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Nuclear operators between Banach spaces information


In mathematics, nuclear operators between Banach spaces are a linear operators between Banach spaces in infinite dimensions that share some of the properties of their counter-part in finite dimension. In Hilbert spaces such operators are usually called trace class operators and one can define such things as the trace. In Banach spaces this is no longer possible for general nuclear operators, it is however possible for -nuclear operator via the Grothendieck trace theorem.

The general definition for Banach spaces was given by Grothendieck. This article presents both cases but concentrates on the general case of nuclear operators on Banach spaces.

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Nuclear operators between Banach spaces

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In mathematics, nuclear operators between Banach spaces are a linear operators between Banach spaces in infinite dimensions that share some of the properties...

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Nuclear operator

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sets Nuclear operators between Banach spaces Nuclear space – A generalization of finite-dimensional Euclidean spaces different from Hilbert spaces Projective...

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Grothendieck trace theorem

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of a certain class of nuclear operators on Banach spaces, the so-called 2 3 {\displaystyle {\tfrac {2}{3}}} -nuclear operators. The theorem was proven...

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Trace class

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case of nuclear operators on Hilbert spaces and use the term "nuclear operator" in more general topological vector spaces (such as Banach spaces). Note...

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Rigged Hilbert space

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distributions. Also, a simple example is given by Sobolev spaces: Here (in the simplest case of Sobolev spaces on R n {\displaystyle \mathbb {R} ^{n}} ) H = L 2...

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Compact operator

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Grothendieck and Banach. The origin of the theory of compact operators is in the theory of integral equations, where integral operators supply concrete...

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Trace operator

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u\in H^{1}(\Omega )} is therefore continuous. Trace class Nuclear operators between Banach spaces Gagliardo, Emilio (1957). "Caratterizzazioni delle tracce...

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Lp space

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Riesz (Riesz 1910). Lp spaces form an important class of Banach spaces in functional analysis, and of topological vector spaces. Because of their key role...

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Auxiliary normed space

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constructing normed spaces from disks were systematically employed by Alexander Grothendieck to define nuclear operators and nuclear spaces. One method is...

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Integral linear operator

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cannot be an integral operator. Auxiliary normed spaces Final topology Injective tensor product Nuclear operators Nuclear spaces Projective tensor product...

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Topological vector space

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

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Spaces of test functions and distributions

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vector spaces (TVSs) that are particularly similar to finite-dimensional Euclidean spaces: the Banach spaces (especially Hilbert spaces) and the nuclear Montel...

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Dual norm

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inequality – Inequality between integrals in Lp spaces Lp space – Function spaces generalizing finite-dimensional p norm spaces Operator norm – Measure of the...

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Ultrabornological space

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spaces that are not ultrabornological. Every ultrabornological space X {\displaystyle X} is the inductive limit of a family of nuclear Fréchet spaces...

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John von Neumann

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compact operators, and preduality with bounded operators. The generalization of this topic to the study of nuclear operators on Banach spaces was among...

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Schatten norm

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Information, 2.3 Norms of operators, lecture notes, University of Waterloo, 2011. Joachim Weidmann, Linear operators in Hilbert spaces, Vol. 20. Springer, New...

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Integral transform

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compact operator acting on a Banach space of functions. Depending on the situation, the kernel is then variously referred to as the Fredholm operator, the...

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Fourier transform

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defines an isomorphism between the Banach space M(G) of finite Borel measures (see rca space) and a closed subspace of the Banach space C∞(Σ) consisting of...

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Glossary of functional analysis

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V W XYZ See also References See also: List of Banach spaces. * *-homomorphism between involutive Banach algebras is an algebra homomorphism preserving...

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Complete topological vector space

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are also metrizable include all F-spaces and consequently also all Fréchet spaces, Banach spaces, and Hilbert spaces. Prominent examples of complete TVS...

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Injective tensor product

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{\displaystyle X} ). The space of compact linear operators between any two Banach spaces (which includes Hilbert spaces) X {\displaystyle X} and Y {\displaystyle...

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Fredholm determinant

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dimensional linear operator. It is defined for bounded operators on a Hilbert space which differ from the identity operator by a trace-class operator. The function...

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Amenable group

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convolution by μ defines an operator of norm 1 on ℓ2(Γ) (Kesten). If Γ acts by isometries on a (separable) Banach space E and f in ℓ∞(Γ, E*) is a bounded...

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