Useful english dictionary. 2012.
Sheaf Arrow — ♦ Heavy armour piercing arrow used by longbowmen at close range. (Wise, Terence. Medieval Warfare, 251) … Medieval glossary
Sheaf (mathematics) — This article is about sheaves on topological spaces. For sheaves on a site see Grothendieck topology and Topos. In mathematics, a sheaf is a tool for systematically tracking locally defined data attached to the open sets of a topological space.… … Wikipedia
Sheaf extension — In Sheaf theory (a branch of the mathematics area of algebraic geometry), a sheaf extension is a way of describing a sheaf in terms of a subsheaf and a quotient sheaf, analogous to a how a group extension describes a group in terms of a subgroup … Wikipedia
List of Empire ships (Sa–Sh) — The Empire ships were a series of ships in the service of the British Government. Their names were all prefixed with Empire . Mostly they were used during World War II by the Ministry of War Transport (MoWT), who owned the ships but contracted… … Wikipedia
Archdecker — Der Archdecker war ein Schiffstyp für die Massengutfahrt, der Anfang des 20. Jahrhunderts in Großbritannien entstand. Der Name leitet sich von der Bauart des Schiffsrumpfes mit einer über die gesamte Laderaumlänge reichenden, seitlichen… … Deutsch Wikipedia
Blyth Dry Docks & Shipbuilding Company — Lageplan von Blyth Dry Docks Shipbuilding Die Blyth Dry Docks Shipbuilding Company war ein Schiffbauunternehmen in Blyth (Northumberland). Die Werft bestand von 1811 bis 1967 und baute außer einigen innovativen Schiffstypen auch das erste… … Deutsch Wikipedia
Grothendieck topology — In category theory, a branch of mathematics, a Grothendieck topology is a structure on a category C which makes the objects of C act like the open sets of a topological space. A category together with a choice of Grothendieck topology is called a … Wikipedia
mathematics, foundations of — Scientific inquiry into the nature of mathematical theories and the scope of mathematical methods. It began with Euclid s Elements as an inquiry into the logical and philosophical basis of mathematics in essence, whether the axioms of any system… … Universalium
Cousin problems — In mathematics, the Cousin problems are two questions in several complex variables, concerning the existence of meromorphic functions that are specified in terms of local data. They were introduced in special cases by P. Cousin in 1895. They are… … Wikipedia
History of archery — Projectile points are known from early in prehistory. The earlier examples were probably used on spears or on atlatl darts. Examination of the points alone does not allow the method of launching to be determined, and, as bows are normally made of … Wikipedia
