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sigma ring

См. также в других словарях:

  • 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-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

  • Ring of sets — In mathematics, a nonempty collection of sets mathcal{R} is called a ring (of sets) if it is closed under intersection and symmetric difference. That is, for any A,Binmathcal{R}, #A cap B in mathcal{R} #A riangle B in mathcal{R}where riangle… …   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-Algebra — Eine σ Algebra (auch σ Mengenalgebra, Sigmakörper oder Borelscher Mengenkörper) ist ein Grundbegriff der Maßtheorie. Als solcher wird sie auch in der Stochastik häufig verwendet. Eine σ Algebra ist eine mengentheoretische Struktur, sie bezeichnet …   Deutsch Wikipedia

  • Sigma Corporation — Nihongo|Sigma Corporation|株式会社シグマ|Kabushiki gaisha Shiguma is a Japanese company founded in 1961, manufacturing cameras, lenses, flashes and other photographic accessories. All Sigma products are produced in the company s own Aizu factory in… …   Wikipedia

  • Sigma 70-300mm f/4-5.6 APO DG Macro lens — Infobox photographic lenses name = Sigma 70 300 mm APO DG Macro maker = Sigma feat is = n feat usm = n feat sbf = n feat macro = y feat special = type = z application = Consumer Telephoto Zoom flength = 70 300mm fov = aperture = f/4 f/5.6 groups …   Wikipedia

  • Delta-ring — In mathematics, a nonempty collection of sets is called a δ ring (pronounced delta ring) if it is closed under union, relative complementation, and countable intersection: if if …   Wikipedia

  • Glossary of ring theory — Ring theory is the branch of mathematics in which rings are studied: that is, structures supporting both an addition and a multiplication operation. This is a glossary of some terms of the subject. Contents 1 Definition of a ring 2 Types of… …   Wikipedia

  • Delta Sigma Epsilon — ΔΣE Founded September 23, 1914 (1914 09 23) (97 years ago) Miami University, (Oxford, Ohio) Type Social Scope …   Wikipedia

  • Outer Ring Road, Bangalore — Coordinates: 12°55′29″N 77°40′54″E / 12.924763°N 77.68158°E / 12.924763; 77.68158 …   Wikipedia

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