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For some smooth special case of generalized $\varphi-$divergences as well as of new divergences (called scaled shift divergences), we derive approximations of the omnipresent (weighted) $\ell_{1}-$distance and (weighted) $\ell_{1}-$norm.

General Mathematics · Mathematics 2025-11-04 Pierre Bertrand , Wolfgang Stummer

We consider M-estimators and derive supremal-inequalities of exponential-or polynomial type according as a boundedness- or a moment-condition is fulfilled. This enables us to derive rates of r-complete convergence and also to show r-qick…

Statistics Theory · Mathematics 2023-11-30 Dietmar Ferger

In this work, we tackle the higher regularity estimates of solutions to inhomogeneous $\infty-$Laplacian equations at interior critical points. Our estimates provide smoothness properties better than the corresponding available regularity…

Analysis of PDEs · Mathematics 2025-04-29 João Vitor da Silva , Makson S. Santos , Mayra Soares

In this paper we classify a kind of special Calabi hypersurfaces with negative constant sectional curvature in Calabi affine geometry. Meanwhile, we find a class of new Euclidean complete and Calabi complete affine hypersurfaces, which…

Differential Geometry · Mathematics 2025-04-23 Yalin Sun , Ruiwei Xu

Making use of integral representations, we develop a unified approach to establish blow up profiles, compactness and existence of positive solutions of the conformally invariant equations $P_\sigma(v)= Kv^{\frac{n+2\sigma}{n-2\sigma}}$ on…

Analysis of PDEs · Mathematics 2014-11-24 Tianling Jin , YanYan Li , Jingang Xiong

The geodesic total curvature of rectifiable spherical curves is analyzed. We extend to the case of high dimension spheres the explicit formula that holds true for curves supported into the 2-sphere. For this purpose, we take advantage of…

Differential Geometry · Mathematics 2023-03-13 Domenico Mucci , Alberto Saracco

This paper is in relation with a Note of "Comptes Rendus de l'Academie des Sciences" 2005. We have an idea about a lower bounds of sup+inf (2 dimensions) and sup*inf (dimensions >2).

Analysis of PDEs · Mathematics 2007-05-23 Samy Skander Bahoura

We prove a priori interior curvature estimates for hypersurfaces of prescribing scalar curvature equations in dimension three. The method is motivated by the integral method of Warren and Yuan. The new observation here is that the…

Analysis of PDEs · Mathematics 2025-09-29 Guohuan Qiu

The most used form of the Shallow Water Equations doesn't take into account the variation of the curvature of the base flow surface. In this paper, we compare the theoretical and numerical solutions of the standard model and with the…

Fluid Dynamics · Physics 2023-04-25 Stelian Ion , Dorin Marinescu , Stefan Gicu Cruceanu

The aim of this article is to study expansions of solutions to an extremal metric type equation on the blow-up of constant scalar curvature K\"ahler surfaces. This is related to finding constant scalar curvature K\"ahler (cscK) metrics on…

Differential Geometry · Mathematics 2017-08-04 Ved V. Datar

We survey the various constructions of forward self-similar solutions (and generalizations of self-similar solutions) to the Navier-Stokes equations. We also include and prove an extension of a recent result from [7].

Analysis of PDEs · Mathematics 2018-02-02 Zachary Bradshaw , Tai-Peng Tsai

We address the problem of classification of integrable differential-difference equations in 2+1 dimensions with one/two discrete variables. Our approach is based on the method of hydrodynamic reductions and its generalisation to dispersive…

Exactly Solvable and Integrable Systems · Physics 2015-06-15 E. V. Ferapontov , V. S. Novikov , I. Roustemoglou

For convex univalent functions we give instances where the sharp bound for various coefficient functionals are identical to those for the corresponding bound for the inverse function. We give instances where the sharp bounds differ and also…

Complex Variables · Mathematics 2022-12-12 Derek K. Thomas

For small-amplitude semilinear wave equations with power type nonlinearity on the first-order spatial derivative, the expected sharp upper bound on the lifespan of solutions is obtained for both critical cases and subcritical cases, for all…

Analysis of PDEs · Mathematics 2024-06-05 Kerun Shao , Hiroyuki Takamura , Chengbo Wang

We establish a curvature estimate for classical minimal surfaces with total boundary curvature less than 4\pi. The main application is a bound on the genus of these surfaces depending solely on the geometry of the boundary curve. We also…

Differential Geometry · Mathematics 2007-12-11 Giuseppe Tinaglia

Scalar curvature constraints can be studied by means of splitting procedures. The success of this strategy depends on the control we can get on its splitting factors. We introduce canonical so-called minimal splitting factors. They have…

Differential Geometry · Mathematics 2022-03-30 Joachim Lohkamp

We establish $L^p\times L^q$ to $L^r$ estimates for some paraproducts, which arise in the study of the bilinear Hilbert transform along curves.

Classical Analysis and ODEs · Mathematics 2008-07-10 Xiaochun Li

We estimate the mean square of a short exponential sum involving Fourier coefficients of a cusp form with a linear twist, a smooth weight function, and a relatively short averaging interval.

Number Theory · Mathematics 2014-07-15 Anne-Maria Ernvall-Hytönen

We investigate orbit spaces of isometric actions on unit spheres and find a universal upper bound for the infimum of their curvatures.

Differential Geometry · Mathematics 2016-02-15 Claudio Gorodski , Alexander Lytchak

In this paper, we investigate interior gradient estimates for solutions to the mean curvature equation $$ \dive \left( \frac{\nabla u}{\sqrt{1 + |\nabla u|^2}} \right) = f(\nabla u)$$ under various nonlinear assumptions on the right-hand…

Analysis of PDEs · Mathematics 2026-02-13 Fanheng Xu