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We investigate the thermodynamic curvature resulting from a Riemannian geometry approach to thermodynamics for the Pauli paramagnetic gas which is a system of identical fermions each with spin 1/2. We observe that the absolute value of…

统计力学 · 物理学 2007-05-23 Kamran Kaviani , Ali Dalafi Rezaie

An Abelian differential gives rise to a flat structure (translation surface) on the underlying Riemann surface. In some directions the directional flow on the flat surface may contain a periodic region that is made up of maximal cylinders…

几何拓扑 · 数学 2014-09-30 Max Bauer , Elise Goujard

In a previous work, we studied isoparametric functions on Riemannian manifolds, especially on exotic spheres. One result there says that, in the family of isoparametric hypersurfaces of a closed Riemannian manifold, there exist at least one…

微分几何 · 数学 2012-10-10 Jianquan Ge , Zizhou Tang

In this paper, we construct holomorphic families of Riemann surfaces from Veech groups and characterize their sections by some points of corresponding flat surfaces. The construction gives us concrete solutions for some Diophantine…

复变函数 · 数学 2012-04-11 Yoshihiko Shinomiya

We extend the results of Riemannian geometry over finite groups and provide a full classification of all linear connections for the minimal noncommutative differential calculus over a finite cyclic group. We solve the torsion-free and…

数学物理 · 物理学 2020-12-24 Arkadiusz Bochniak , Andrzej Sitarz , Paweł Zalecki

Over the past two decades the theory of the Weil-Petersson metric has been extended to general Teichm\"uller spaces of infinite type, including for example the universal Teichm\"uller space. In this paper we give a survey of the main…

复变函数 · 数学 2023-02-14 Eric Schippers , Wolfgang Staubach

We investigate the characteristic numbers of Del Pezzo surfaces using degenerations.

代数几何 · 数学 2007-05-23 Izzet Coskun

A conformal metric $g$ with constant curvature one and finite conical singularities on a compact Riemann surface $\Sigma$ can be thought of as the pullback of the standard metric on the 2-sphere by a multi-valued locally univalent…

微分几何 · 数学 2016-01-20 Qing Chen , Wei Wang , Yingyi Wu , Bin Xu

We show that the index of a constant mean curvature 1 surface in hyperbolic 3-space is completely determined by the compact Riemann surface and secondary Gauss map that represent it in Bryant's Weierstrass representation. We give three…

微分几何 · 数学 2008-07-01 Levi Lopes de Lima , Wayne Rossman

Motivated by the rich geometry of conformal Riemannian manifolds and by the recent development of geometries modeled on homogeneous spaces $G/P$ with $G$ semisimple and $P$ parabolic, Weyl structures and preferred connections are introduced…

微分几何 · 数学 2007-05-23 Andreas Cap , Jan Slovak

We prove curvature estimates for general curvature functions. As an application we show the existence of closed, strictly convex hypersurfaces with prescribed curvature $F$, where the defining cone of $F$ is $\C_+$. $F$ is only assumed to…

微分几何 · 数学 2009-10-19 Claus Gerhardt

We discuss conformal metrics of curvature 1 on tori and on the sphere, with four conic singularities whose angles are multiples of pi/2. Besides some general results we study in detail the family of such symmetric metrics on the sphere,…

复变函数 · 数学 2018-01-23 Alexandre Eremenko , Andrei Gabrielov

We determine all helical surfaces in three-dimensional Euclidean space which possess a constant ratio $a:=\kappa_1/\kappa_2$ of principal curvatures (CRPC surfaces), thus providing the first explicit CRPC surfaces beyond the known…

微分几何 · 数学 2022-04-14 Yang Liu , Olimjoni Pirahmad , Hui Wang , Dominik L. Michels , Helmut Pottmann

We consider flat families of reduced curves on a smooth surface S such that each member C has the same number of singularities of fixed singularity types and the corresponding (locally closed) subscheme H of the Hilbert scheme of S. We are…

alg-geom · 数学 2008-02-03 Gert-Martin Greuel , Christoph Lossen

In this paper we study the asymptotic behavior of Weil-Petersson volumes of moduli spaces of hyperbolic surfaces of genus $g$ as $g \rightarrow \infty.$ We apply these asymptotic estimates to study the geometric properties of random…

一般拓扑 · 数学 2010-12-13 Maryam Mirzakhani

A Riemannian geometry of noncommutative n-dimensional surfaces is developed as a first step towards the construction of a consistent noncommutative gravitational theory. Historically, as well, Riemannian geometry was recognized to be the…

高能物理 - 理论 · 物理学 2008-11-26 M. Chaichian , A. Tureanu , R. B. Zhang , X. Zhang

We review some basic concepts related to convex real projective structures from the differential geometry point of view. We start by recalling a Riemannian metric which originates in the study of affine spheres using the Blaschke connection…

几何拓扑 · 数学 2014-06-30 Inkang Kim , Athanase Papadopoulos

Cone spherical metrics are conformal metrics with constant curvature one and finitely many conical singularities on compact Riemann surfaces. By using Strebel differentials as a bridge, we construct a new class of cone spherical metrics on…

复变函数 · 数学 2020-06-25 Jijian Song , Yiran Cheng , Bo Li , Bin Xu

In this paper we review some author's results about Weingarten surfaces in Euclidean space $\r^3$ and hyperbolic space $\h^3$. We stress here in the search of examples of linear Weingarten surfaces that satisfy a certain geometric property.…

微分几何 · 数学 2009-06-19 Rafael López

We consider stable minimal surfaces of genus 1 in Euclidean space and in Riemannian manifolds. Under the condition of covering stability (all finite covers are stable) we show that a genus 1 finite total curvature minimal surface in…

微分几何 · 数学 2023-03-15 Ailana Fraser , Richard Schoen