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inverse spectrum

См. также в других словарях:

  • Inverse photoemission spectroscopy — (IPES) is a surface science technique used to study the unoccupied electronic structure of surfaces, thin films and adsorbates. A well collimated beam of electrons of a well defined energy (< 20 eV) is directed at the sample. These electrons… …   Wikipedia

  • Spectrum (functional analysis) — In functional analysis, the concept of the spectrum of a bounded operator is a generalisation of the concept of eigenvalues for matrices. Specifically, a complex number λ is said to be in the spectrum of a bounded linear operator T if… …   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

  • Spectrum analyzer — A spectrum analyzer Spectrum analyzer display A spectrum analyzer measures the magnitude of an input signal versus frequency with …   Wikipedia

  • Spectrum (homotopy theory) — In algebraic topology, a branch of mathematics, a spectrum is an object representing a generalized cohomology theory. There are several different constructions of categories of spectra, all of which give the same homotopy category.Suppose we… …   Wikipedia

  • Spectrum of a C*-algebra — The spectrum of a C* algebra or dual of a C* algebra A, denoted Â, is the set of unitary equivalence classes of irreducible * representations of A. A * representation π of A on a Hilbert space H is irreducible if, and only if, there is no closed… …   Wikipedia

  • inverse Fourier transform — noun A mathematical operation that transforms a function for a discrete or continuous spectrum into a function for the amplitude with the given spectrum; an inverse transform of the Fourier transform …   Wiktionary

  • Decomposition of spectrum (functional analysis) — In mathematics, especially functional analysis, the spectrum of an operator generalizes the notion of eigenvalues. Given an operator, it is sometimes useful to break up the spectrum into various parts. This article discusses a few examples of… …   Wikipedia

  • ZX Spectrum character set — The ZX Spectrum character set is the variant of ASCII used in the British Sinclair Spectrum computers. It is based on ASCII 1967 (the standard ASCII on which all modern character sets are based), but with one character from ASCII 1963 (the first… …   Wikipedia

  • Набор символов ZX Spectrum — Набор символов ZX Spectrum  это вариант ASCII, используемый в 8 разрядном компьютере ZX Spectrum, его вариациях и клонах. 0x 1x 2x 3x 4x 5x 6x 7x 8x 9x Ax Bx Cx Dx Ex Fx x0 INK   0 @ P £ p …   Википедия

  • Continuous spectrum — The spectrum of a linear operator is commonly divided into three parts: point spectrum, continuous spectrum, and residual spectrum. If H is a topological vector space and is a linear map, the spectrum of A is the set of complex numbers λ such… …   Wikipedia

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