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Homoclinic tangencies and singular hyperbolicity are involved in the Palis conjecture for vector fields. Typical three dimensional vector fields are well understood by recent works. We study the dynamics of higher dimensional vector fields…

Dynamical Systems · Mathematics 2020-02-03 Xiao Wen , Dawei Yang

The lack of a uniformization theorem in several complex variables leads to a desire to classify all of the simply connected domains. We use established computational methods and a localization technique to generalize a recently-published…

Complex Variables · Mathematics 2026-01-07 Nicholas Newsome

In this paper, we prove the Shafarevich conjecture for proper hyperbolic polycurves, which is a higher dimensional analogue of that for proper hyperbolic curves. First, we study theories of proper hyperbolic polycurves over regular schemes.…

Number Theory · Mathematics 2019-11-05 Ippei Nagamachi , Teppei Takamatsu

We show that a relatively hyperbolic graph with uniformly hyperbolic peripheral subgraphs is hyperbolic. As an application, we show that the disc graph and the electrified disc graph of a handlebody H of genus g>1 are hyperbolic, and we…

Geometric Topology · Mathematics 2014-05-20 Ursula Hamenstaedt

We construct an elementary counterexample to the criterion for Kobayashi hyperbolicity for a class of tube domains in ${\mathbb C}^2$ proposed by J.-J. Loeb.

Complex Variables · Mathematics 2015-09-02 Alexander Isaev

In this note, we will explain the connection between the Seven Circles Theorem and hyperbolic geometry, then prove a stronger result about hyperbolic geometry hexagons which implies the Seven Circles Theorem as a special case.

Metric Geometry · Mathematics 2019-11-04 Kostiantyn Drach , Richard Evan Schwartz

We determine all connected homogeneous Kobayashi-hyperbolic manifolds of dimension $n\ge 2$ whose holomorphic automorphism group has dimension $n^2-3$. This result complements existing classifications for automorphism group dimension…

Complex Variables · Mathematics 2017-09-22 Alexander Isaev

In this article we study the injective Kobayashi metric on complex surfaces.

Complex Variables · Mathematics 2020-10-07 John Erik Fornaess , Maria Trybula , Erlend Fornaess Wold

In this paper, we generalize the Kobayashi pseudo-distance to complex manifolds which admit holomorphic bracket generating distributions. The generalization is based on Chow's theorem in sub-Riemannian geometry. Let G be a linear semisimple…

Complex Variables · Mathematics 2018-04-11 Aeryeong Seo

We prove that a smooth, complex plane curve $C$ of odd degree can be defined by a polynomial with real coefficients if and only if $C$ is isomorphic to its complex conjugate. Counterexamples are known for curves of even degree. More…

Algebraic Geometry · Mathematics 2023-09-22 Giulio Bresciani

The result of Siegel that the Tamagawa number of $SL_r$ over a function field is 1 has an expression purely in terms of vector bundles on a curve, which is known as the Siegel formula. We prove an analogous formula for vector bundles with…

alg-geom · Mathematics 2008-02-03 Nitin Nitsure

We show that the moduli space M of marked cubic surfaces is biholomorphic to the quotient by a discrete group generated by complex reflections of the complex four-ball minus the reflection hyperplanes of the group. Thus M carries a complex…

alg-geom · Mathematics 2009-10-30 Daniel Allcock , James A. Carlson , Domingo Toledo

The Complex of Curves on a Surface is a simplicial complex whose vertices are homotopy classes of simple closed curves, and whose simplices are sets of homotopy classes which can be realized disjointly. It is not hard to see that the…

Geometric Topology · Mathematics 2009-10-31 Howard A. Masur , Yair N. Minsky

In this paper we count the number of isomorphism classes of geometrically indecomposable quasi-parabolic structures of a given type on a given vector bundle on the projective line over a finite field. We give a conjectural cohomological…

Algebraic Geometry · Mathematics 2016-09-19 Emmanuel Letellier

The systole of a hyperbolic surface is bounded by a logarithmic function of its genus. This bound is sharp, in that there exist sequences of surfaces with genera tending to infinity that attain logarithmically large systoles. These are…

Geometric Topology · Mathematics 2015-12-22 Bram Petri , Alexander Walker

This is a full study of the dynamics of polynomial planar vector fields whose linear part is a multiple of the identity and whose nonlinear part is a homogeneous polynomial of arbitrary degree $n>1$. It extends previous work by other…

Dynamical Systems · Mathematics 2026-02-10 Begoña Alarcón , Sofia B. S. D. Castro , Isabel S. Labouriau

We define the Kobayashi quotient of a complex variety by identifying points with vanishing Kobayashi pseudodistance between them and show that if a compact complex manifold has an automorphism whose order is infinite, then the fibers of…

Differential Geometry · Mathematics 2017-04-12 Fedor Bogomolov , Ljudmila Kamenova , Steven Lu , Misha Verbitsky

Consider the smooth projective models C of curves y^2=f(x) with f(x) in Z[x] monic and separable of degree 2g+1. We prove that for g >= 3, a positive fraction of these have only one rational point, the point at infinity. We prove a lower…

Number Theory · Mathematics 2016-08-03 Bjorn Poonen , Michael Stoll

We introduce the notion of hyperbolic equivalence for quadric bundles and quadratic forms on vector bundles and show that hyperbolic equivalent quadric bundles share many important properties: they have the same Brauer data; moreover, if…

Algebraic Geometry · Mathematics 2024-05-22 Alexander Kuznetsov

We give a combinatorial proof, using the hyperbolicity of the curve graphs, of the bounded geodesic image theorem of Masur and Minsky. Recently it has been shown that curve graphs are uniformly hyperbolic, thus a universal bound can be…

Geometric Topology · Mathematics 2013-01-29 Richard C. H. Webb