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two-dimensional sphere

См. также в других словарях:

  • Sphere — Globose redirects here. See also Globose nucleus. A sphere (from Greek σφαίρα sphaira , globe, ball, [ [http://www.perseus.tufts.edu/cgi bin/ptext?doc=Perseus%3Atext%3A1999.04.0057%3Aentry%3D%23101561 Sphaira, Henry George Liddell, Robert Scott,… …   Wikipedia

  • Sphere packing — In mathematics, sphere packing problems are problems concerning arrangements of non overlapping identical spheres which fill a space. Usually the space involved is three dimensional Euclidean space. However, sphere packing problems can be… …   Wikipedia

  • Dimensional analysis — In physics and all science, dimensional analysis is a tool to find or check relations among physical quantities by using their dimensions. The dimension of a physical quantity is the combination of the basic physical dimensions (usually mass,… …   Wikipedia

  • Sphere Builder — Star Trek race|if= bgcolor=#ffffff Name=Sphere Builders other names= Caption=A Guardian Sphere Builder Affiliation=NoneThe Sphere Builders are aliens from another dimension in the fictional Star Trek universe. They are bent on conquering the… …   Wikipedia

  • Sphere mapping — In computer graphics, sphere mapping is a technique that takes a two dimensional texture coordinate and returns a texel from a texture map that is painted (or photographed) to resemble what a mirrored sphere would look like if placed into a… …   Wikipedia

  • n-sphere — 2 sphere wireframe as an orthogonal projection Just as a …   Wikipedia

  • N-sphere — can project a sphere s surface to a plane, it can also project a 3 sphere s surface into 3 space. This image shows three coordinate directions projected to 3 space:parallels (red), meridians (blue) and hypermeridians (green).Due to the conformal… …   Wikipedia

  • Unit sphere — some unit spheres In mathematics, a unit sphere is the set of points of distance 1 from a fixed central point, where a generalized concept of distance may be used; a closed unit ball is the set of points of distance less than or equal to 1 from a …   Wikipedia

  • Riemann sphere — The Riemann sphere can be visualized as the complex number plane wrapped around a sphere (by some form of stereographic projection – details are given below). In mathematics, the Riemann sphere (or extended complex plane), named after the 19th… …   Wikipedia

  • Kline sphere characterization — The Kline Sphere Characterization is a topological characterization of the two dimensional sphere in terms of what sorts of subsets separate it. Its proof was one of the first notable accomplishments of RH Bing.It is well known that a simple… …   Wikipedia

  • Sphère exotique — En mathématiques, et plus précisément en topologie différentielle, une sphère exotique est une variété différentielle M qui est homéomorphe, mais non difféomorphe, à la n sphère euclidienne standard. Autrement dit, M est une sphère du point de… …   Wikipédia en Français

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