almost periodic

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• Almost periodic function — In mathematics, almost periodic functions are functions of a real number that are periodic up to a small error, first studied by Harald Bohr. There are generalizations to almost periodic functions on locally compact abelian groups. Almost… …   Wikipedia

• almost-periodic quantity — kvaziperiodinis dydis statusas T sritis fizika atitikmenys: angl. almost periodic quantity; quasi periodic quantity vok. fast periodische Größe, f; quasiperiodische Größe, f rus. квазипериодическая величина, f; почти периодическая величина, f… …   Fizikos terminų žodynas

• almost periodic function — Math. a function that repeats its values approximately at almost equally spaced intervals of its domain. * * * …   Universalium

• almost periodic function — Math. a function that repeats its values approximately at almost equally spaced intervals of its domain …   Useful english dictionary

• 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 table — This article is about the periodic table of the elements . For other uses, see The Periodic Table. The periodic table of the chemical elements (also known as the periodic table or periodic table of the elements) is a tabular display of the 118… …   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

• quasi-periodic quantity — kvaziperiodinis dydis statusas T sritis fizika atitikmenys: angl. almost periodic quantity; quasi periodic quantity vok. fast periodische Größe, f; quasiperiodische Größe, f rus. квазипериодическая величина, f; почти периодическая величина, f… …   Fizikos terminų žodynas

• History of the periodic table — The history of the periodic table reflects over a century of growth in the understanding of chemical properties, and culminates with the publication of the first actual periodic table by Dmitri Mendeleev in 1869.[1] While Mendeleev built upon… …   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