homological elements
61Morita equivalence — In abstract algebra, Morita equivalence is a relationship defined between rings that preserves many ring theoretic properties. It is named after Japanese mathematician Kiiti Morita who defined equivalence and a similar notion of duality in 1958.… …
62History of knot theory — For thousands of years, knots have been used for basic purposes such as recording information, fastening and tying objects together. Over time people realized that different knots were better at different tasks, such as climbing or sailing. Knots …
63Bass–Serre theory — is a part of the mathematical subject of group theory that deals with analyzing the algebraic structure of groups acting by automorphisms on simplicial trees. The theory relates group actions on trees with decomposing groups as iterated… …
64Chronologie de l'Algèbre — Le tableau de cette page fournit une chronologie sommaire des mots clefs dans le développement de l algèbre. Le découpage en grande période tient compte de l avancée des mathématiques dans le monde gréco latin, arabo musulman, et européen. Il ne… …
65Chronologie de l'algèbre — Le tableau de cette page fournit une chronologie sommaire des mots clefs dans le développement de l algèbre. Le découpage en grande période tient compte de l avancée des mathématiques dans le monde gréco latin, arabo musulman, et européen. Il ne… …
66Cyclic polytope — In mathematics, a cyclic polytope, denoted C(n,d), is a convex polytope formed as a convex hull of n distinct points on a rational normal curve in Rd, where n is greater than d. These polytopes were studied by Constantin Carathéodory, David Gale …
67Depth of noncommutative subrings — In ring theory and Frobenius algebra extensions, fields of mathematics, there is a notion of depth two subring or depth of a Frobenius extension. The notion of depth two is important in a certain noncommutative Galois theory, which generates Hopf …
68Nerf d'un recouvrement — Cet article court présente un sujet plus développé dans : ensemble simplicial. En mathématiques, le nerf d un recouvrement est un ensemble simplicial associé à un recouvrement ouvert d un espace topologique E. Il peut éventuellement… …
69Cone — This disambiguation page lists articles associated with the same title. If an internal link led you here, you may wish to change the link to point directly to the intended article …
70Tensor — For other uses, see Tensor (disambiguation). Note that in common usage, the term tensor is also used to refer to a tensor field. Stress, a second order tensor. The tensor s components, in a three dimensional Cartesian coordinate system, form the… …
