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Locally compact space information


In topology and related branches of mathematics, a topological space is called locally compact if, roughly speaking, each small portion of the space looks like a small portion of a compact space. More precisely, it is a topological space in which every point has a compact neighborhood.

In mathematical analysis locally compact spaces that are Hausdorff are of particular interest; they are abbreviated as LCH spaces.[1]

  1. ^ Folland 1999, p. 131, Sec. 4.5.

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Locally compact space

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topological space is called locally compact if, roughly speaking, each small portion of the space looks like a small portion of a compact space. More precisely...

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mathematics, a locally compact group is a topological group G for which the underlying topology is locally compact and Hausdorff. Locally compact groups are...

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Compact space

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compactness is a property that seeks to generalize the notion of a closed and bounded subset of Euclidean space. The idea is that a compact space has...

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Compactly generated space

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Totally bounded space

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Locally convex topological vector space

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of mathematics, locally convex topological vector spaces (LCTVS) or locally convex spaces are examples of topological vector spaces (TVS) that generalize...

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Locally connected space

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while any compact Hausdorff space is locally compact, a connected space—and even a connected subset of the Euclidean plane—need not be locally connected...

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Radon measure

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restrict to locally compact Hausdorff spaces, and only consider the measures that correspond to positive linear functionals on the space of continuous...

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Locally compact quantum group

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physics, a locally compact quantum group is a relatively new C*-algebraic approach toward quantum groups that generalizes the Kac algebra, compact-quantum-group...

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Paracompact space

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topological space is locally finite iff its a locally finite cover of the underlying locale. Every compact space is paracompact. Every regular Lindelöf space is...

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Equicontinuity

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convergent sequence of continuous functions fn on either metric space or locally compact space is continuous. If, in addition, fn are holomorphic, then the...

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Symmetric space

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metric. Every compact Riemann surface of genus greater than 1 (with its usual metric of constant curvature −1) is a locally symmetric space but not a symmetric...

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Compact convergence

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{T}})} is a locally compact space, then f n → f {\displaystyle f_{n}\to f} compactly if and only if f n → f {\displaystyle f_{n}\to f} locally uniformly...

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Metrizable space

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Like all manifolds, it is locally homeomorphic to Euclidean space and thus locally metrizable (but not metrizable) and locally Hausdorff (but not Hausdorff)...

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Locally integrable function

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every compact subset of its domain of definition. The importance of such functions lies in the fact that their function space is similar to Lp spaces, but...

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Pontryagin duality

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finite-dimensional vector space over the reals or a p-adic field. The Pontryagin dual of a locally compact abelian group is the locally compact abelian topological...

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Hausdorff space

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to locally finite open covers. The Hausdorff versions of these statements are: every locally compact Hausdorff space is Tychonoff, and every compact Hausdorff...

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Countably compact space

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countably compact space is countably compact. Every countably compact space is pseudocompact. In a countably compact space, every locally finite family...

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Topological manifold

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Euclidean space. In particular, they are locally compact, locally connected, first countable, locally contractible, and locally metrizable. Being locally compact...

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Locally compact field

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In algebra, a locally compact field is a topological field whose topology forms a locally compact Hausdorff space. These kinds of fields were originally...

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Uniform convergence

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sequence is locally uniformly convergent. Every locally uniformly convergent sequence is compactly convergent. For locally compact spaces local uniform...

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Vanish at infinity

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to functions defined on normed vector spaces and the other applying to functions defined on locally compact spaces. Aside from this difference, both of...

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Topological vector space

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necessarily locally convex. Banach spaces, Hilbert spaces and Sobolev spaces are other well-known examples of TVSs. Many topological vector spaces are spaces of...

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Sheaf cohomology

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B;E)} is an isomorphism. Let X be a locally compact topological space. (In this article, a locally compact space is understood to be Hausdorff.) For a...

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Number line

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differentiable structure that the topological space supports.) The real line is a locally compact space and a paracompact space, as well as second-countable and normal...

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