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almost periodic point

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  • 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

  • Periodic function — Not to be confused with periodic mapping, a mapping whose nth iterate is the identity (see periodic point). In mathematics, a periodic function is a function that repeats its values in regular intervals or periods. The most important examples are …   Wikipedia

  • periodic comet — noun A comet which orbits the Sun and which returns to the innermost point of its orbit at known, regular intervals. The computation of the elements of its orbit reveals the fact that they are almost identical with those of Comet III, 1869, and… …   Wiktionary

  • Lagrangian point — The Lagrangian points (IPA en|ləˈgreɪndʒiən, IPA fr|lagʁɑ̃ʒjɑ̃; also Lagrange point, L point, or libration point), are the five positions in an orbital configuration where a small object affected only by gravity can theoretically be stationary… …   Wikipedia

  • Hypokalemic periodic paralysis — Infobox Disease Name = Hypokalemic periodic paralysis Caption = DiseasesDB = 6465 ICD10 = ICD10|G|72|3|g|70 ICD9 = ICD9|359.3 ICDO = OMIM = 170400 MedlinePlus = eMedicineSubj = eMedicineTopic = MeshID = D020514 Hypokalemic periodic paralysis is a …   Wikipedia

  • Dynamical system — This article is about the general aspects of dynamical systems. For technical details, see Dynamical system (definition). For the study, see Dynamical systems theory. Dynamical redirects here. For other uses, see Dynamics (disambiguation). The… …   Wikipedia

  • Outer billiard — Outer Billiards is a dynamical system based on a convex shape in the plane. Classically, this system is defined for the Euclidean plane but one can also consider the system in the hyperbolic plane or in other spaces that suitably generalize the… …   Wikipedia

  • Fourier series — Fourier transforms Continuous Fourier transform Fourier series Discrete Fourier transform Discrete time Fourier transform Related transforms …   Wikipedia

  • Tent map — In mathematics, the tent map is an iterated function, in the shape of a tent, forming a discrete time dynamical system. It takes a point x n on the real line and maps it to another point:: x {n+1}=left{ egin{matrix} mu x n mathrm{for} x n …   Wikipedia

  • Fonction presque périodique — En mathématiques, et plus précisément en analyse, une fonction presque périodique est une application dont les propriétés ressemblent à celles d une fonction périodique. Sommaire 1 Motivation intuitive et définition de Bohr 2 Exemples et… …   Wikipédia en Français

  • Inner German border — Innerdeutsche Grenze North and central Germany …   Wikipedia

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