disk geometry

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• Disk (mathematics) — For other uses, see Disc (disambiguation). A disk is the region bounded by a circle. An open disk is the interior of the disk excluding the bounding circle, while a closed disk (see closed set) is the open disk together with the bounding circle.… …   Wikipedia

• Disk covering problem — The disk covering problem was proposed by C. T. Zahn in 1962. Given an integer n, the problem asks for the smallest real number r(n) such that n disks of radius r(n) can be arranged in such a way as to cover the unit disk. The best solutions to… …   Wikipedia

• Disk read-and-write head — A hard disk head and arm on a platter …   Wikipedia

• disk — I (New American Roget s College Thesaurus) n. plate, record, discus; face; floppy or fixed disk; wafer; wheel. See circularity, front, layer. v. plow, harrow. See agriculture, preparation. II (Roget s IV) n. Syn. disc, plate, platter, discoid,… …   English dictionary for students

• Early IBM disk storage — The invention of magnetic disk storage, pioneered by IBM in the 1950s, was a critical component of the computer revolution. This article surveys the major IBM computer disk drives introduced in the 1950s, 1960s and early 1970s. The basic… …   Wikipedia

• non-Euclidean geometry — geometry based upon one or more postulates that differ from those of Euclid, esp. from the postulate that only one line may be drawn through a given point parallel to a given line. [1870 75; NON + EUCLIDEAN] * * * Any theory of the nature of… …   Universalium

• Logical Disk Manager — The Logical Disk Manager (diskmgmt.msc) is an implementation of a logical volume manager for Microsoft Windows NT, developed by Microsoft and Veritas Software. It was introduced with the Windows 2000 operating system, and is supported in Windows… …   Wikipedia

• Differential geometry of surfaces — Carl Friedrich Gauss in 1828 In mathematics, the differential geometry of surfaces deals with smooth surfaces with various additional structures, most often, a Riemannian metric. Surfaces have been extensively studied from various perspectives:… …   Wikipedia

• Poincaré disk model — Poincaré disc model of great rhombitruncated {3,7} tiling …   Wikipedia

• Hyperbolic geometry — Lines through a given point P and asymptotic to line R. A triangle immersed in a saddle shape plane (a hyperbolic paraboloid), as well as two diverging ultraparall …   Wikipedia

• Area of a disk — Part of a series of articles on the mathematical constant π …   Wikipedia