An optimal endpoint trace embedding

Andrea Cianchi; Luboš Pick

Displaying similar documents to “An optimal endpoint trace embedding”

Anisotropic Hölder and Sobolev spaces for hyperbolic diffeomorphisms

Viviane Baladi, Masato Tsujii (2007)

Annales de l’institut Fourier

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We study spectral properties of transfer operators for diffeomorphisms $T : X \to X$ on a Riemannian manifold $X$ . Suppose that $Ω$ is an isolated hyperbolic subset for $T$ , with a compact isolating neighborhood $V \subset X$ . We first introduce Banach spaces of distributions supported on $V$ , which are anisotropic versions of the usual space of $C^{p}$ functions $C^{p} (V)$ and of the generalized Sobolev spaces $W^{p, t} (V)$ , respectively. We then show that the transfer operators associated to $T$ and a smooth weight $g$ extend boundedly to these...

A capacity approach to the Poincaré inequality and Sobolev imbeddings in variable exponent Sobolev spaces.

Petteri Harjulehto, Peter Hästö (2004)

Revista Matemática Complutense

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We study the Poincaré inequality in Sobolev spaces with variable exponent. Under a rather mild and sharp condition on the exponent p we show that the inequality holds. This condition is satisfied e.g. if the exponent p is continuous in the closure of a convex domain. We also give an essentially sharp condition for the exponent p as to when there exists an imbedding from the Sobolev space to the space of bounded functions.

Sharp embeddings of Besov spaces with logarithmic smoothness.

Petr Gurka, Bohumir Opic (2005)

Revista Matemática Complutense

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We prove sharp embeddings of Besov spaces B with the classical smoothness σ and a logarithmic smoothness α into Lorentz-Zygmund spaces. Our results extend those with α = 0, which have been proved by D. E. Edmunds and H. Triebel. On page 88 of their paper (Math. Nachr. 207 (1999), 79-92) they have written: ?Nevertheless a direct proof, avoiding the machinery of function spaces, would be desirable.? In our paper we give such a proof even in a more general context. We cover...

Neumann problems associated to nonhomogeneous differential operators in Orlicz–Sobolev spaces

Mihai Mihăilescu, Vicenţiu Rădulescu (2008)

Annales de l’institut Fourier

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We study a nonlinear Neumann boundary value problem associated to a nonhomogeneous differential operator. Taking into account the competition between the nonlinearity and the bifurcation parameter, we establish sufficient conditions for the existence of nontrivial solutions in a related Orlicz–Sobolev space.

Variable Besov and Triebel--Lizorkin spaces.

Xu, Jingshi (2008)

Annales Academiae Scientiarum Fennicae. Mathematica

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Sharp estimates of the embedding constants for Besov spaces bsp,q, 0 < p < 1,.

David E. Edmunds, Evans, W. Desmond, Gyorgi E. Karadzhov (2007)

Revista Matemática Complutense

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Coercive inequalities on weighted Sobolev spaces

Agnieszka Kałamajska (1993)

Colloquium Mathematicae

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Construction of Sobolev spaces of fractional order with sub-riemannian vector fields

Sami Mustapha, François Vigneron (2007)

Annales de l’institut Fourier

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Given a smooth family of vector fields satisfying Chow-Hörmander’s condition of step 2 and a regularity assumption, we prove that the Sobolev spaces of fractional order constructed by the standard functional analysis can actually be “computed” with a simple formula involving the sub-riemannian distance. Our approach relies on a microlocal analysis of translation operators in an anisotropic context. It also involves classical estimates of the heat-kernel associated to the...