- quadrature problem
- мат. задача о квадратуре
Большой англо-русский и русско-английский словарь. 2001.
quadrature problem
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Quadrature — Quadrature, derived from Latin quadrare , may refer to:In signal processing: *Quadrature amplitude modulation (QAM), a modulation method of using both a carrier wave and a quadrature carrier wave that is 90° out of phase with the main carrier… … Wikipedia
quadrature of the circle — a problem in mathematics that consists of finding the side of a square exactly equal in area to a given circular area and that has been shown to be impossible of solution by geometric methods limited to the use of ruler and compass alone * * *… … Useful english dictionary
Quadrature Phase Shift Keying — Die Quadraturphasenumtastung oder Vierphasen Modulation (englisch Quadrature Phase Shift Keying, QPSK) ist ein digitales Modulationsverfahren in der Nachrichtentechnik. Mit QPSK können pro Sendesymbol zwei Bits übertragen werden. Dadurch… … Deutsch Wikipedia
quadrature of the circle — Math. the insoluble problem of constructing, by the methods of Euclidean geometry, a square equal in area to a given circle. Also called squaring the circle. [1590 1600] * * * … Universalium
quadrature of the circle — noun The problem, proposed by ancient Greek geometers, of using a finite ruler and compass construction to make a square with the same area as a given circle. Syn: squaring the circle … Wiktionary
quadrature of the circle — noun the mathematical problem of constructing, subject to certain conditions, a square equal in area to a given circle …
Gaussian quadrature — In numerical analysis, a quadrature rule is an approximation of the definite integral of a function, usually stated as a weighted sum of function values at specified points within the domain of integration.(See numerical integration for more on… … Wikipedia
Clenshaw–Curtis quadrature — and Fejér quadrature are methods for numerical integration, or quadrature , that are based on an expansion of the integrand in terms of Chebyshev polynomials. Equivalently, they employ a change of variables x = cos θ and use a discrete… … Wikipedia
Gauss–Kronrod quadrature formula — In numerical mathematics, the Gauss–Kronrod quadrature formula is a method for numerical integration (calculating approximate values of integrals). Gauss–Kronrod quadrature is a variant of Gaussian quadrature, in which the evaluation points are… … Wikipedia
Inverse problem — An inverse problem is a general framework that is used to convert observed measurements into information about a physical object or system that we are interested in. For example, if we have measurements of the Earth s gravity field, then we might … Wikipedia
List of numerical analysis topics — This is a list of numerical analysis topics, by Wikipedia page. Contents 1 General 2 Error 3 Elementary and special functions 4 Numerical linear algebra … Wikipedia
