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We prove the existence of multiple closed geodesics on non-compact cylindrica manifolds.

Analysis of PDEs · Mathematics 2007-05-23 Simone Secchi

We give a proof of the so-called generalized Waldhausen conjecture, which says that an orientable irreducible atoroidal 3-manifold has only finitely many Heegaard splittings in each genus, up to isotopy. Jaco and Rubinstein have announced a…

Geometric Topology · Mathematics 2007-05-23 Tao Li

We prove every oriented compact cyclic $3$-orbifold has a contact structure. There is another proof in the web by Daniel Herr in his uploaded thesis which depends on open book decompositions, ours is independent of that. We define…

Algebraic Topology · Mathematics 2015-12-24 Saibal Ganguli

The existence of essential closed surfaces surfaces is proven for finite coverings of 3-manifolds that are triangulated by finitely many topological ideal tetrahedra and admit a regular, negatively curved, ideal structure.

Geometric Topology · Mathematics 2021-09-03 Charalampos Charitos

In this note we construct infinitely many distinct simply connected Stein fillings of a certain infinite family of contact 3--manifolds.

Symplectic Geometry · Mathematics 2007-12-27 Anar Akhmedov , John B. Etnyre , Thomas E. Mark , Ivan Smith

We provide a proof that the classes of finitely generated Kleinian groups and of three-manifold groups are quasi-isometrically rigid.

Geometric Topology · Mathematics 2020-06-05 Peter Haïssinsky , Cyril Lecuire

This is a revised version (replacing an older one) with typos fixed and the introduction expanded.

q-alg · Mathematics 2008-02-03 Stavros Garoufalidis , Nathan Habegger

Among (isotopy classes of) automorphisms of handlebodies those called irreducible (or generic) are the most interesting, analogues of pseudo-Anosov automorphisms of surfaces. We consider the problem of isotoping an irreducible automorphism…

Geometric Topology · Mathematics 2009-02-21 Leonardo Navarro Carvalho

We say that a contact manifold is Milnor fillable if it is contactomorphic to the contact boundary of an isolated complex-analytic singularity (X,x). Generalizing results of Milnor and Giroux, we associate to each holomorphic function f…

Symplectic Geometry · Mathematics 2007-05-23 C. Caubel , A. Nemethi , P. Popescu-Pampu

It is natural to ask how many isotopy classes of embedded essential surfaces lie in a given 3-manifold. The first bounds on the number of such surfaces were exponential, using normal surfaces. More recently, by restricting to alternating…

Geometric Topology · Mathematics 2025-10-16 Jessica S. Purcell , Anastasiia Tsvietkova

We introduce a variant of contact homology for convex open contact manifolds. As an application, we prove the existence of (in fact, infinitely many) exotic tight contact structures on $\mathbb{R}^{2n-1}$ for all $n>2$.

Symplectic Geometry · Mathematics 2025-06-12 François-Simon Fauteux-Chapleau , Joseph Helfer

In response to a question raised by Belolipetsky and the first author, we prove that for every finite group $G$ there are infinitely many isomorphism classes of compact complex hyperbolic $2$-manifolds with automorphism group isomorphic to…

Geometric Topology · Mathematics 2025-12-23 Alexander Lubotzky , Matthew Stover

We introduce the notion of asymptotically finitely generated contact structures, which states essentially that the Symplectic Homology in a certain degree of any filling of such contact manifolds is uniformly generated by only finitely many…

Symplectic Geometry · Mathematics 2020-07-20 Alexander Fauck

It is a basic question in contact geometry to classify all non-isotopic tight contact structures on a given 3-manifold. If the manifold has a boundary, we need also specify the dividing set on the boundary. In this paper, we answer the…

Geometric Topology · Mathematics 2020-07-24 Zhenkun Li , Jessica J. Zhang

We determine the closed, oriented Seifert fibered 3-manifolds which carry positive tight contact structures. Our main tool is a new non-vanishing criterion for the contact Ozsvath-Szabo invariant.

Symplectic Geometry · Mathematics 2019-12-19 Paolo Lisca , Andras I. Stipsicz

This note is about a little extension of Nash's embedding theorem in the case of complete manifolds.

Differential Geometry · Mathematics 2016-05-23 Olaf Müller

In this paper, we proved that any closed orientable 3-manifold 1-dominates at most finitely many geometric 3-manifolds.

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

In this paper, we introduce a particularly nice family of locally CAT(-1) spaces, which we call hyperbolic P-manifolds. For $X^3$ a simple, thick hyperbolic P-manifold of dimension 3, we show that certain subsets of the boundary at infinity…

Group Theory · Mathematics 2007-05-23 J. -F. Lafont

In this note we prove that the mapping class group of a compact topological manifold $M$ with boundary is of finite type, under assumptions on its dimension and connectivity.

Geometric Topology · Mathematics 2024-04-04 Alexander Kupers

We present a short elementary proof of an existence theorem of certain CAT(-1)-surfaces in open hyperbolic 3-manifolds. The main construction lemma in Calegari and Gabai's proof of Marden's Tameness Conjecture can be replaced by an…

Geometric Topology · Mathematics 2009-03-03 Teruhiko Soma