raindrop function, the ruler function or the… … Wikipedia
List of properties of sets of reals — This page lists some properties of sets of real numbers. The general study of these concepts forms descriptive set theory, which has a rather different emphasis from general topology.Definability properties* Borel set * Analytic set * C… … Wikipedia
Property of Baire — A subset A of a topological space X has the property of Baire (Baire property) if it differs from an open set by a meager set; that is, if there is an open: Usubseteq Xsuch that: ADelta Uis meager (here, Delta; denotes the symmetric… … Wikipedia
Woodin cardinal — In set theory, a Woodin cardinal (named for W. Hugh Woodin) is a cardinal number λ such that for all : f : λ rarr; λthere exists:κ < λ with { f (β)|β … Wikipedia
Derivative — This article is an overview of the term as used in calculus. For a less technical overview of the subject, see Differential calculus. For other uses, see Derivative (disambiguation) … Wikipedia
