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11Sphere 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… …
12sphere — sphereless, adj. spherelike, adj. /sfear/, n., v., sphered, sphering. n. 1. Geom. a. a solid geometric figure generated by the revolution of a semicircle about its diameter; a round body whose surface is at all points equidistant from the center …
13Sphère de Dyson — Pour les articles homonymes, voir Sphère (homonymie) et Dyson (homonymie). Schéma d’une coquille de Dyson d’une unité astronomique de rayon. Une sphère …
14Sphere-world — The idea of a sphere world was constructed by Henri Poincaré while pursuing his argument for conventionalism (see philosophy of space and time), offered a thought experiment about a sphere with strange properties.Poincaré asks us to imagine a… …
15Sphère 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… …
16Sphere 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… …
17Sphere theorem — This article is about sphere theorem for Riemannian manifolds. For a different result by the same name, see Sphere theorem (3 manifolds). In Riemannian geometry, the sphere theorem, also known as the quarter pinched sphere theorem, strongly… …
18sphere — 01. Everyone working in the [sphere] of education will be affected by the government s budget cuts. 02. After World War Two, Czechoslovakia fell within the Soviet [sphere] of influence. 03. Free moving liquid in outer space will form itself into… …
19sphere — /sfɪə / (say sfear) noun 1. a. a geometrical figure generated by the revolution of a semi circle about its diameter. b. a round body whose surface is at all points equidistant from the centre. 2. any rounded body approximately of this form; a… …
20sphere — noun /sfɪə,sfɪr/ a) A regular three dimensional object in which every cross section is a circle; the figure described by the revolution of a circle about its diameter . Though cold and darkness longer hang somewhere, / Yet Phoebus equally lights… …
