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four-dimensional sphere

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  • 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 — 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

  • Dimensional regularization — Renormalization and regularization Renormalization Renormalization …   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

  • Four color theorem — Example of a four colored map A four colori …   Wikipedia

  • sphere —    A three dimensional form shaped like a ball, circular from all possible points of view. Its surface consists of points, all of which are the same distance (radius) from its center. Refers both to the surface and to the space it encloses. The… …   Glossary of Art Terms

  • 3-sphere — Stereographic projection of the hypersphere s parallels (red), meridians (blue) and hypermeridians (green). Because this projection is conformal, the curves intersect each other orthogonally (in the yellow points) as in 4D. All curves are circles …   Wikipedia

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

  • Lie sphere geometry — is a geometrical theory of planar or spatial geometry in which the fundamental concept is the circle or sphere. It was introduced by Sophus Lie in the nineteenth century. [The definitive modern textbook on Lie sphere geometry is Harvnb|Cecil|1992 …   Wikipedia

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