sigma field

См. также в других словарях:

• 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-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

• Sigma-Aldrich — Corporation nasdaq|SIAL, headquartered in St. Louis, Missouri, is a supplier of reagents and materials for use in research and development, diagnostics and analysis. They have facilities in 36.5 countries and manufacture many of the chemicals… …   Wikipedia

• Sigma Gamma Tau — is the honor society for Aerospace Engineering. It seeks to identify and recognize achievement and excellence in the Aerospace field. Sigma Gamma Tau s collegiate chapters elect annually to membership those students, alumni, and professionals who …   Wikipedia

• Sigma Alpha Rho — ΣAP Founded November 18, 1917 West Philadelphia, Pennsylvania Type Religious …   Wikipedia

• Sigma (disambiguation) — Sigma may refer to: * Sigma (Σ, σ, or ς), of the Greek alphabetCompanies: * Sigma TV a television channel in Cyprus * Sigma Company, an Australian company. Its main operations include Pharmaceuticals and Pharmacies * Sigma Corporation, a Japanese …   Wikipedia

• Sigma Ceti — Constelación Cetus Ascensión recta α 02h 32min 05,23s Declinación δ 15º 14’ 40,8’’ Distancia …   Wikipedia Español

• Sigma Iota Epsilon — is a National Honorary and Professional Management Fraternity. The stated goals of Sigma Iota Epsilon are;*To stimulate interest and achievement in the field of management; *To stimulate scholarship in management; *To facilitate contacts between… …   Wikipedia

• Sigma Lambda Alpha honor society — Sigma Lambda Alpha (ΣΛΑ) is a scholastic honor society recognizing academic achievement among students in the field of Landscape Architecture. The society was founded at University of Minnesota in 1977, and admitted to the Association of College… …   Wikipedia

• Field of sets — Set algebra redirects here. For the basic properties and laws of sets, see Algebra of sets. In mathematics a field of sets is a pair where X is a set and is an algebra over X i.e., a non empty subset of the power set of X closed under the… …   Wikipedia

• Field of values — In matrix theory, the field of values associated with a matrix is the image of the unit sphere under the quadratic form induced by the matrix. More precisely, suppose A is a square matrix with complex entries. The field of values for A is the set …   Wikipedia