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Displaying 61 – 75 of 75

Unions of arcs from Fourier partial sums.

Courtney, Dennis (2010)

The New York Journal of Mathematics [electronic only]

Unique continuation for the solutions of the laplacian plus a drift

Alberto Ruiz, Luis Vega (1991)

Annales de l'institut Fourier

We prove unique continuation for solutions of the inequality $| Δ u (x) | \leq V (x) | \nabla u (x) |$ , $x \in Ω$ a connected set contained in $R^{n}$ and $V$ is in the Morrey spaces $F^{α, p}$ , with $p \geq (n - 2) / 2 (1 - α)$ and $α < 1$ . These spaces include $L^{q}$ for $q \geq (3 n - 2) / 2$ (see [H], [BKRS]). If $p = (n - 2) / 2 (1 - α)$ , the extra assumption of $V$ being small enough is needed.

Unique Disintegration of Arbitraty Positive Definite Functions on *-divisible Semigroups.

Paul Ressel, Torben M. Bisgaard (1988/1989)

Mathematische Zeitschrift

Unique Reconstruction of Band-limited Signals by a Mallat-Zhong Wavelet Transform Algorithm.

C.J. Kicey, C.J. Lennard (1997)

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

Uniqueness of two-parameter dyadic martingales and Walsh-Fourier series.

Weisz, Ferenc (1998)

Mathematica Pannonica

Uniqueness, strong forms of uniqueness and negative powers of contractions

Jean Esterle (1994)

Banach Center Publications

Uniqueness theorems for Cauchy integrals

M. Melnikov, A. Poltoratski, A. Volberg (2008)

Publicacions Matemàtiques

Unitary Mappings Between Multiresolution Analyses of L... (R) and a Parametrization of Low-Pass Filters.

Manos Papadakis (1998)

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

Universal series by trigonometric system in weighted $L_{μ}^{1}$ spaces.

Episkoposian, S.A. (2006)

International Journal of Mathematics and Mathematical Sciences

Universal simultaneous approximations of the coefficient functionals

Petr Přikryl (1977)

Časopis pro pěstování matematiky

Universal Spectra and Tijdeman's Conjecture on Factorization of Cyclic Groups.

S. Szabó, J.C. Lagarias (2001)

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

Universal Teichmüller space and Fourier series.

Krzyż, Jan G. (1995)

Annales Academiae Scientiarum Fennicae. Series A I. Mathematica

Universally divergent Fourier series via Landau's extremal functions

Gerd Herzog, Peer Chr. Kunstmann (2015)

Commentationes Mathematicae Universitatis Carolinae

We prove the existence of functions $f \in A (𝔻)$ , the Fourier series of which being universally divergent on countable subsets of $𝕋 = \partial 𝔻$ . The proof is based on a uniform estimate of the Taylor polynomials of Landau’s extremal functions on $𝕋 ∖ {1}$ .

Upper bounds for certain trigonometric sums involving cosine powers

Anastasios D. Simalarides (2015)

Colloquium Mathematicae

We establish upper bounds for certain trigonometric sums involving cosine powers. Part of these results extend previous ones valid for the sum $\sum_{m = 1}^{k - 1} | s i n (π r m / k) | / s i n (π m / k)$ . We apply our results to estimate character sums in an explicit and elementary way.

Utilisation des produits de Riesz pour minorer la dimension de Hausdorff de certains ensembles.

J. PEYRIERE (1973/1974)

Seminaire de Théorie des Nombres de Bordeaux

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