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We make a first step towards connecting the theory of veering triangulations and bicontact structures as tools for studying (pseudo-)Anosov flows: We show that given a veering triangulation corresponding to an Anosov flow with orientable…

Geometric Topology · Mathematics 2026-04-09 Chi Cheuk Tsang

We survey the interactions between foliations and contact structures in dimension three, with an emphasis on sutured manifolds and invariants of sutured contact manifolds. This paper contains two original results: the fact that a closed…

Symplectic Geometry · Mathematics 2018-11-26 Vincent Colin , Ko Honda

We define the notion of special Lagrangian curvature, showing how it may be interpreted as an alternative higher dimensional generalisation of two dimensional Gaussian curvature. We obtain first a local rigidity result for this curvature…

Differential Geometry · Mathematics 2008-07-16 Graham Smith

We classify contact toric 3-manifolds up to contactomorphism, through explicit descriptions, building off of work by Lerman [Lerman03]. As an application, we classify all contact structures on 3-manifolds that can be realised as a concave…

Symplectic Geometry · Mathematics 2025-01-17 Aleksandra Marinković , Laura Starkston

In this thesis, we use normal surface theory to understand certain properties of minimal triangulations of compact orientable 3-manifolds. We describe the collapsing process of normal 2-spheres and disks. Using some geometrical…

Geometric Topology · Mathematics 2009-09-29 Alexander Barchechat

We give explicit formulas and algorithms for the computation of the Thurston-Bennequin invariant of a nullhomologous Legendrian knot on a page of a contact open book and on contact Heegaard surfaces. Furthermore, we extend the results to…

Geometric Topology · Mathematics 2026-02-10 Sebastian Durst , Marc Kegel , Mirko Klukas

In this paper we study the growth rate of a version of Legendrian contact homology, which we call strip Legendrian contact homology, in 3-dimensional contact manifolds and its relation to the topological entropy of Reeb flows. We show that:…

Symplectic Geometry · Mathematics 2017-05-10 Marcelo R. R. Alves

Cosymplectic and normal almost contact structures are analogues of symplectic and complex structures that can be defined on 3-manifolds. Their existence imposes strong topological constraints. Generalized geometry offers a natural common…

Differential Geometry · Mathematics 2026-05-21 Joan Porti , Roberto Rubio

We develop the deformation theory of hyperbolic cone-3-manifolds with cone-angles less than $2\pi$, i.e. contained in the interval $(0,2\pi)$. In the present paper we focus on deformations keeping the topological type of the cone-manifold…

Differential Geometry · Mathematics 2013-03-13 Hartmut Weiss

We show that there exist infinitely many closed contact 3-manifolds containing half Giroux torsion along a separating torus whose contact invariants do not vanish. This provides counterexamples to Ghiggini's conjecture and suggests that…

Geometric Topology · Mathematics 2025-07-25 Hyunki Min , Konstantinos Varvarezos

We prove a compactness theorem for holomorphic curves in 4-dimensional symplectizations that have embedded projections to the underlying 3-manifold. It strengthens the cylindrical case of the SFT compactness theorem by using intersection…

Symplectic Geometry · Mathematics 2008-03-07 Chris Wendl

In this paper, we consider decompositions of 3-manifolds with three handlebodies. We classify such decompositions of the 3-sphere and lens spaces with small genera. These decompositions admit operations called stabilizations. We also…

Geometric Topology · Mathematics 2021-05-11 Yasuyoshi Ito , Masaki Ogawa

We show that a transverse link in a contact structure supported by an open book decomposition can be transversely braided. We also generalize Markov's theorem on when the closures of two braids represent (transversely) isotopic links.

Geometric Topology · Mathematics 2015-03-13 Elena Pavelescu

We propose in this paper a method for studying contact structures in 3-manifolds by means of branched surfaces. We explain what it means for a contact structure to be carried by a branched surface embedded in a 3-manifold. To make the…

Geometric Topology · Mathematics 2009-09-29 Ulrich Oertel , Jacek Swiatkowski

This paper is an overview of the idea of using contact geometry to construct invariants of immersions and embeddings. In particular, it discusses how to associate a contact manifold to any manifold and a Legendrian submanifold to an…

Geometric Topology · Mathematics 2007-05-23 Tobias Ekholm , John B. Etnyre

This is the less official, English version of the proof of the fact that every closed atoroidal 3-manifold carries finitely many isotopy classes of tight contact structures.

Geometric Topology · Mathematics 2007-05-23 Vincent Colin , Emmanuel Giroux , Ko Honda

We show that every closed toroidal irreducible orientable 3-manifold carries infinitely many universally tight contact structures.

Geometric Topology · Mathematics 2016-09-07 Vincent Colin

In this note we observe that while all overtwisted contact structures on compact 3--manifolds are supported by planar open book decompositions, not all contact structures are. This has relevance to invariants of contact structures and also…

Symplectic Geometry · Mathematics 2007-05-23 John B. Etnyre

We relate open book decompositions of a 4-manifold M with its Engel structures. Our main result is, given an open book decomposition of M whose binding is a collection of 2-tori and whose monodromy preserves a framing of a page, the…

Symplectic Geometry · Mathematics 2018-12-19 Vincent Colin , Francisco Presas , Thomas Vogel

We study a cone structure ${\mathcal C} \subset {\mathbb P} D$ on a holomorphic contact manifold $(M, D \subset T_M)$ such that each fiber ${\mathcal C}_x \subset {\mathbb P} D_x$ is isomorphic to a Legendrian submanifold of fixed…

Differential Geometry · Mathematics 2020-10-22 Jun-Muk Hwang