Pontryagin duality

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• Pontryagin duality — In mathematics, in particular in harmonic analysis and the theory of topological groups, Pontryagin duality explains the general properties of the Fourier transform. It places in a unified context a number of observations about functions on the… …   Wikipedia

• Duality (mathematics) — In mathematics, a duality, generally speaking, translates concepts, theorems or mathematical structures into other concepts, theorems or structures, in a one to one fashion, often (but not always) by means of an involution operation: if the dual… …   Wikipedia

• Tannaka–Krein duality — In mathematics, Tannaka–Krein duality theory concerns the interaction of a compact topological group and its category of linear representations. Its natural extension to the non Abelian case is the Grothendieck duality theory. It extends an… …   Wikipedia

• Tannaka-Krein duality — In mathematics, Tannaka Krein duality theory concerns the interaction of a compact topological group and its category of linear representations. It extends an important mathematical duality between compact and discrete commutative topological… …   Wikipedia

• Lev Pontryagin — Lev Semenovich Pontryagin (Russian: Лев Семёнович Понтрягин) (3 September 1908 ndash; 3 May 1988) was a Soviet Russian mathematician. He was born in Moscow and lost his eyesight in a primus stove explosion when he was 14. Despite his blindness he …   Wikipedia

• Dualité de Pontryagin — En mathématiques, notamment en analyse harmonique et dans la théorie des groupes topologiques, la dualité de Pontryagin explique les principales propriétés de la transformée de Fourier. Elle place dans un cadre plus général certaines observations …   Wikipédia en Français

• S-duality — In theoretical physics, S duality (also a strong weak duality) is an equivalence of two quantum field theories, string theories, or M theory. An S duality transformation maps the states and vacua with coupling constant g in one theory to states… …   Wikipedia

• Alexander duality — In mathematics, Alexander duality refers to a duality theory presaged by a result of 1915 by J. W. Alexander, and subsequently further developed, particularly by P. S. Alexandrov and Lev Pontryagin. It applies to the homology theory properties of …   Wikipedia

• Fourier analysis — In mathematics, Fourier analysis is a subject area which grew out of the study of Fourier series. The subject began with trying to understand when it was possible to represent general functions by sums of simpler trigonometric functions. The… …   Wikipedia

• Стереотипное пространство — В функциональном анализе и связанных областях математики стереотипные пространства представляют собой класс топологических векторных пространств, выделяемый неким специальным условием рефлексивности. Этот класс обладает серией замечательных… …   Википедия

• Fourier transform — Fourier transforms Continuous Fourier transform Fourier series Discrete Fourier transform Discrete time Fourier transform Related transforms The Fourier transform is a mathematical operation that decomposes a function into its constituent… …   Wikipedia