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This paper deals with the $L_p$-spectrum of Schr\"odinger operators on the hyperbolic plane. We establish Lieb-Thirring type inequalities for discrete eigenvalues and study their dependence on $p$. Some bounds on individual eigenvalues are…

谱理论 · 数学 2019-07-24 Marcel Hansmann

We prove Lieb-Thirring inequalities for Schr\"odinger operators with a homogeneous magnetic field in two and three space dimensions. The inequalities bound sums of eigenvalues by a semi-classical approximation which depends on the strength…

谱理论 · 数学 2015-05-27 Rupert L. Frank , Rikard Olofsson

In this short paper we generalize the classical inequality between the norms in Lebesgue spaces of the functions and its derivatives, which in the multidimensional case are called Sobolev's inequalities, on the many popular classes pairs of…

泛函分析 · 数学 2010-02-01 E. Ostrovsky , E. Rogover , L. Sirota

We introduce and develop a theory of orthogonality with respect to Sobolev inner products on the real line for sequences of functions with a tridiagonal, skew-Hermitian differentiation matrix. While a theory of such L2-orthogonal systems is…

经典分析与常微分方程 · 数学 2022-06-16 Arieh Iserles , Marcus Webb

We establish a set of relations between several quite diverse types of weighted inequalities involving various integral operators and fairly general quasinorm-like functionals which we call sub-monotone. The main result enables one to solve…

经典分析与常微分方程 · 数学 2025-03-13 Amiran Gogatishvili , Luboš Pick

We prove on the sphere $\mathbb{S}^2$ the Lieb--Thirring inequalities for orthonormal families of scalar and vector functions both on the whole sphere and on proper domains on $\mathbb{S}^2$. By way of applications we obtain an explicit…

偏微分方程分析 · 数学 2018-04-26 Alexei Ilyin , Ari Laptev

The main aim of this book is to present recent results concerning inequalities for continuous functions of selfadjoint operators on complex Hilbert spaces. It is intended for use by both researchers in various fields of Linear Operator…

泛函分析 · 数学 2012-03-09 Silvestru Sever Dragomir

In this paper we prove Lieb--Thirring inequalities for magnetic Schr\"odinger operators on the torus, where the constants in the inequalities depend on the magnetic flux.

谱理论 · 数学 2023-06-01 Alexei Ilyin , Ari Laptev

In this paper we introduce a new technique for proving norm inequalities in operator ideals with an unitarily invariant norm. Among the well known inequalities which can be proved with this technique are the L\"owner-Heinz inequality,…

算子代数 · 数学 2008-08-19 Gabriel Larotonda

A mapping M(t) is considered to obtain some preliminary results and a new trapezoidal form of Fejer inequality related to the h-convex functions. Furthermore the obtained results are applied to achieve some new inequalities in connection…

泛函分析 · 数学 2019-02-19 M. Rostamian Delavar , S. S. Dragomir

We give several functional inequalities related to the Ornstein-Uhlenbeck semigroup in the Dunkl differential-difference operators setting. As an application of these inequalities, we derive out a Sobolev-logarithmic and an…

泛函分析 · 数学 2023-12-05 Mostafa Maslouhi , El houssain Lamine

In the paper we prove several inequalities involving two isotonic linear functionals. We consider inequalities for functions with variable bounds, for Lipschitz and H\" older type functions etc. These results give us an elegant method for…

泛函分析 · 数学 2016-12-02 Mea Bombardelli , Ludmila Nikolova , Sanja Varošanec

In this article we establish Bohr inequalities for operator valued functions, which can be viewed as the analogues of a couple of interesting results from scalar valued settings. Some results of this paper are motivated by the classical…

复变函数 · 数学 2021-01-12 Bappaditya Bhowmik , Nilanjan Das

In this article, we study the problem of obtaining Lebesgue space inequalities for the Fourier restriction operator associated to rectangular pieces of the paraboloid and perturbations thereof. We state a conjecture for the dependence of…

经典分析与常微分方程 · 数学 2019-11-27 Jeremy Schwend , Betsy Stovall

We establish some monotonicity results and functional inequalities for modified Lommel functions of the first kind. In particular, we obtain new Tur\'{a}n type inequalities and bounds for ratios of modified Lommel functions of the first…

经典分析与常微分方程 · 数学 2021-10-13 Robert E. Gaunt

Inequalities play an important role in pure and applied mathematics. In particular, Opial inequality plays a main role in the study of the existence and uniqueness of initial and boundary value problems for differential equations. It has…

经典分析与常微分方程 · 数学 2022-04-22 Ana Portilla , José M. Rodríguez , José M. Sigarreta

We attempt to survey recent results and open problems connected to Lieb-Thirring inequalities.

数学物理 · 物理学 2020-07-21 Rupert L. Frank

We derive Lieb-Thirring inequalities for the Riesz means of eigenvalues of order gamma >= 3/4 for fourth order Schr\"odinger operators in arbitrary dimensions. We also consider some extensions to polyharmonic operators, and to systems of…

数学物理 · 物理学 2007-05-23 Clemens Förster , Jörgen Östensson

In this paper, we provide the sufficient and necessary conditions for the symmetry of the following stable L\'evy-type operator $\mathcal{L}$ on $\mathbb{R}$: $$\mathcal{L}=a(x){\Delta^{\alpha/2}}+b(x)\frac{\d}{\d x},$$ where $a,b$ are the…

概率论 · 数学 2024-02-21 Lu-Jing Huang , Tao Wang

We study to what extent Lieb--Thirring inequalities are extendable from self-adjoint to general (possibly non-self-adjoint) Jacobi and Schr\"{o}dinger operators. Namely, we prove the conjecture of Hansmann and Katriel from [Complex Anal.…

谱理论 · 数学 2020-04-22 Sabine Bögli , František Štampach