Composition ring — In mathematics, a composition ring, introduced in (Adler 1962), is a commutative ring (R, 0, +, −, ·), possibly without an identity 1 (see non unital ring), together with an operation such that, for any three elements one has … Wikipedia
Composition series — In abstract algebra, a composition series provides a way to break up an algebraic structure, such as a group or a module, into simple pieces. The need for considering composition series in the context of modules arises from the fact that many… … Wikipedia
Ring (mathematics) — This article is about algebraic structures. For geometric rings, see Annulus (mathematics). For the set theory concept, see Ring of sets. Polynomials, represented here by curves, form a ring under addition and multiplication. In mathematics, a… … Wikipedia
Ring-tailed Lemur — Taxobox name = Ring tailed LemurMSW3 Groves|pages=117|id=12100056] status = NT trend = down status system = iucn3.1 status ref = regnum = Animalia phylum = Chordata classis = Mammalia ordo = Primates familia = Lemuridae genus = Lemur genus… … Wikipedia
Ring homomorphism — In ring theory or abstract algebra, a ring homomorphism is a function between two rings which respects the operations of addition and multiplication. More precisely, if R and S are rings, then a ring homomorphism is a function f : R → S such that … Wikipedia
Ring theory — In abstract algebra, ring theory is the study of rings algebraic structures in which addition and multiplication are defined and have similar properties to those familiar from the integers. Ring theory studies the structure of rings, their… … Wikipedia
Ring of Pietroassa — The Ring of Pietroassa (or Buzău torc) is a gold torc like necklace found in a ring barrow in Pietroassa (now Pietroasele), Buzău County, southern Romania (formerly Wallachia), in 1837. It formed part of a large gold hoard (the Pietroasele… … Wikipedia
Composition algebra — In mathematics, a composition algebra A over a field K is a unital (but not necessarily associative) algebra over K together with a nondegenerate quadratic form N which satisfies for all x and y in A. The quadratic form N is often referred… … Wikipedia
Ring of Gullion AONB — The Ring of Gullion is located in County Armagh, Northern Ireland. It measures roughly 26 by 11 miles (42 by 18 km) and comprises some 150 km² defined topographically by the hills of the Ring Dyke. The formation is a type example of a Ring Dyke.… … Wikipedia
Ring Edge — RingEdge RingEdge et RingWide sont deux systèmes d arcade fabriqués par la société Sega, dont la sortie est prévue pour septembre 2009 au Japon. Sommaire 1 Description 2 Spécifications techniques 2.1 RingEdge … Wikipédia en Français
