- pole and polar of a conic
- Математика: полюс и поляра конического сечения
Универсальный англо-русский словарь. Академик.ру. 2011.
pole and polar of a conic
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Pole and polar — In geometry, the terms pole and polar are used to describe a point and a line that have a unique reciprocal relationship with respect to a given conic section. If the point lies on the conic section, its polar is the tangent line to the conic… … Wikipedia
Polar — Po lar, n. (Conic Sections) The right line drawn through the two points of contact of the two tangents drawn from a given point to a given conic section. The given point is called the pole of the line. If the given point lies within the curve so… … The Collaborative International Dictionary of English
Polar coordinate system — Points in the polar coordinate system with pole O and polar axis L. In green, the point with radial coordinate 3 and angular coordinate 60 … Wikipedia
polar — I. adjective Etymology: New Latin polaris, from Latin polus pole Date: 1551 1. a. of or relating to a geographic pole or the region around it b. coming from or having the characteristics of such a region c. (1) passing over a celestial body s… … New Collegiate Dictionary
pole — I. noun Etymology: Middle English, from Old English pāl stake, pole, from Latin palus stake; akin to Latin pangere to fix more at pact Date: before 12th century 1. a. a long slender usually cylindrical object (as a length of wood) b. a shaft… … New Collegiate Dictionary
Matrix representation of conic sections — In mathematics, the matrix representation of conic sections is one way of studying a conic section, its axis, vertices, foci, tangents, and the relative position of a given point. We can also study conic sections whose axes aren t parallel to our … Wikipedia
Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity. Computer scientist Manindra Agrawal of the… … Universalium
Hyperbola — This article is about a geometrical curve, a conic section. For the term used in rhetoric, see Hyperbole … Wikipedia
Duality (projective geometry) — A striking feature of projective planes is the symmetry of the roles played by points and lines in the definitions and theorems, and (plane) duality is the formalization of this metamathematical concept. There are two approaches to the subject of … Wikipedia
Poncelet, Jean-Victor — ▪ French mathematician born July 1, 1788, Metz, France died December 22, 1867, Paris French mathematician and engineer who was one of the founders of modern projective geometry. As a lieutenant of engineers in 1812, he took part in… … Universalium
Sundial — A sundial is a device that measures time by the position of the Sun. In common designs such as the horizontal sundial, the sun casts a shadow from its style (a thin rod or a sharp, straight edge) onto a flat surface marked with lines indicating… … Wikipedia
