sigma-measure
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Measure (mathematics) — Informally, a measure has the property of being monotone in the sense that if A is a subset of B, the measure of A is less than or equal to the measure of B. Furthermore, the measure of the empty set is required to be 0. In mathematical analysis … Wikipedia
Sigma-algebra — In mathematics, a σ algebra (also sigma algebra, σ field, sigma field) is a technical concept for a collection of sets satisfying certain properties. The main use of σ algebras is in the definition of measures; specifically, the collection of… … Wikipedia
Sigma additivity — In mathematics, additivity and sigma additivity of a function defined on subsets of a given set are abstractions of the intuitive properties of size (length, area, volume) of a set. Contents 1 Additive (or finitely additive) set functions 2 σ… … Wikipedia
Sigma-ideal — In mathematics, particularly measure theory, a σ ideal of a sigma algebra ( σ , read sigma, means countable in this context) is a subset with certain desirable closure properties. It is a special type of ideal. Its most frequent application is… … Wikipedia
Sigma SD14 — Infobox Digicam model = Sigma SD14 Digital single lens reflex sensor = 20.7 mm x 13.8 mm Foveon X3 sensor res = 2652 × 1768 × 3 (14.1 million active photoelements) lens = Interchangeable (Sigma SA mount) viewfinder = Optical, pentaprism storage … Wikipedia
Sigma-anneau — Un σ anneau (lire sigma anneau) est un système d ensembles dont la définition est un peu plus générale que celle des σ algèbres (ou « tribus »). Il est possible de présenter dans ce formalisme alternatif la théorie de la mesure, aujourd … Wikipédia en Français
measure — measurer, n. /mezh euhr/, n., v., measured, measuring. n. 1. a unit or standard of measurement: weights and measures. 2. a system of measurement: liquid measure. 3. an instrument, as a graduated rod or a container of standard capacity, for… … Universalium
Sigma-ring — In mathematics, a nonempty collection of sets mathcal{R} is called a σ ring (pronounced sigma ring ) if it is closed under countable union and relative complementation: #igcup {n=1}^{infty} A {n} in mathcal{R} if A {n} in mathcal{R} for all n in … Wikipedia
Gaussian measure — In mathematics, Gaussian measure is a Borel measure on finite dimensional Euclidean space R n , closely related to the normal distribution in statistics. There is also a generalization to infinite dimensional spaces. Gaussian measures are named… … Wikipedia
Strictly positive measure — In mathematics, strict positivity is a concept in measure theory. Intuitively, a strictly positive measure one that is nowhere zero , or that it is zero only on points .DefinitionLet ( X , T ) be a Hausdorff topological space and let Sigma; be a… … Wikipedia
Six Sigma — Not to be confused with Sigma 6. The often used Six Sigma symbol Part of a series of articles on I … Wikipedia
