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covering sphere

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  • Covering space — A covering map satisfies the local triviality condition. Intuitively, such maps locally project a stack of pancakes above an open region, U, onto U. In mathematics, more specifically algebraic topology, a covering map is a continuous surjective… …   Wikipedia

  • Sphere (novel) — infobox Book | name = Sphere title orig = translator = image caption = First edition cover author = Michael Crichton illustrator = cover artist = country = United States language = English series = genre = Science Fiction, Techno thriller, Novel… …   Wikipedia

  • Covering code — In coding theory, a covering code is an object satisfying a certain mathematical property: A code of length n over Q is an R covering code if for every word of Qn there is a codeword such that their Hamming distance is . Contents 1 Definition 2… …   Wikipedia

  • Sphere theorem (3-manifolds) — In the topology of 3 manifolds, the sphere theorem denotes a family of statements which show us how the image of a 2 sphere, under a continuous map into a 3 manifold, may behave.One example is the following:Let M be an orientable 3 manifold such… …   Wikipedia

  • Greater East Asia Co-Prosperity Sphere — Poster of Manchukuo promoting harmony between Japanese, Chinese, and Manchu. The caption, written from right to left, says: With the help of Japan, China, and Manchukuo, the world can be in peace. The flags shown are, left to right: the flag of… …   Wikipedia

  • Lebesgue covering dimension — or topological dimension is one of several inequivalent notions of assigning a topological invariant dimension to a given topological space. Contents 1 Definition 2 Examples 3 Properties 4 …   Wikipedia

  • Nerve of a covering — In mathematics, the nerve of an open covering is a construction in topology, of an abstract simplicial complex from an open covering of a topological space X. The notion of nerve was introduced by Pavel Alexandrov.[1] Given an index set I, and… …   Wikipedia

  • Smallest circle problem — The smallest circle problem or minimum covering circle problem is a mathematical problem of computing the smallest circle that contains all of a given set of points in the Euclidean plane. The corresponding problem in n dimensional space, the… …   Wikipedia

  • List of geometry topics — This is list of geometry topics, by Wikipedia page.*Geometric shape covers standard terms for plane shapes *List of mathematical shapes covers all dimensions *List of differential geometry topics *List of geometers *See also list of curves, list… …   Wikipedia

  • scaling — How the characteristics of an object change as you change the size of your measuring device. For a three dimensional object, it could be the volume of an object covered as you increase the radius of a covering sphere. In a times series, it could… …   Financial and business terms

  • Orbifold — This terminology should not be blamed on me. It was obtained by a democratic process in my course of 1976 77. An orbifold is something with many folds; unfortunately, the word “manifold” already has a different definition. I tried “foldamani”,… …   Wikipedia

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