spiral symmetry

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• Spiral axis — Axis Ax is, n.; pl. {Axes}. [L. axis axis, axle. See {Axle}.] A straight line, real or imaginary, passing through a body, on which it revolves, or may be supposed to revolve; a line passing through a body or system around which the parts are… …   The Collaborative International Dictionary of English

• Axis of symmetry — Axis Ax is, n.; pl. {Axes}. [L. axis axis, axle. See {Axle}.] A straight line, real or imaginary, passing through a body, on which it revolves, or may be supposed to revolve; a line passing through a body or system around which the parts are… …   The Collaborative International Dictionary of English

• Clifford A. Pickover — Nationality United States of America Fields …   Wikipedia

• Clifford A. Pickover — Clifford Pickover Clifford A. Pickover est un auteur, rédacteur, et chroniqueur dans les domaines de la science, des mathématiques, et de la science fiction. Il est l inventeur des nombres vampires en 1994. Sommaire 1 Publications 1.1 Ouvrages… …   Wikipédia en Français

• Clifford Pickover — Clifford A. Pickover est un auteur, rédacteur, et chroniqueur dans les domaines de la science, des mathématiques, et de la science fiction. Il est l inventeur des nombres vampires en 1994. Sommaire 1 Débuts 2 Style 3 Publications …   Wikipédia en Français

• Clifford A. Pickover — Clifford Alan Pickover (* 15. August 1957) ist ein US amerikanischer Autor populärwissenschaftlicher Bücher über Mathematik und Naturwissenschaften sowie Wissenschaftsjournalist. Inhaltsverzeichnis 1 Biographie 2 Schriften 2.1 Sachbücher …   Deutsch Wikipedia

• Multiferroics — have been formally defined as materials that exhibit more than one primary ferroic order parameter simultaneously (i.e. in a single phase).[1] The four basic primary ferroic order parameters are ferromagnetism, ferroelectricity, ferroelasticity… …   Wikipedia

• galaxy — /gal euhk see/, n., pl. galaxies. 1. Astron. a. a large system of stars held together by mutual gravitation and isolated from similar systems by vast regions of space. b. (usually cap.) See Milky Way. 2. any large and brilliant or impressive… …   Universalium

• Western architecture — Introduction       history of Western architecture from prehistoric Mediterranean cultures to the present.       The history of Western architecture is marked by a series of new solutions to structural problems. During the period from the… …   Universalium

• List of mathematics articles (S) — NOTOC S S duality S matrix S plane S transform S unit S.O.S. Mathematics SA subgroup Saccheri quadrilateral Sacks spiral Sacred geometry Saddle node bifurcation Saddle point Saddle surface Sadleirian Professor of Pure Mathematics Safe prime Safe… …   Wikipedia

• angiosperm — /an jee euh sperrm /, n. Bot. a plant having its seeds enclosed in an ovary; a flowering plant. Cf. gymnosperm. [ANGIO + SPERM] * * * ▪ plant Introduction       any member of the more than 300,000 species of flowering plants (division Anthophyta) …   Universalium