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In this article, we prove a class of normal dilation matrices affirming the Marcus-de Oliveira conjecture.

Rings and Algebras · Mathematics 2020-06-29 Kijti Rodtes

This is the first of two papers, in which we prove some properties of the Webster scalar curvature flow. More precisely, we establish the long-time existence, L^p convergence and the blow-up analysis for the solution of the flow. As a…

Differential Geometry · Mathematics 2014-11-14 Pak Tung Ho

We show that ruled real hypersurfaces with constant mean curvature in the complex projective and hyperbolic spaces must be minimal. This provides their classification, by virtue of a result of Lohnherr and Reckziegel.

Differential Geometry · Mathematics 2019-07-24 Miguel Dominguez-Vazquez , Olga Perez-Barral

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 algebraically compute all possible sectional curvature values for canonical algebraic curvature tensors, and use this result to give a method for constructing general sectional curvature bounds. We use a well-known method to…

Differential Geometry · Mathematics 2020-07-15 Maxine Calle , Corey Dunn

This note contains a new combinatorial proof of Cramer's rule based on the Gessel-Viennot-Lindstrom Lemma.

Combinatorics · Mathematics 2025-09-08 Sudip Bera

The purpose of this paper is to prove the a priori estimates for constant scalar curvature Kaehler metrics with conic singularities along normal crossing divisors. The zero order estimates are proved by a reformulated version of…

Differential Geometry · Mathematics 2023-01-24 Long Li , Jian Wang , Kai Zheng

In this paper, we give a new generalization of positive sectional curvature called positive weighted sectional curvature. It depends on a choice of Riemannian metric and a smooth vector field. We give several simple examples of Riemannian…

Differential Geometry · Mathematics 2014-10-08 Lee Kennard , William Wylie

We prove that codimension two surfaces satisfying a nonlinear curvature condition depending on normal curvature are smoothly deformed by mean curvature flow to round points.

Differential Geometry · Mathematics 2016-05-23 Charles Baker , Huy The Nguyen

In this article, we give proofs on the Arnold Lagrangian intersection conjecture on the cotangent bundles, Arnold-Givental Lagrangian intersection conjecture and the Arnold fixed point conjecture.

Symplectic Geometry · Mathematics 2013-07-08 Renyi Ma

We provide a short proof of the 1-dimensional flat chain conjecture.

Metric Geometry · Mathematics 2026-04-01 Philippe Bouafia , Thierry De Pauw

In this paper, we will give an extension of Mok's theorem on the generalized Frankel conjecture under the condition of the orthogonal bisectional curvature.

Differential Geometry · Mathematics 2007-10-02 Hui-Ling Gu , Zhu-Hong Zhang

We present a direct proof of the second conjecture made by M. Atiyah and P. Sutcliffe for the case of convex quadrilaterals. Unlike previous work on this conjecture, our proof does not require any computer aided computations. The new proof…

Metric Geometry · Mathematics 2022-02-03 Mazen Bou Khuzam

This is a continuation of our first paper in [WY16]. There are two purposes of this paper: One is to give a proof of the main result in [WY16] without going through the argument depending on numerical effectiveness. The other one is to…

Differential Geometry · Mathematics 2016-09-07 Damin Wu , Shing-Tung Yau

We define a filtration of a standard Whittaker module over a complex semisimple Lie algebra and and establish its fundamental properties. Our filtration specialises to the Jantzen filtration of a Verma module for a certain choice of…

Representation Theory · Mathematics 2024-07-24 Jens Niklas Eberhardt , Anna Romanov

Following ideas of Gromov we prove scalar and mean curvature comparison results for Riemannian bands with lower scalar curvature bounds in dimension $n\leq7$. The model spaces we use are warped products over scalar-flat manifolds with…

Differential Geometry · Mathematics 2022-05-24 Daniel Räde

This note presents an elementary and direct proof for the convexity of the Choquet integral when the corresponding set function is submodular.

Functional Analysis · Mathematics 2015-01-08 Aurélien Alfonsi

In this paper, we investigate manifolds for which the curvature of the second kind (following the terminology of Nishikawa) satisfies certain positivity conditions. Our main result settles Nishikawa's conjecture that manifolds for which the…

Differential Geometry · Mathematics 2026-01-23 Matthew Gursky , Xiaodong Cao , Hung Tran

In this note we prove a converse of Bohr's equivalence theorem for Dirichlet series under some natural assumptions.

Number Theory · Mathematics 2016-12-01 Mattia Righetti

We complete the study of points of bounded height on irreducible non-normal cubic surfaces by doing the point count on the cubic surface $W$ given by $t_0^2 t_2 = t_1^2 t_3$ over any number field. We show that the order of growth agrees…

Number Theory · Mathematics 2020-12-01 Nils Gubela , Julian Lyczak