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torsion ring

См. также в других словарях:

  • Torsion (Algebra) — Torsion ist das Phänomen der kommutativen Algebra, also der Theorie der Moduln über kommutativen Ringen, das sie fundamental von der (einfacheren) Theorie der Vektorräume unterscheidet. Torsion ist verwandt mit dem Begriff des Nullteilers.… …   Deutsch Wikipedia

  • Ring [1] — Ring (hierzu die Tafel »Ringe«), ein Reif, meist von edlem Metall, bisweilen auch von Eisen, Horn, Elfenbein etc., der, gewöhnlich an einem Finger getragen, zum Schmuck dient, oder auch eine symbolische Bedeutung, wie die einer Verbindlichkeit,… …   Meyers Großes Konversations-Lexikon

  • Torsion (algebra) — In abstract algebra, the term torsion refers to a number of concepts related to elements of finite order in groups and to the failure of modules to be free. Definition Let G be a group. An element g of G is called a torsion element if g has… …   Wikipedia

  • Torsion pendulum clock — A torsion pendulum clock, or torsion clock, is a mechanical clock which keeps time with a mechanism called a torsion pendulum. This is a weighted disk or wheel, often a decorative wheel with 3 or 4 chrome balls on ornate spokes, suspended by a… …   Wikipedia

  • Whitehead torsion — In mathematics, Whitehead torsion is an invariant of an h cobordism in a Whitehead group, that is important in simple homotopy theory and surgery theory. It is named for J. H. C. Whitehead.Whitehead torsionSuppose that W is an h cobordism from M… …   Wikipedia

  • Domain (ring theory) — In mathematics, especially in the area of abstract algebra known as ring theory, a domain is a ring such that ab = 0 implies that either a = 0 or b = 0.[1] That is, it is a ring which has no left or right zero divisors. (Sometimes such a ring is… …   Wikipedia

  • Group ring — This page discusses the algebraic group ring of a discrete group; for the case of a topological group see group algebra, and for a general group see Group Hopf algebra. In algebra, a group ring is a free module and at the same time a ring,… …   Wikipedia

  • Annihilator (ring theory) — In mathematics, specifically module theory, annihilators are a concept that formalizes torsionand generalizes torsion and orthogonal complement.DefinitionLet R be a ring, and let M be a left R module. Choose a subset S of M . The annihilator Ann… …   Wikipedia

  • Gas holder — A gasometer, or gas holder, is a large container where natural gas or town gas is stored near atmospheric pressure at ambient temperatures. The volume of the container follows the quantity of stored gas, with pressure coming from the weight of a… …   Wikipedia

  • Load cell — A load cell is an electronic device (transducer) that is used to convert a force into an electrical signal. This conversion is indirect and happens in two stages. Through a mechanical arrangement, the force being sensed deforms a strain gauge.… …   Wikipedia

  • Torsionsfrei — Torsion ist das Phänomen der kommutativen Algebra, also der Theorie der Moduln über kommutativen Ringen, das sie fundamental von der (einfacheren) Theorie der Vektorräume unterscheidet. Torsion ist verwandt mit dem Begriff des Nullteilers.… …   Deutsch Wikipedia

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