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111RÉELS (NOMBRES) — Par les différents adjectifs généralement accolés au substantif commun qu’est le nombre, la langue mathématique familière surprend et inquiète, car elle risque de susciter des confusions: nombres rationnels (d’autres nombres seraient donc sans… …
112SYSTÈMES DYNAMIQUES DIFFÉRENTIABLES — Sans doute née avec le mémoire que Poincaré écrivit en 1881 «sur les courbes définies par des équations différentielles», où l’étude quantitative (analytique) locale des équations différentielles dans le champ complexe est remplacée par leur… …
113Geometric algebra — In mathematical physics, a geometric algebra is a multilinear algebra described technically as a Clifford algebra over a real vector space equipped with a non degenerate quadratic form. Informally, a geometric algebra is a Clifford algebra that… …
114Screw — This article is about the fastener. For other uses, see Screw (disambiguation). Screws come in a variety of shapes and sizes for different purposes. U.S. quarter coin (diameter 24 mm) shown for scale. A screw, or bolt, is a type of fastener… …
115Drill bit — For the fictional character, see Drill Bit (Transformers). For the cancelled skyscraper nicknamed Drill bit, see Chicago Spire. For the types used in drilling wells, see Well drilling. From top to bottom: Spade, lip and spur (brad point), masonry …
116Ordnance QF 18 pounder — Australian gun crew in action in the Ypres sector, 28 September 1917 Type Field gun Place& …
117Scale (map) — The scale of a map is defined as the ratio of a distance on the map to the corresponding distance on the ground. If the region of the map is small enough for the curvature of the Earth to be neglected, then the scale may be taken as a constant… …
118Cortina Cycles — is a bicycle frame manufacturer in Santa Barbara, California. It has made frames for Italian companies such as Bennotto, and Gios. Cortina Cycles. Type Private Industry Bicycles Founded 1955 Headquarters 2024 Mountain Ave, Santa Barbara,… …
119artillery — /ahr til euh ree/, n. 1. mounted projectile firing guns or missile launchers, mobile or stationary, light or heavy, as distinguished from small arms. 2. the troops or the branch of an army concerned with the use and service of such weapons. 3.… …
120Conversion of units — is the conversion between different units of measurement for the same quantity, typically through multiplicative conversion factors. Contents 1 Techniques 1.1 Process 1.2 Multiplication factors …
