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For $n \ge 2$, we prove that a finite volume complex hyperbolic $n$-manifold containing infinitely many maximal properly immersed totally geodesic submanifolds of dimension at least two is arithmetic, paralleling our previous work for real…

Dynamical Systems · Mathematics 2023-02-23 Uri Bader , David Fisher , Nicholas Miller , Matthew Stover

Gromov Hyperbolic groups have remarkable finiteness properties;for example those that are torsion-free are fundamental groups of finitecomplexes whose universal cover iscontractible (property~$F$). In this talk we will show thattheir…

Group Theory · Mathematics 2025-03-07 Olivier Guichard

We construct symplectic blenders for two classical Hamiltonian systems: the 3-body problem and its restricted version. We use these objects to show that both models exhibit a robust, strong form of topological instability. We do not assume…

Dynamical Systems · Mathematics 2026-03-25 Marcel Guardia , Jaime Paradela

The work of J{\o}rgensen and Thurston shows that there is a finite number N(v) of orientable hyperbolic 3-manifolds with any given volume v. In this paper, we construct examples showing that the number of hyperbolic knot complements with a…

Geometric Topology · Mathematics 2015-06-02 Christian Millichap

We characterize the class of Gromov hyperbolic spaces, whose boundary at infinity allow canonical M\"obius structures.

Metric Geometry · Mathematics 2012-10-19 Renlong Miao , Viktor Schroeder

In hyperbolic space density cannot be defined by a limit as we define it in Euclidean space. We describe the local density bounds for sphere packings and we discuss the different attempts to define optimal arrangements in hyperbolic space.

Metric Geometry · Mathematics 2022-02-23 Gábor Fejes Tóth , Lázló Fejes Tóth , Włodzimierz. Kuperberg

In this paper we give an upper bound of the first eigenvalue of the Laplace operator on a complete stable minimal hypersurface $M$ in the hyperbolic space which has finite $L^2$-norm of the second fundamental form on $M$. We provide some…

Differential Geometry · Mathematics 2010-02-23 Keomkyo Seo

This article is part of the program of studying large-scale geometric properties of totally disconnected locally compact groups, TDLC-groups, by analogy with the theory for discrete groups. We provide a characterization of hyperbolic…

Group Theory · Mathematics 2021-04-30 Shivam Arora , Ilaria Castellano , Ged Corob Cook , Eduardo Martínez-Pedroza

Given a metric (graph) bundle $X$ over $B$ where all the fibres are strongly relatively hyperbolic and nonelementary we show that, under certain conditions, $X$ is strongly hyperbolic relative to a collection of maximal cone-subbundles of…

Group Theory · Mathematics 2022-04-05 Swathi Krishna

The existence of a smooth complete strictly locally convex hypersurface with prescribed scalar curvature and asymptotic boundary at infinity in $\mathbb{H}^{3}$ is proved under the assumption that there exists a strictly locally convex…

Differential Geometry · Mathematics 2020-12-08 Zhenan Sui

In this paper, we study diagonal hyperbolic systems in one space dimension. Based on a new gradient entropy estimate, we prove the global existence of a continuous solution, for large and non-decreasing initial data. We remark that these…

Mathematical Physics · Physics 2009-04-14 Ahmad El Hajj , Régis Monneau

In this paper we create many examples of hyperbolic groups with subgroups satisfying interesting finiteness properties. We give the first examples of subgroups of hyperbolic groups which are of type $FP_2$ but not finitely presented. We…

Group Theory · Mathematics 2021-01-08 Robert Kropholler , Federico Vigolo

For any finite collection $f_i$ of fully irreducible automorphisms of the free group $F_n$ we construct a connected $\delta$-hyperbolic $Out(F_n)$-complex in which each $f_i$ has positive translation length.

Group Theory · Mathematics 2009-11-09 Mladen Bestvina , Mark Feighn

We study the asymptotic behavior of the homotopy groups of simply connected finite $p$-local complexes, and define a space to be locally hyperbolic if its homotopy groups have exponential growth. Under some certain conditions related to the…

Algebraic Topology · Mathematics 2019-08-29 Ruizhi Huang , Jie Wu

We show that large classes of non-arithmetic hyperbolic $n$-manifolds, including the hybrids introduced by Gromov and Piatetski-Shapiro and many of their generalizations, have only finitely many finite-volume immersed totally geodesic…

Geometric Topology · Mathematics 2024-12-02 David Fisher , Jean-François Lafont , Nicholas Miller , Matthew Stover

Markov partitions persisting in a neighbourhood of hyperbolic components of rational maps were constructed under the condition that closures of Fatou components are disjoint in \cite{R1}. Given such a partition, we characterize all nearby…

Dynamical Systems · Mathematics 2017-11-01 Mary Rees

We give new proofs that the Mandelbrot set is locally connected at every Misiurewicz point and at every point on the boundary of a hyperbolic component. The idea is to show ``shrinking of puzzle pieces'' without using specific puzzles.…

Dynamical Systems · Mathematics 2007-08-21 Dierk Schleicher

This paper studies set-invariance and stabilization of hyperbolic sets over rate-limited channels for discrete-time control systems. We first investigate structural and control-theoretic properties of hyperbolic sets, in particular such…

Optimization and Control · Mathematics 2021-05-20 Christoph Kawan

We consider hyperbolic 3-manifolds with either non-empty compact geodesic boundary, or some toric cusps, or both. For any such M we analyze what portion of the volume of M can be recovered by inserting in M boundary collars and cusp…

Geometric Topology · Mathematics 2012-06-08 Carlo Petronio , Michele Tocchet

In this paper we continue the study of non-diagonalisable hyperbolic systems with variable multiplicity started by the authors in \cite{Garetto2018}. In the case of space dependent coefficients, we prove a representation formula for…

Analysis of PDEs · Mathematics 2020-01-15 Claudia Garetto , Christian Jäh , Michael Ruzhansky