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We prove that there are infinitely many non-homeomorphic hyperbolic knot complements $S^3\setminus K_i = \mathbb{H}^3/\Gamma_i$ for which $\Gamma_i$ contains elements whose trace is an algebraic non-integer.

Geometric Topology · Mathematics 2020-09-29 Alan W. Reid , Nicholas Rouse

We show that any closed hyperbolic 3-manifold M admits a Riemannian metric with scalar curvature at least -6, but with volume entropy strictly larger than 2. In particular, this construction gives counterexamples to a conjecture of I. Agol,…

Differential Geometry · Mathematics 2025-06-06 Demetre Kazaras , Antoine Song , Kai Xu

The density conjecture of Bers, Sullivan and Thurston predicts that each complete hyperbolic 3-manifold M with finitely generated fundamental group is an algebraic limit of geometrically finite hyperbolic 3-manifolds. We prove that the…

Geometric Topology · Mathematics 2007-05-23 Jeffrey F. Brock , Kenneth W. Bromberg

For any hyperbolic 3-manifold $M$ with totally geodesic boundary, there are finitely many boundary slopes for essential immersed surfaces of a given genus. There is a uniform bound for the number of such boundary slopes if the genus of…

Geometric Topology · Mathematics 2007-05-23 Joel Hass , Shicheng Wang , Qing Zhou

In this note, we show that there exist cusped hyperbolic $3$-manifolds that embed geodesically, but cannot bound geometrically. Thus, being a geometric boundary is a non-trivial property for such manifolds. Our result complements the work…

Geometric Topology · Mathematics 2020-03-19 Alexander Kolpakov , Alan W. Reid , Stefano Riolo

A random group contains many subgroups which are isomorphic to the fundamental group of a compact hyperbolic 3-manifold with totally geodesic boundary. These subgroups can be taken to be quasi-isometrically embedded. This is true both in…

Group Theory · Mathematics 2017-02-23 Danny Calegari , Henry Wilton

We consider hyperbolic manifolds with boundary, which admit an ideal triangulation with n ideal triangles and one edge. We prove that the number of these manifolds is $\exp(n\ln(n)+O(n))$.

Combinatorics · Mathematics 2015-06-30 A. Magazinov , I. Shnurnikov

Given the fundamental group $\Gamma$ of a finite-volume complete hyperbolic $3$-manifold $M$, it is possible to associate to any representation $\rho:\Gamma \rightarrow \text{Isom}(\mathbb{H}^3)$ a numerical invariant called volume. This…

Geometric Topology · Mathematics 2021-09-06 Stefano Francaviglia , Alessio Savini

We prove that for any closed, connected, oriented 3-manifold M, there exists an infinite family of 2-fold branched covers of M that are hyperbolic 3-manifolds and surface bundles over the circle with arbitrarily large volume.

Geometric Topology · Mathematics 2023-01-26 Susumu Hirose , Efstratia Kalfagianni , Eiko Kin

We give results on the following questions about a topologically tame hyperbolic 3-manifold M : 1. Does M have nonzero square-integrable harmonic 1-forms? 2. Does zero lie in the spectrum of the Laplacian acting on (1-forms on M)/Ker(d)?

dg-ga · Mathematics 2016-08-31 John Lott

We construct a hyperbolic three-manifold with trivial finite type invariants up to a given degree.

Geometric Topology · Mathematics 2007-05-23 Hitoshi Murakami

We prove that for every closed, connected, orientable, irreducible 3-manifold, there exists an alternating group A_n which is not the topological symmetry group of any graph embedded in the manifold. We also show that for every finite group…

Geometric Topology · Mathematics 2011-08-16 Erica Flapan , Harry Tamvakis

According to Mostow's celebrated rigidity theorem, the geometry of closed hyperbolic 3-manifolds is already determined by their topology. In particular, the volume of such manifolds is a topological invariant and, as such, has been…

Geometric Topology · Mathematics 2022-03-01 Kristóf Huszár

We construct examples of closed non-Haken hyperbolic 3-manifolds with a Heegaard splitting of arbitrarily large distance.

Geometric Topology · Mathematics 2015-06-12 Tao Li

In this paper we provide the first examples of arithmetic hyperbolic 3-manifolds that are rational homology spheres and bound geometrically either compact or cusped hyperbolic 4-manifolds.

Geometric Topology · Mathematics 2022-05-11 Leonardo Ferrari , Alexander Kolpakov , Alan W. Reid

We prove that for every countable group G there exists a hyperbolic 3-manifold M such that the isometry group of M, the mapping class group of M, and the outer automorphism group of the fundamental group of M are isomorphic to G.

Geometric Topology · Mathematics 2007-05-23 Roberto Frigerio , Bruno Martelli

We provide two new proofs of a theorem of Cooper, Long and Reid which asserts that, apart from an explicit finite list of exceptional manifolds, any compact orientable irreducible 3-manifold with non-empty boundary has large fundamental…

Geometric Topology · Mathematics 2007-05-23 Marc Lackenby

See math.CV/0509030 which replaces this paper.

Complex Variables · Mathematics 2007-05-23 A. V. Isaev

Let (M,g) be a complete, simply connected Riemannian manifold of dimension 3 without conjugate points. We show that M is a hyperbolic manifold of constant sectional curvature, provided M is asymptotically harmonic of constant h > 0.

Differential Geometry · Mathematics 2007-10-04 Viktor Schroeder , Hemangi Shah

We show that there is an upper bound on the injectivity radius of a hyperbolic 3-manifold in terms of the the number of generators of its fundamental group.

Geometric Topology · Mathematics 2007-05-23 Matthew E. White