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We prove Strichartz estimates on any compact connected simple Lie group. In the diagonal case of Bourgain's exponents $p=q,$ we provide a new regularity order $s_{0}^{R}(p)$ in the sense that our (reverse) Strichartz estimates are valid…

偏微分方程分析 · 数学 2024-01-17 Duván Cardona , Brian Grajales , Michael Ruzhansky

In this paper we investigate the regularity properties of weighted Bergman projections for smoothly bounded pseudo-convex domains of finite type in $\mathbb{C}^{n}$. The main result is obtained for weights equal to a non negative rational…

复变函数 · 数学 2013-05-24 Philippe Charpentier , Yves Dupain , Modi Mounkaila

Let $\mathcal{M}$ be a smooth submanifold of $\mathbb{R}^n$ equipped with the Euclidean (chordal) metric. This note considers the smallest dimension $m$ for which there exists a bi-Lipschitz function $f: \mathcal{M} \mapsto \mathbb{R}^m$…

数值分析 · 数学 2021-05-31 Mark Iwen , Arman Tavakoli , Benjamin Schmidt

We prove sharp stability estimates for the variation of the eigenvalues of non-negative self-adjoint elliptic operators of arbitrary even order upon variation of the open sets on which they are defined. These estimates are expressed in…

谱理论 · 数学 2012-10-15 Victor Burenkov , Pier Domenico Lamberti

This paper is concerned with an explicit value of the embedding constant from $W^{1,q}(\Omega)$ to $L^{p}(\Omega)$ for a bounded domain $\Omega\subset\mathbb{R}^N~(N\in\mathbb{N})$, where $1\leq q\leq p\leq \infty$. To obtain this value, we…

泛函分析 · 数学 2016-09-19 Makoto Mizuguchi , Kazuaki Tanaka , Kouta Sekine , Shin'ichi Oishi

We consider Einstein gravity on a patch of AdS$_3$ spacetime between two radii $r_1, r_2$. We compute surface charges and their algebra at an arbitrary radius $r$ such that it reduces to a given set of surface charges at $r_1, r_2$. The…

高能物理 - 理论 · 物理学 2020-06-24 H. Adami , V. Hosseinzadeh , M. M. Sheikh-Jabbari

We study here limit spaces $(M_\alpha,g_\alpha,p_\alpha)\stackrel{GH}{\rightarrow} (Y,d_Y,p)$, where the $M_\alpha$ have a lower Ricci curvature bound and are volume noncollapsed. Such limits $Y$ may be quite singular, however it is known…

微分几何 · 数学 2011-11-10 Tobias Holck Colding , Aaron Naber

We obtain an upper bound on the lowest magnetic Neumann eigenvalue of a bounded, convex, smooth, planar domain with moderate intensity of the homogeneous magnetic field. This bound is given as a product of a purely geometric factor…

谱理论 · 数学 2023-12-12 Ayman Kachmar , Vladimir Lotoreichik

In this paper we provide a priori error estimates in standard Sobolev (semi-)norms for approximation in spline spaces of maximal smoothness on arbitrary grids. The error estimates are expressed in terms of a power of the maximal grid…

数值分析 · 数学 2019-07-09 Espen Sande , Carla Manni , Hendrik Speleers

We prove observability estimates for the Schr\"odinger equation posed on the equilateral triangle in the plane, under both Neumann and Dirichlet boundary conditions. No geometric control condition is required on the rough localization…

偏微分方程分析 · 数学 2025-09-30 Paul Alphonse , David Lafontaine

This paper concentrates on the quantitative homogenization of higher-order elliptic systems with almost-periodic coefficients in bounded Lipschitz domains. For coefficients which are almost-periodic in the sense of H. Weyl, we establish…

偏微分方程分析 · 数学 2020-01-30 Yao Xu , Weisheng Niu

We establish sharp bounds for simultaneous local rotation and H\"older-distortion of planar quasiconformal maps. In addition, we give sharp estimates for the corresponding joint quasiconformal multifractal spectrum, based on new estimates…

复变函数 · 数学 2015-08-24 Kari Astala , Tadeusz Iwaniec , István Prause , Eero Saksman

We consider a spectral stability estimate by Burenkov and Lamberti concerning the variation of the eigenvalues of second order uniformly elliptic operators on variable open sets in the N-dimensional euclidean space, and we prove that it is…

谱理论 · 数学 2010-12-24 Pier Domenico Lamberti , Marco Perin

We obtain a full asymptotic expansion for orthogonal polynomials with respect to weighted area measure on a Jordan domain $\mathscr{D}$ with real-analytic boundary. The weight is fixed and assumed to be real-analytically smooth and strictly…

复变函数 · 数学 2020-08-28 Haakan Hedenmalm , Aron Wennman

This survey hinges on the interplay between regularity and approximation for linear and quasi-linear fractional elliptic problems on Lipschitz domains. For the linear Dirichlet integral Laplacian, after briefly recalling H\"older regularity…

数值分析 · 数学 2023-01-02 Juan Pablo Borthagaray , Wenbo Li , Ricardo H. Nochetto

We prove a new kind of estimate that holds on any manifold with lower Ricci bounds. It relates the geometry of two small balls with the same radius, potentially far apart, but centered in the interior of a common minimizing geodesic. It…

微分几何 · 数学 2011-09-23 Tobias Colding , Aaron Naber

In $\mathbb{R}^n$, we establish an asymptotically sharp upper bound for the upper Minkowski dimension of $k$-porous sets having holes of certain size near every point in $k$ orthogonal directions at all small scales. This bound tends to…

经典分析与常微分方程 · 数学 2017-01-31 Esa Järvenpää , Maarit Järvenpää , Antti Käenmäki , Ville Suomala

In this paper, we consider an incompressible viscous flow without surface tension in a finite-depth domain of three dimensions, with free top boundary and fixed bottom boundary. This system is governed by a Naiver-Stokes equation in above…

偏微分方程分析 · 数学 2012-12-11 Lei Wu

In this article we extend several foundational results of the theory of complete minimal surfaces of finite index in the Euclidean space to minimal surfaces in asymptotically flat manifolds and, more generally, to marginally outer-trapped…

微分几何 · 数学 2014-04-08 Alessandro Carlotto

This work considers an Inertial version of Bregman Proximal Gradient algorithm (IBPG) for minimizing the sum of two single-valued functions in finite dimension. We suppose that one of the functions is proper, closed, and convex but…

最优化与控制 · 数学 2025-01-30 Jean-Jacques Godeme