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spectrum of operator

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  • 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

  • Spectrum (arena) — The Spectrum The Spectrum America s Showplace Broad Street …   Wikipedia

  • Spectrum (disambiguation) — A spectrum is a condition or value that is not limited to a specific set of values but can vary infinitely within a continuum.Spectrum may refer to:In physical sciences: * electromagnetic spectrum ** visible spectrum or optical spectrum, a subset …   Wikipedia

  • Operator norm — In mathematics, the operator norm is a means to measure the size of certain linear operators. Formally, it is a norm defined on the space of bounded linear operators between two given normed vector spaces. Contents 1 Introduction and definition 2 …   Wikipedia

  • operator spectrum — operatoriaus spektras statusas T sritis fizika atitikmenys: angl. operator spectrum vok. Operatorspektrum, n rus. спектр оператора, m pranc. spectre d’un opérateur, m …   Fizikos terminų žodynas

  • spectrum — noun /ˈspektrəm,ˈspɛktrəm/ a) Specter, apparition. Current 3G technologies can send roughly 1 bit of data a one or a zero per second over each 1 Hz of spectrum that the operator owns. b) A range; a continuous, infinite, one dimensional set,… …   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

  • Mobile virtual network operator — A mobile virtual network operator (MVNO) is a company that provides mobile phone services but does not have its own licensed frequency allocation of radio spectrum, nor does it necessarily have all of the infrastructure required to provide mobile …   Wikipedia

  • Essential spectrum — In mathematics, the essential spectrum of a bounded operator is a certain subset of its spectrum, defined by a condition of the type that says, roughly speaking, fails badly to be invertible .The essential spectrum of self adjoint operatorsIn… …   Wikipedia

  • Almost Mathieu operator — In mathematical physics, the almost Mathieu operator arises in the study of the quantum Hall effect. It is given by: [H^{lambda,alpha} omega u] (n) = u(n+1) + u(n 1) + 2 lambda cos(2pi (omega + nalpha)) u(n), , acting as a self adjoint operator… …   Wikipedia

  • Self-adjoint operator — In mathematics, on a finite dimensional inner product space, a self adjoint operator is one that is its own adjoint, or, equivalently, one whose matrix is Hermitian, where a Hermitian matrix is one which is equal to its own conjugate transpose.… …   Wikipedia

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