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focal set

См. также в других словарях:

  • Affine focal set — In mathematics, and especially affine differential geometry, the affine focal set of a smooth submanifold M embedded in a smooth manifold N is the caustic generated by the affine normal lines. It can be realised as the bifurcation set of a… …   Wikipedia

  • FOCAL-69 — was the landmark version of the FOCAL programming language, more widely publicized than the original version of the language created in 1968. FOCAL 69, created by Richard Merrill is important because: * It was the basis for all later derivatives… …   Wikipedia

  • FOCAL (programming language) — FOCAL, (abbreviation of FOrmula CALculator), is an interpreted programming language resembling JOSS.Largely the creation of Richard Merrill, FOCAL was initially written for and had its largest impact on the Digital Equipment Corporation s (DEC s) …   Wikipedia

  • Focal palmoplantar keratoderma with oral mucosal hyperkeratosis — Classification and external resources OMIM 114140 Focal palmoplantar keratoderma with oral mucosal hyperkeratosis (also known as Focal epidermolytic palmoplantar keratoderma, [1] Hereditary painful cal …   Wikipedia

  • Focal vocabulary — is a specialized set of terms and distinctions that is particularly important to a certain group; those with particular focuses of experience or activity. A lexicon, or vocabulary, is a language’s dictionary, its set of names for things, events,… …   Wikipedia

  • Focal length — The focal length of an optical system is a measure of how strongly it converges (focuses) or diverges (diffuses) light. A system with a shorter focal length has greater optical power than one with a long focal length. Thin lens approximation For… …   Wikipedia

  • Focal subgroup theorem — In abstract algebra, the focal subgroup theorem describes the fusion of elements in a Sylow subgroup of a finite group. The focal subgroup theorem was introduced in (Higman 1958) and is the first major application of the transfer according to… …   Wikipedia

  • Focal-plane shutter — In camera design, a focal plane shutter is a type of photographic shutter that is positioned immediately in front of the focal plane of the camera, that is, right in front of the photographic film or image sensor. AdvantagesOne of the main… …   Wikipedia

  • Focal mechanism — The focal mechanism of an earthquake describes the inelastic deformation in the source region that generates the seismic waves. In the case of a fault related event it refers to the orientation of the fault plane that slipped and the slip vector… …   Wikipedia

  • focal plane —    In photography, an image line at right angle to the optical axis passing through the focal point. This forms the plane of sharp focus when a camera is set on infinity. Also see aperture, camera, focal length, and f/stop …   Glossary of Art Terms

  • focal area — Ling. (in dialect geography) an area whose dialect has exerted influence on the dialects of surrounding areas, as reflected in a set of isoglosses more or less concentrically surrounding it. Cf. relic area, transition area. * * * …   Universalium

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