stacked covering
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Covering space — A covering map satisfies the local triviality condition. Intuitively, such maps locally project a stack of pancakes above an open region, U, onto U. In mathematics, more specifically algebraic topology, a covering map is a continuous surjective… … Wikipedia
Goaltender — This article is about the position in ice hockey. For the similar position in field lacrosse, see Goaltender (field lacrosse). For similar positions in other sports, see goalkeeper. For the basketball foul, see goaltending. Goalie Roberto Luongo… … Wikipedia
Roman infantry tactics — refers to the theoretical and historical deployment, formation and maneuvers of the Roman infantry from the start of the Roman Republic to the fall of the Western Roman Empire. The article first presents a short overview of Roman training. Roman… … Wikipedia
pottery — /pot euh ree/, n., pl. potteries. 1. ceramic ware, esp. earthenware and stoneware. 2. the art or business of a potter; ceramics. 3. a place where earthen pots or vessels are made. [1475 85; POTTER1 + Y3] * * * I One of the oldest and most… … Universalium
Kamen Rider Den-O (character) — Kamen Rider Den O s first five forms in an eyecatch (from left to right): Rod, Ax, Sword, Gun, and Wing. Kamen Rider Den O (仮面ライダー電王, Kamen Raidā Den ō … Wikipedia
Hay — is a generic term for grass or legumes that have been cut, dried, and stored for use as animal feed, particularly for grazing animals like cattle, horses, goats, and sheep. Hay can also be fed to pets such as guinea pigs and rabbits, though they… … Wikipedia
Headlamp — Headlight redirects here. For other uses, see Headlight (disambiguation). High Beams redirects here. For the urban legend also known by that name, see Killer in the backseat. A motor scooter s front with an impractical number and variety of… … Wikipedia
P-90 — For other uses, see P90 (disambiguation). P 90 Manufacturer Gibson Period 1946–1957, reissues since 1968 … Wikipedia
animal development — Introduction the processes that lead eventually to the formation of a new animal starting from cells derived from one or more parent individuals. Development thus occurs following the process by which a new generation of organisms is produced by … Universalium
Door — For other uses, see Door (disambiguation). A door is a movable structure used to open and close off an entrance, typically consisting of a panel that swings on hinges or that slides or rotates inside of a space. When open, they admit ventilation… … Wikipedia
materials science — the study of the characteristics and uses of various materials, as glass, plastics, and metals. [1960 65] * * * Study of the properties of solid materials and how those properties are determined by the material s composition and structure, both… … Universalium
