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We prove several results about the best constants in the Hausdorff-Young inequality for noncommutative groups. In particular, we establish a sharp local central version for compact Lie groups, and extend known results for the Heisenberg…

泛函分析 · 数学 2020-11-10 Michael G. Cowling , Alessio Martini , Detlef Müller , Javier Parcet

The generalized Young inequality on the Lorentz spaces for commutative hypergroups is introdused and an application of it is given to the theory of fractional integrals. The boundedness on the Lorentz space and the Hardy-Littlewood-Sobolev…

泛函分析 · 数学 2013-07-19 Mubariz G. Hajibayov

We give some new refinements and reverses Young inequalities in both additive-type and multiplicative-type for two positive numbers/operators. We show our advantages by comparing with known results. A few applications are also given. Some…

泛函分析 · 数学 2018-03-26 Shigeru Furuichi , Hamid Reza Moradi

An important connection between the finite dimensional Gaussian Wick product and Lebesgue convolution product will be proven first. Then this connection will be used to prove an important H\"older inequality for the norms of Gaussian Wick…

概率论 · 数学 2011-01-18 Paolo Da Pelo , Alberto Lanconelli , Aurel I. Stan

Young's inequality is extended to the context of absolutely continuous measures. Several applications are included.

经典分析与常微分方程 · 数学 2011-09-28 Flavia Corina Mitroi , Constantin P. Niculescu

We give a new proof of certain cases of the sharp HLS inequality. Instead of symmetric decreasing rearrangement it uses the reflection positivity of inversions in spheres. In doing this we extend a characterization of the minimizing…

泛函分析 · 数学 2011-09-05 Rupert L. Frank , Elliott H. Lieb

In this paper, we study refinements of some inequalities related to Young inequality for scalar and for operator. As our main results, we show refined Young inequalities for two positive operators. This results refine the ordering relations…

泛函分析 · 数学 2012-01-27 Shigeru Furuichi , Minghua Lin

A criterion is established for the validity of multilinear inequalities of a class considered by Brascamp and Lieb, generalizing well-known inequalities of Holder, Young, and Loomis-Whitney. This is a companion to a recent paper by the same…

经典分析与常微分方程 · 数学 2007-05-23 Jonathan Bennett , Anthony Carbery , Michael Christ , Terence Tao

We obtain Hausdorff-Young inequalities for the one-dimensional Cherednik--Opdam transform and its inverse, and we establish a real Paley-Wiener theorem for its inverse that generalizes an analogous result by N. B. Andersen for the Jacobi…

经典分析与常微分方程 · 数学 2015-02-05 Troels Roussau Johansen

We review and formulate results concerning log-concavity and strong-log-concavity in both discrete and continuous settings. We show how preservation of log-concavity and strongly log-concavity on $\mathbb{R}$ under convolution follows from…

统计理论 · 数学 2014-04-24 Adrien Saumard , Jon A. Wellner

A considerable amount of literature in the theory of inequality is devoted to the study of Jensen's and Young's inequality. This article presents a number of new inequalities involving the log-convex functions and the geometrically convex…

经典分析与常微分方程 · 数学 2022-02-10 Shigeru Furuichi , Hamid Reza Moradi , Supriyo Dutta

We run an iteration argument due to Pramanik and Seeger, to provide a proof of sharp decoupling inequalities for conical surfaces and for $k$-cones. These are extensions of results \L aba and Pramanik to sharp exponents.

经典分析与常微分方程 · 数学 2020-02-19 Shaoming Guo , Changkeun Oh

The Sinc convolution is an approximate formula for indefinite convolutions proposed by Stenger. The formula was derived based on the Sinc indefinite integration formula combined with the single-exponential transformation. Although its…

数值分析 · 数学 2026-01-21 Tomoaki Okayama

The Riesz-Sobolev inequality provides an upper bound, in integral form, for the convolution of indicator functions of subsets of Euclidean space. We formulate and prove a sharper form of the inequality. This can be equivalently phrased as a…

经典分析与常微分方程 · 数学 2017-06-08 Michael Christ

In this paper, we give a new inequality for convex functions of real variables, and we apply this inequality to obtain considerable generalizations, refinements, and reverses of the Young and Heinz inequalities for positive scalars.…

泛函分析 · 数学 2017-03-23 Yousef Al-Manasrah , Fuad Kittaneh

We give a short proof of a reverse isoperimetric inequality due to Y. Groman and J. P. Solomon.

复变函数 · 数学 2015-02-18 Julien Duval

In this paper, we generalize Young's inequality for locally compact quantum groups and obtain some results for extremal pairs of Young's inequality and extremal functions of Hausdorff-Young inequality.

算子代数 · 数学 2016-11-16 Zhengwei Liu , Simeng Wang , Jinsong Wu

We give a simpler proof of the sharp Frank-Lieb inequality on the Heisenberg group. The proof bypasses the sophisticated argument for existence of a minimizer and is based on the study of the 2nd variation of subcritical functionals using…

偏微分方程分析 · 数学 2022-11-24 Fengbo Hang , Xiaodong Wang

The inverse tangent function can be bounded by different inequalities, for example by Shafer's inequality. In this publication, we propose a new sharp double inequality, consisting of a lower and an upper bound, for the inverse tangent…

信息论 · 计算机科学 2013-07-19 Gholamreza Alirezaei

The more then hundred years old Bernstein inequality states that the supremum norm of the derivative of a trigonometric polynomial of fixed degree can be bounded from above by supremum norm of the polynomial itself. The reversed Bernstein…

经典分析与常微分方程 · 数学 2023-03-09 Parvaneh Joharinad , Jürgen Jost , Sunhyuk Lim , Rostislav Matveev