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We give a slope equality for fibered surfaces whose general fiber is a smooth plane curve. As a corollary, we prove a "strong" Durfee-type inequality for isolated hypersurface surface singularities, which implies Durfee's strong conjecture…

Algebraic Geometry · Mathematics 2018-04-18 Makoto Enokizono

We prove estimates for the sectional curvature of hyperkaehler quotients and give applications to moduli spaces of solutions to Nahm's equations and Hitchin's equations.

Differential Geometry · Mathematics 2007-05-23 Roger Bielawski

In this very short note we prove a lower bound for the scalar curvature of certain steady gradient Ricci solitons.

Differential Geometry · Mathematics 2011-02-23 Bennett Chow , Peng Lu , Bo Yang

This paper completes a programme to determine which toric surfaces admit Kahler metrics of constant scalar curvature/

Differential Geometry · Mathematics 2008-05-02 S. K. Donaldson

We discuss some estimates of subelliptic type related with vector fields satisfying the H\"ormander condition. Our approach makes use of a class of approximate exponentials maps. Such kind of estimates arises naturally in the study of…

Analysis of PDEs · Mathematics 2019-12-10 Annamaria Montanari , Daniele Morbidelli

In this paper, the author discusses the elliptic type gradient estimate for the solution of the time-dependent Schr\"{o}dinger equations on noncompact manifolds. As its application, the dimension-free Harnack inequality and the Liouville…

Differential Geometry · Mathematics 2007-05-30 Qihua Ruan

We prove a gradient estimate for a class of capillary curvature equations in the half-space. As an application, we prove the existence of an even, smooth, strictly convex solution to the even capillary $L_p$-curvature problem for all…

Analysis of PDEs · Mathematics 2026-02-26 Yingxiang Hu , Mohammad N. Ivaki

We give an efficient algorithm to compute equations of twists of hyperelliptic curves of arbitrary genus over any separable field (of characteristic different from 2), and we explicitly describe some interesting examples.

Number Theory · Mathematics 2018-09-27 Davide Lombardo , Elisa Lorenzo García

The curvature estimates of $k$ curvature equations for general right hand side is a longstanding problem. In this paper, we totally solve the $n-1$ case and we also discuss some applications for our estimate.

Analysis of PDEs · Mathematics 2020-02-21 Changyu Ren , Zhizhang Wang

We introduce the notion of curvature parameters for singular plane curves with finite multiplicities and define the notion of curvatures for them. We then provide criteria to determine their singularity types for A-simple singularities. As…

Differential Geometry · Mathematics 2025-12-30 Toshizumi Fukui , Saiki Hoshino

We establish interior $C^2$ estimates for convex solutions of scalar curvature equation and $\sigma_2$-Hessian equation. We also prove interior curvature estimate for isometrically immersed hypersurfaces $(M^n,g)\subset \mathbb R^{n+1}$…

Differential Geometry · Mathematics 2019-07-17 Pengfei Guan , Guohuan Qiu

In this paper, we establish new normal scalar curvature inequalities on a class of austere submanifolds by proving sharper DDVV-type inequalities on associated austere subspaces. We also provide some examples of austere submanifolds in this…

Differential Geometry · Mathematics 2026-01-06 Jianquan Ge , Ya Tao , Yi Zhou

We derive curvature estimates for minimal submanifolds in Euclidean space for arbitrary dimension and codimension via Gauss map. Thus, Schoen-Simon-Yau's results and Ecker-Huisken's results are generalized to higher codimension. In this way…

Differential Geometry · Mathematics 2007-09-25 Y. L. Xin , Ling Yang

We give a lower bound for the Gaussian curvature of convex level sets of minimal graphs and the solutions to semilinear elliptic equations with the norm of boundary gradient and the Gaussian curvature of the boundary.

Analysis of PDEs · Mathematics 2010-03-11 Pei-He Wang , Wei Zhang

We obtain sharp estimates involving the mean curvatures of higher order of a complete bounded hypersurface immersed in a complete Riemannian manifold. Similar results are also given for complete spacelike hypersurfaces in Lorentzian ambient…

Differential Geometry · Mathematics 2013-01-17 L. J. Alias , M. Dajczer , M. Rigoli

We study Gauss curvature for random Riemannian metrics on a compact surface, lying in a fixed conformal class; our questions are motivated by comparison geometry. Next, analogous questions are considered for the scalar curvature in…

Differential Geometry · Mathematics 2011-01-04 Yaiza Canzani , Dmitry Jakobson , Igor Wigman

We prove optimal pointwise Schauder estimates in the spatial variables for solutions of linear parabolic integro-differential equations. Optimal H\"older estimates in space-time for those spatial derivatives are also obtained.

Analysis of PDEs · Mathematics 2015-06-05 Tianling Jin , Jingang Xiong

We obtain upper bounds on the number of finite sets $\mathcal S$ of primes below a given bound for which various $2$ variable $\mathcal S$-unit equations have a solution.

Number Theory · Mathematics 2020-07-31 I. E. Shparlinski , C. L. Stewart

We prove a uniform Fourier extension-restriction estimate for a certain class of curves in d-dimensional Euclidean space.

Classical Analysis and ODEs · Mathematics 2008-11-11 Daniel M. Oberlin

In the present paper, the coefficient estimates are found for the class $\mathcal S^{*-1}(\alpha)$ consisting of inverses of functions in the class of univalent starlike functions of order $\alpha$ in $\mathcal D=\{z\in\mathbb C:|z|<1\}$.…

Complex Variables · Mathematics 2007-05-23 G. P. Kapoor , A. K. Mishra