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1 ангармоническое отношение четырёх точек
Mathematics: anharmonic ratio of four pointsУниверсальный русско-английский словарь > ангармоническое отношение четырёх точек
См. также в других словарях:
anharmonic ratio — Anharmonic An har*mon ic, a. [F. anharmonique, fr. Gr. an priv. + ? harmonic.] (Math.) Not harmonic. [1913 Webster] The {anharmonic function} or {anharmonic ratio} of four points abcd on a straight line is the quantity (ac/ad):(bc/bd), where the… … The Collaborative International Dictionary of English
anharmonic ratio — Math. See cross ratio. [1860 65] * * * anharmonic ratio noun The cross ratio of four numbers, four points on a straight line or four lines in a pencil (harmonic when = 1) • • • Main Entry: ↑anharmonic … Useful english dictionary
Anharmonic — An har*mon ic, a. [F. anharmonique, fr. Gr. an priv. + ? harmonic.] (Math.) Not harmonic. [1913 Webster] The {anharmonic function} or {anharmonic ratio} of four points abcd on a straight line is the quantity (ac/ad):(bc/bd), where the segments… … The Collaborative International Dictionary of English
anharmonic function — Anharmonic An har*mon ic, a. [F. anharmonique, fr. Gr. an priv. + ? harmonic.] (Math.) Not harmonic. [1913 Webster] The {anharmonic function} or {anharmonic ratio} of four points abcd on a straight line is the quantity (ac/ad):(bc/bd), where the… … The Collaborative International Dictionary of English
cross ratio — noun Etymology: cross (III) : an anharmonic ratio in mathematics * * * cross ratio, adj. Geom. a ratio relating four points in the real or complex plane. Also called anharmonic ratio. [1880 85] … Useful english dictionary
cross ratio — cross ratio, adj. Geom. a ratio relating four points in the real or complex plane. Also called anharmonic ratio. [1880 85] * * * ▪ mathematics in projective geometry, ratio that is of fundamental importance in characterizing projections. In a… … Universalium
Cross-ratio — D is the harmonic conjugate of C with respect to A and B In geometry, the cross ratio, also called double ratio and anharmonic ratio, is a special number associated with an ordered quadruple of collinear points, particularly points on a… … Wikipedia
Lazare Carnot — President of the National Convention In office May 20, 1794 – June 4, 1794 Preceded by Robert Lindet S … Wikipedia
Quartz crystal microbalance — A quartz crystal microbalance (QCM) measures a mass per unit area by measuring the change in frequency of a quartz crystal resonator. The resonance is disturbed by the addition or removal of a small mass due to oxide growth/decay or film… … Wikipedia
spectroscopy — spectroscopist /spek tros keuh pist/, n. /spek tros keuh pee, spek treuh skoh pee/, n. the science that deals with the use of the spectroscope and with spectrum analysis. [1865 70; SPECTRO + SCOPY] * * * Branch of analysis devoted to identifying… … Universalium