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20032026
most citedEuler and Chebyshev: From the sphere to the plane and backwards

12 citations

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24 papers · 1 filter

math.GT2026

The combinatorial structure of the unit tangent spheres and cotangent spheres of Teichm{ü}ller space with Thurston's Finsler metric

Ken'Ichi Ohshika, Athanase Papadopoulos

We prove several new results on the combinatorial structures of the unit spheres of the norms induced by Thurston's metric on the tangent and cotangent spaces of the Teichm{ü}ller…

math.GT2026

Integrals of general geometric random variables on the moduli space of hyperbolic surfaces

Victor Le Guilloux

In this article we provide an integration formula enabling us to integrate random variables defined on the moduli space of hyperbolic surfaces which involve the lengths of closed g…

math.GT2026

Notes on angles and solid angles, in relation with Euler's memoir De mensura angulorum solidorum

Stelios Negrepontis, Athanase Papadopoulos

We provide some historical context to the study of solid angles carried out by Euler in his memoir \emph{De mensura angulorum solidorum} (On the measure of solid angles). We extend…

math.GT2025

Convex structures of the unit tangent spheres in Teichm{ü}ller space

Assaf Bar-Natan, Ken'Ichi Ohshika, Athanase Papadopoulos

We analyse the convex structure of the Finsler infinitesimal balls of the Thurston metric on Teichm{ü}ller space. We analyse the convex structure of the Finsler unit ball in the ta…

math.GT2024

The earthquake metric on Teichm{ü}ller space

Yi Huang, Ken'ichi Ohshika, Huiping Pan +1

This is the first paper to systematically study the earthquake metric, an asymmetric Finsler metric on Teichm{ü}ller space introduced by Thurston. We provide proofs for several ass…

math.GT2021★ 1 cited

The infinitesimal and global Thurston geometry of Teichm{ü}ller space

Yi Huang, Ken'Ichi Ohshika, Athanase Papadopoulos

We undertake a systematic study of the infinitesimal geometry of the Thurston metric, showing that the topology, convex geometry and metric geometry of the tangent and cotangent sp…

math.GT2021

Minimal stretch maps between Euclidean triangle?

Ismail Saglam, Athanase Papadopoulos

Given two triangles whose angles are all acute, we find a homeomorphism with the smallest Lipschitz constant between them and we give a formula for the Lipschitz constant of this m…

math.GT2021

Ideal triangles, hyperbolic surfaces and the Thurston metric on Teichm{ü}ller space

Athanase Papadopoulos

These are notes on the hyperbolic geometry of surfaces, Teichm{ü}ller spaces and Thurston's metric on these spaces. They are associated with lectures I gave at the Morningside Cent…

math.GT2019

W. P. Thurston and French mathematics

François Laudenbach, Athanase Papadopoulos

We give a general overview of the influence of William Thurston on the French mathematical school and we show how some of the major problems he solved are rooted in the French math…

math.GT2018

Bijections of geodesic lamination space preserving left Hausdorff convergence

Ken'Ichi Ohshika, Athanase Papadopoulos

We introduce an asymmetric distance function, which we call the `left Hausdorff distance function', on the space of geodesic laminations on a closed hyperbolic surface of genus at…

math.GT2018

Homeomorphisms and intersection number

Ken'Ichi Ohshika, Athanase Papadopoulos

We prove two rigidity results for automorphism groups of the spaces ML(S) of measured laminations on a closed hyperbolic surface S and PML(S) of projective measured laminations on…

math.GT2014

Transitional geometry

Athanase Papadopoulos, Norbert A'Campo

We develop a transitional geometry, that is, a family of geometries of constant curvatures which makes a continuous connec-tion between the hyperbolic, Euclidean and spherical geom…

math.GT2014

Actions of mapping class groups

Athanase Papadopoulos

This paper has three parts. The first part is a general introduction to rigidity and to rigid actions of mapping class group actions on various spaces. In the second part, we descr…

math.GT2014

Convex real projective structures and Hilbert metrics

Inkang Kim, Athanase Papadopoulos

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…

math.GT2012★ 1 cited

Thurston's metric on Teichmüller space and isomorphisms between Fuchsian groups

Athanase Papadopoulos, Weixu Su

The aim of this paper is to relate Thurston's metric on Teichmüller space to several ideas initiated by T. Sorvali on isomorphisms between Fuchsian groups. In particular, this will…

math.GT2012★ 2 cited

The Funk and Hilbert geometries for spaces of constant curvature

Athanase Papadopoulos, Sumio Yamada

The goal of this paper is to introduce and study analogues of the Euclidean Funk and Hilbert metrics on open convex subsets of hyperbolic or spherical spaces. At least at a for…

math.GT2011

On the coarse geometry of the complex of domains

Valentina Disarlo

The complex of domains is a geometric tool with a very rich simplicial structure, it contains the curve complex as a simplicial subcomplex. In this paper we shall reg…

math.GT2009

On the ideal triangulation graph of a punctured surface

Mustafa Korkmaz, Athanase Papadopoulos

We study the ideal triangulation graph of a punctured surface of finite type. We show that if is not the sphere with at most three punctures or the torus with one pu…

math.GT2009

Shortening all the simple closed geodesics on surfaces with boundary

Athanase Papadopoulos, Guillaume Théret

We give a proof of an unpublished result of Thurston showing that given any hyperbolic metric on a surface of finite type with nonempty boundary, there exists another hyperbolic me…

math.GT2009

Length spectra and the Teichmueller metric for surfaces with boundary

Lixin Liu, Athanase Papadopoulos, Weixu Su +1

We consider some metrics and weak metrics defined on the Teichmueller space of a surface of finite type with nonempty boundary, that are defined using the hyperbolic length spectru…

math.GT2009★ 8 cited

On length spectrum metrics and weak metrics on Teichmueller spaces of surfaces with boundary

Lixin Liu, Athanase Papadopoulos, Weixu Su +1

We define and study metrics and weak metrics on the Teichmueller space of a surface of topologically finite type with boundary. These metrics and weak metrics are associated to the…

math.GT2008★ 1 cited

Some metrics on Teichmüller spaces of surfaces of infinite type

Lixin Liu, Athanase Papadopoulos

Unlike the case of surfaces of topologically finite type, there are several different Teichmüller spaces that are associated to a surface of topological infinite type. These Teichm…

math.GT2007

A rigidity theorem for the mapping class group action on the space of unmeasured foliations on a surface

Athanase Papadopoulos

Let be a surface of finite type which is not a sphere with at most four punctures, a torus with at most two punctures, or a closed surface of genus two. Let be t…

math.GT2007★ 12 cited

Well displacing representations and orbit maps

Thomas Delzant, Olivier Guichard, François Labourie +1

We discuss in this article a property of action of groups by isometries called "well displacing". An action is said to be well displacing, if the displacement function is equivalen…