- positive curvature
- мат. положительная кривизна
Большой англо-русский и русско-английский словарь. 2001.
positive curvature
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Non-positive curvature — In mathematics, spaces of non positive curvature occur in many contexts and form a generalization of hyperbolic geometry. In the category of Riemannian manifolds, one can consider the sectional curvature of the manifold and require that this… … Wikipedia
Curvature — In mathematics, curvature refers to any of a number of loosely related concepts in different areas of geometry. Intuitively, curvature is the amount by which a geometric object deviates from being flat, or straight in the case of a line, but this … Wikipedia
Curvature invariant (general relativity) — Curvature invariants in general relativity are a set of scalars called curvature invariants that arise in general relativity. They are formed from the Riemann, Weyl and Ricci tensors which represent curvature and possibly operations on them such… … Wikipedia
Positive train control — (PTC) is a system of monitoring and controlling train movements to provide increased safety.OverviewThe main concept in PTC is that the train receives information about its location and where it is allowed to safely travel. Equipment on board the … Wikipedia
Positive vorticity advection — Positive vorticity advection, or PVA, is the result of higher values of vorticity advecting into lower values of vorticity. DevelopmentVorticity in the atmosphere is created in three different ways, which are named in their resultant vorticity.… … Wikipedia
Curvature of Riemannian manifolds — In mathematics, specifically differential geometry, the infinitesimal geometry of Riemannian manifolds with dimension at least 3 is too complicated to be described by a single number at a given point. Riemann introduced an abstract and rigorous… … Wikipedia
Positive form — In complex geometry, the term positive form refers to several classes of real differential formsof Hodge type (p, p) . (1,1) forms Real ( p , p ) forms on a complex manifold M are forms which are of type ( p , p ) and real,that is, lie in the… … Wikipedia
positive hydrotropism — Hydrotropism Hy*drot ro*pism, n. 1. (Bot.) A tendency towards moisture. [1913 Webster] 2. (Bot.) In a broader sense, any curvature or turning induced in certain growing plant organs under the influence of moisture. Note: When the movement is… … The Collaborative International Dictionary of English
Positive Butterfly — A non parallel yield curve shift in which short and long term rates shift upward by a greater magnitude than medium term rates. This yield curve shift effectively humps the curve, adding to its curvature. A non parallel shift in the yield curve… … Investment dictionary
curvature of space — Physics, Astron. 1. (in relativity) a property of space near massive bodies in which their gravitational field causes light to travel along curved paths. 2. (in cosmology) a large scale property of the universe that has an algebraic sign that… … Universalium
curvature of space — Physics, Astron. 1. (in relativity) a property of space near massive bodies in which their gravitational field causes light to travel along curved paths. 2. (in cosmology) a large scale property of the universe that has an algebraic sign that… … Useful english dictionary
