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Locally convex topological vector space information


In functional analysis and related areas of mathematics, locally convex topological vector spaces (LCTVS) or locally convex spaces are examples of topological vector spaces (TVS) that generalize normed spaces. They can be defined as topological vector spaces whose topology is generated by translations of balanced, absorbent, convex sets. Alternatively they can be defined as a vector space with a family of seminorms, and a topology can be defined in terms of that family. Although in general such spaces are not necessarily normable, the existence of a convex local base for the zero vector is strong enough for the Hahn–Banach theorem to hold, yielding a sufficiently rich theory of continuous linear functionals.

Fréchet spaces are locally convex spaces that are completely metrizable (with a choice of complete metric). They are generalizations of Banach spaces, which are complete vector spaces with respect to a metric generated by a norm.

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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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Topological vector space

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In mathematics, a topological vector space (also called a linear topological space and commonly abbreviated TVS or t.v.s.) is one of the basic structures...

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Normed vector space

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put it more abstractly every seminormed vector space is a topological vector space and thus carries a topological structure which is induced by the semi-norm...

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Reflexive space

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mathematics known as functional analysis, a reflexive space is a locally convex topological vector space for which the canonical evaluation map from X {\displaystyle...

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Complete topological vector space

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analysis and related areas of mathematics, a complete topological vector space is a topological vector space (TVS) with the property that whenever points get...

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Metrizable topological vector space

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pseudometrizable) topological vector space (TVS) is a TVS whose topology is induced by a metric (resp. pseudometric). An LM-space is an inductive limit...

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Banach space

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Distortion problem Interpolation space Locally convex topological vector space – A vector space with a topology defined by convex open sets Modulus and characteristic...

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Convex set

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(Dieudonné). Let A and B be non-empty, closed, and convex subsets of a locally convex topological vector space such that rec ⁡ A ∩ rec ⁡ B {\displaystyle \operatorname...

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Complete metric space

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Fréchet space: a locally convex topological vector space whose topology can be induced by a complete translation-invariant metric. The space Qp of p-adic...

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Sequence space

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is Fréchet, meaning that it is a complete, metrizable, locally convex topological vector space (TVS). However, this topology is rather pathological: there...

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Connected space

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is one of the principal topological properties that are used to distinguish topological spaces. A subset of a topological space X {\displaystyle X} is...

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Convex hull

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generally in a locally convex topological vector space) is the convex hull of its extreme points. However, this may not be true for convex sets that are...

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Barrelled space

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zero vector. A barrelled set or a barrel in a topological vector space is a set that is convex, balanced, absorbing, and closed. Barrelled spaces are studied...

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Topological tensor product

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products (see Tensor product of Hilbert spaces), but for general Banach spaces or locally convex topological vector spaces the theory is notoriously subtle....

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Lp space

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usual vector space topology of R n , {\displaystyle \mathbb {R} ^{n},} hence ℓ n p {\displaystyle \ell _{n}^{p}} is a locally convex topological vector space...

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Seminorm

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topological vector space is locally convex if and only if its topology is induced by a family of seminorms. Let X {\displaystyle X} be a vector space...

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Nuclear space

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A nuclear space is a locally convex topological vector space A {\displaystyle A} such that for every locally convex topological vector space B {\displaystyle...

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Bornological space

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(topological vector space) – Generalization of boundedness Locally convex topological vector space – A vector space with a topology defined by convex open...

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Hilbert space

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spaces L-semi-inner product – Generalization of inner products that applies to all normed spaces Locally convex topological vector space – A vector space...

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Locally connected space

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generally, every locally convex topological vector space is locally connected, since each point has a local base of convex (and hence connected) neighborhoods...

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Mackey space

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mathematics, particularly in functional analysis, a Mackey space is a locally convex topological vector space X such that the topology of X coincides with the Mackey...

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Totally bounded space

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topological vector spaces; it dates to a 1935 paper of John von Neumann. This definition has the appealing property that, in a locally convex space endowed...

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Topological space

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expressed the idea that a surface is a topological space that is locally like a Euclidean plane. Topological spaces were first defined by Felix Hausdorff...

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