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Let Q be a Riemannian manifold such that the Betti numbers of its free loop space with respect to some coefficient field are unbounded. We show that every contact form on its unit contangent bundle supporting the natural contact structure…

Symplectic Geometry · Mathematics 2012-06-20 Mark McLean

For Reeb vector fields on closed 3-manifolds, cylindrical contact homology is used to show that the existence of a set of closed Reeb orbit with certain knotting/linking properties implies the existence of other Reeb orbits with other…

Symplectic Geometry · Mathematics 2015-03-17 Al Momin

The aim of this article is to apply a Floer theory to study symmetric periodic Reeb orbits. We define positive equivariant wrapped Floer homology using a (anti-)symplectic involution on a Liouville domain and investigate its algebraic…

Symplectic Geometry · Mathematics 2021-02-10 Joontae Kim , Seongchan Kim , Myeonggi Kwon

We show that whenever a Hamiltonian diffeomorphism or a Reeb flow has a finite number of periodic orbits, the mean indices of these orbits must satisfy a resonance relation, provided that the ambient manifold meets some natural…

Symplectic Geometry · Mathematics 2009-07-10 Viktor L. Ginzburg , Ely Kerman

We study the $J-$holomorphic curves in the symplectization of the contact manifolds and prove that there exists at least one periodic Reeb orbits in any closed contact manifold with any contact form by using the well-known Gromov's…

Differential Geometry · Mathematics 2012-09-19 Renyi Ma

In this paper we prove two isomorphisms in the local symplectic homology of a simple, which is to say non iterated, isolated Reeb orbit. The isomorphisms are in $S^1$-equivariant and nonequivariant symplectic homology, relating the local…

Symplectic Geometry · Mathematics 2020-10-06 Elijah Fender

We develop methods for studying the smooth closing lemma for Reeb flows in any dimension using contact homology. As an application, we prove a conjecture of Irie, stating that the strong closing lemma holds for Reeb flows on ellipsoids. Our…

Symplectic Geometry · Mathematics 2022-11-08 Julian Chaidez , Ipsita Datta , Rohil Prasad , Shira Tanny

A long standing conjecture in Hamiltonian Dynamics states that every contact form on the standard contact sphere $S^{2n+1}$ has at least $n+1$ simple periodic Reeb orbits. In this work, we consider a refinement of this problem when the…

Symplectic Geometry · Mathematics 2024-04-25 Miguel Abreu , Hui Liu , Leonardo Macarini

We prove that every non-degenerate Reeb flow on a closed contact manifold $M$ admitting a strong symplectic filling $W$ with vanishing first Chern class carries at least two geometrically distinct closed orbits provided that the positive…

Symplectic Geometry · Mathematics 2021-07-01 Miguel Abreu , Jean Gutt , Jungsoo Kang , Leonardo Macarini

We study the existence of multiple closed Reeb orbits on some contact manifolds by means of $S^1$-equivariant symplectic homology and the index iteration formula. It is proved that a certain class of contact manifolds which admit…

Symplectic Geometry · Mathematics 2014-10-16 Jungsoo Kang

We study Reeb dynamics on the three-sphere equipped with a tight contact form and an anti-contact involution. We prove the existence of a symmetric periodic orbit and provide necessary and sufficient conditions for it to bound an invariant…

Dynamical Systems · Mathematics 2021-06-30 Seongchan Kim

The aim of the paper is three-fold. We begin by proving a formula, both global and local versions, relating the number of periodic orbits of an iterated map and the Lefschetz numbers, or indices in the local case, of its iterations. This…

Symplectic Geometry · Mathematics 2013-11-05 Viktor L. Ginzburg , Yusuf Gören

We prove that, for a $C^\infty$-generic contact form $\lambda$ adapted to a given contact distribution on a closed three-manifold, there exists a sequence of periodic Reeb orbits which is equidistributed with respect to $d\lambda$. This is…

Symplectic Geometry · Mathematics 2019-03-08 Kei Irie

We use Hamiltonian Floer theory to recover and generalize a classic rigidity theorem of Ekelend and Lasry. That theorem can be rephrased as an assertion about the existence of multiple closed Reeb orbits for certain tight contact forms on…

Symplectic Geometry · Mathematics 2019-02-20 Ely Kerman

Consider a symplectic surface in a three-dimensional contact manifold with boundary on Reeb orbits (periodic orbits of the Reeb vector field). We assume that the rotation numbers of the boundary Reeb orbits satisfy a certain inequality, and…

Symplectic Geometry · Mathematics 2025-05-23 Michael Hutchings

We investigate the effect of a hyperbolic (or, more generally, isolated as an invariant set) closed Reeb orbit on the dynamics of a Reeb flow on the $(2n-1)$-dimensional standard contact sphere, extending two results previously known for…

Symplectic Geometry · Mathematics 2025-11-27 Erman Cineli , Viktor L. Ginzburg , Basak Z. Gurel , Marco Mazzucchelli

A long-standing conjecture in Hamiltonian Dynamics states that the Reeb flow of any convex hypersurface in $\mathbb{R}^{2n}$ carries an elliptic closed orbit. Two important contributions toward its proof were given by Ekeland in 1986 and…

Symplectic Geometry · Mathematics 2017-03-08 Miguel Abreu , Leonardo Macarini

Using the wrapped Floer homology, we prove the existence of consecutive collisions at the primaries in the circular restricted three-body problem. We also prove the existence of a symmetric periodic orbit. These existence results are…

Symplectic Geometry · Mathematics 2025-12-29 Filip Broćić , Urs Frauenfelder

In a neighborhood of a hyperbolic periodic orbit of a volume-preserving flow on a manifold of dimension 3, we define and show the existence of a normal form for the generator of the flow that encodes the dynamics. If the flow is a contact…

Dynamical Systems · Mathematics 2025-12-10 Alena Erchenko , Kurt Vinhage , Yun Yang

We introduce the notion of a pseudo-Anosov contact structure, which admits a type of singular contact form with pseudo-Anosov Reeb flow. We prove that contact homology detects the free homotopy classes of closed orbits of any pseudo-Anosov…

Symplectic Geometry · Mathematics 2026-01-06 Julian Chaidez , Yijie Pan
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