EuDML | Browse

The search session has expired. Please query the service again.

Items

All a b c d e f g h i j k l m n o p q r s t u v w x y z Other

Displaying 241 – 260 of 693

Harmonic analysis and the geometry of subsets of Rn.

Guy David, Stephen Semmes (1991)

Publicacions Matemàtiques

This subject has several natural points of view, but we shall start with the one that corresponds to the following question: Is there something like Littlewood-Paley theory which is useful for analyzing the geometry of subsets of Rn, in much the same way that traditional Littlewood-Paley theory is good for analyzing functions and operators?

Harmonic analysis of the space BV.

Albert Cohen, Wolfgang Dahmen, Ingrid Daubechies, Ronald DeVore (2003)

Revista Matemática Iberoamericana

We establish new results on the space BV of functions with bounded variation. While it is well known that this space admits no unconditional basis, we show that it is almost characterized by wavelet expansions in the following sense: if a function f is in BV, its coefficient sequence in a BV normalized wavelet basis satisfies a class of weak-l1 type estimates. These weak estimates can be employed to prove many interesting results. We use them to identify the interpolation spaces between BV and Sobolev...

Higher integrability for maximal oscillatory Fourier integrals.

Walther, Björn Gabriel (2001)

Annales Academiae Scientiarum Fennicae. Mathematica

Higher Integrability Results.

M. Franciosi, G. Moscariello (1985)

Manuscripta mathematica

Higher integrability with weights.

Kinnunen, Juha (1994)

Annales Academiae Scientiarum Fennicae. Series A I. Mathematica

Hilbert transform, Toeplitz operators and Hankel operators and invariant A∞ weights.

Sergei Treil, Alexander Volberg, Dechao Zheng (1997)

Revista Matemática Iberoamericana

In this paper, several sufficient conditions for boundedness of the Hilbert transform between two weighted Lp-spaces are obtained. Invariant A∞ weights are obtained. Several characterizations of invariant A∞ weights are given. We also obtain some sufficient conditions for products of two Toeplitz operators of Hankel operators to be bounded on the Hardy space of the unit circle using Orlicz spaces and Lorentz spaces.

Hilbert transforms and maximal functions along rough flat curves.

Anthony Carbery, Sarah Ziesler (1994)

Revista Matemática Iberoamericana

Homeomorphisms preserving Ap.

Raymond L. Johnson, Christoph J. Neugebauer (1987)

Revista Matemática Iberoamericana

Ideal Weights: Assymptotically Optimal Versions of Doubling, Absolute Continuity, and Bounded Mean Oscillation.

Michael Brian Korey (1998)

The journal of Fourier analysis and applications [[Elektronische Ressource]]

Images of some functions and functional spaces under the Dunkl-Hermite semigroup

Néjib Ben Salem, Walid Nefzi (2013)

Commentationes Mathematicae Universitatis Carolinae

We propose the study of some questions related to the Dunkl-Hermite semigroup. Essentially, we characterize the images of the Dunkl-Hermite-Sobolev space, $𝒮 (ℝ)$ and $L_{α}^{p} (ℝ)$ , $1 < p < \infty$ , under the Dunkl-Hermite semigroup. Also, we consider the image of the space of tempered distributions and we give Paley-Wiener type theorems for the transforms given by the Dunkl-Hermite semigroup.

Inégalités à poids pour le projecteur de Bergman dans la boule unité de $C^{n}$

David Békollé (1982)

Studia Mathematica

Inégalités à poids pour l'opérateur de Hardy-Littlewood-Sobolev dans les espaces métriques mesurés à deux demi-dimensions

David Mascré (2006)

Colloquium Mathematicae

On a metric measure space (X,ϱ,μ), consider the weight functions $w_{α} (x) = ϱ {(x, z ₀)}^{- α ₀}$ if ϱ(x,z₀) < 1, $w_{α} (x) = ϱ {(x, z ₀)}^{- α ₁}$ if ϱ(x,z₀) ≥ 1, $w_{β} (x) = ϱ {(x, z ₀)}^{- β ₀}$ if ϱ(x,z₀) < 1, $w_{β} (x) = ϱ {(x, z ₀)}^{- β ₁}$ if ϱ(x,z₀) ≥ 1, where z₀ is a given point of X, and let $κ_{a} : X \times X \to ℝ ₊$ be an operator kernel satisfying $κ_{a} (x, y) \leq c ϱ {(x, y)}^{a - d}$ for all x,y ∈ X such that ϱ(x,y) < 1, $κ_{a} (x, y) \leq c ϱ {(x, y)}^{a - D}$ for all x,y ∈ X such that ϱ(x,y)≥ 1, where 0 < a < min(d,D), and d and D are respectively the local and global volume growth rate of the space X. We determine conditions on a, α₀, α₁, β₀, β₁ ∈ ℝ for the Hardy-Littlewood-Sobolev operator...

Inequalities for Poisson integrals with slowly growing dimensional constants.

Loukas Grafakos, Enrico Laeng, Carlo Morpurgo (2007)

Publicacions Matemàtiques

Inhomogenous Discrete Calderón Reproducing Formulas for Spaces of Homogenous Type.

Y. Han, S. Lu, D. Yang (2001)

The journal of Fourier analysis and applications [[Elektronische Ressource]]

Integral inequalities with weights for the Hardy maximal function

R. Kerman, A. Torchinsky (1982)

Studia Mathematica

Integral operators and weighted amalgams

C. Carton-Lebrun, H. Heinig, S. Hofmann (1994)

Studia Mathematica

For large classes of indices, we characterize the weights u, v for which the Hardy operator is bounded from $ℓ^{q ̅} (L_{v}^{p ̅})$ into $ℓ^{q} (L_{u}^{p})$ . For more general operators of Hardy type, norm inequalities are proved which extend to weighted amalgams known estimates in weighted $L^{p}$ -spaces. Amalgams of the form $ℓ^{q} (L_{w}^{p})$ , 1 < p,q < ∞ , q ≠ p, $w \in A_{p}$ , are also considered and sufficient conditions for the boundedness of the Hardy-Littlewood maximal operator and local maximal operator in these spaces are obtained.

Interpolation of Sobolev spaces, Littlewood-Paley inequalities and Riesz transforms on graphs.

N. Badr, E. Russ (2009)

Publicacions Matemàtiques

Intrinsic characterizations of distribution spaces on domains

V. Rychkov (1998)

Studia Mathematica

We give characterizations of Besov and Triebel-Lizorkin spaces $B_{p q}^{s} (Ω)$ and $F_{p q}^{s} (Ω)$ in smooth domains $Ω \subset ℝ^{n}$ via convolutions with compactly supported smooth kernels satisfying some moment conditions. The results for s ∈ ℝ, 0 < p,q ≤ ∞ are stated in terms of the mixed norm of a certain maximal function of a distribution. For s ∈ ℝ, 1 ≤ p ≤ ∞, 0 < q ≤ ∞ characterizations without use of maximal functions are also obtained.

Is the maximal function of a Lipschitz function continuous?

Buckley, Stephen M. (1999)

Annales Academiae Scientiarum Fennicae. Mathematica

John-Nirenberg lemmas for a doubling measure

Daniel Aalto, Lauri Berkovits, Outi Elina Kansanen, Hong Yue (2011)

Studia Mathematica

We study, in the context of doubling metric measure spaces, a class of BMO type functions defined by John and Nirenberg. In particular, we present a new version of the Calderón-Zygmund decomposition in metric spaces and use it to prove the corresponding John-Nirenberg inequality.

Currently displaying 241 – 260 of 693

Previous Page 13 Next