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The original Arnold chord conjecture states that every closed Legendrian submanifold of the standard contact sphere $S^{2n-1}$ admits a Reeb chord with distinct endpoints with respect to any contact form. In this paper, we prove this…

Symplectic Geometry · Mathematics 2025-12-08 Jungsoo Kang

We prove that for a large and important class of $C^1$ twist maps of the torus periodic and quasi-periodic orbits of a new type exist, provided that there are no rotational invariant circles (R.I.C's). These orbits have a non-zero…

Dynamical Systems · Mathematics 2009-11-07 S Addas Zanata

We study analytic torsion and eta like invariants on CR contact manifolds of any dimension admitting a circle transverse action, and equipped with a unitary representation. We show that, when defined using the spectrum of relevant operators…

Differential Geometry · Mathematics 2024-10-08 Michel Rumin

Links of singularity and generalized algebraic links are ways of constructing three-manifolds and smooth links inside them from potentially singular complex algebraic surfaces and complex curves inside them. We prove that knot lattice…

Geometric Topology · Mathematics 2024-02-02 Seppo Niemi-Colvin

In formulating a non-orientable analogue of the Milnor Conjecture on the $4$-genus of torus knots, Batson developed an elegant construction that produces a smooth non-orientable spanning surface in $B^4$ for a given torus knot in $S^3$.…

Geometric Topology · Mathematics 2023-03-16 Joshua M. Sabloff

We prove some classification results for tight contact structure in the 3-space, -ball and -sphere that are invariant with respect to some arbitrary involution, that is conjugated to the standard rotation around the x-axis. Unlike the…

Geometric Topology · Mathematics 2026-01-21 Mirko Torresani

Rabinowitz-Floer homology is the Morse-Bott homology in the sense of Floer associated with the Rabinowitz action functional introduced by Kai Cieliebak and Urs Frauenfelder in 2009. In this manuscript, we consider a generalisation of this…

Symplectic Geometry · Mathematics 2026-02-02 Yannis Bähni

In this paper, we provide new and simpler proofs of two theorems of Gluck and Harrison on contact structures induced by great circle or line fibrations. Furthermore, we prove that a geodesic vector field whose Jacobi tensor is parallel…

Symplectic Geometry · Mathematics 2024-03-20 Tilman Becker

We define an invariant of transverse links in the standard contact 3-sphere as a distinguished element of the Khovanov homology of the link. The quantum grading of this invariant is the self-linking number of the link. For knots, this gives…

Geometric Topology · Mathematics 2007-05-23 Olga Plamenevskaya

We introduce a new real-valued invariant called the natural slope of a hyperbolic knot in the 3-sphere, which is defined in terms of its cusp geometry. We show that twice the knot signature and the natural slope differ by at most a constant…

Geometric Topology · Mathematics 2024-09-04 Alex Davies , András Juhász , Marc Lackenby , Nenad Tomasev

We draw connections between the field of contact topology and the study of Beltrami fields in hydrodynamics on Riemannian manifolds in dimension three. We demonstrate an equivalence between Reeb fields (vector fields which preserve a…

dg-ga · Mathematics 2008-02-03 J. Etnyre , R. Ghrist

In this work, it is shown that a simply-connected, rationally-elliptic torus orbifold is equivariantly rationally homotopy equivalent to the quotient of a product of spheres by an almost-free, linear torus action, where this torus has rank…

Differential Geometry · Mathematics 2018-10-02 Fernando Galaz-Garcia , Martin Kerin , Marco Radeschi , Michael Wiemeler

The Reeb space of a smooth function is a topological and combinatoric object and fundamental and important in understanding topological and geometric properties of the manifold of the domain. It is the graph and a topological space endowed…

General Topology · Mathematics 2024-12-29 Naoki Kitazawa

It is known that the colored Jones polynomials of a knot in the 3-dimensional sphere satisfy recursive relations, it is also known that these recursive relations come from recurrence polynomials which have been related, by the AJ…

Geometric Topology · Mathematics 2024-10-08 Sunday Esebre , Razvan Gelca

We study dynamical constraints arising from Embedded Contact Homology (ECH) in the spatial isosceles three-body problem. For energies below the critical level, the dynamics on the energy surface is identified with a Reeb flow on the tight…

Symplectic Geometry · Mathematics 2026-03-02 Xijun Hu , Lei Liu , Yuwei Ou , Zhiwen Qiao , Pedro A. S. Salomão

In this paper we show that the non-alternating torus knots are homologically thick, i.e. that their Khovanov homology occupies at least three diagonals. Furthermore, we show that we can reduce the number of full twists of the torus knot…

Geometric Topology · Mathematics 2014-10-01 Marko Stosic

Let K \subset Y be a knot in a three manifold which admits a longitude-framed surgery such that the surgered manifold has first Betti number greater than that of Y. We find a formula which computes the twisted Floer homology of the surgered…

Geometric Topology · Mathematics 2009-10-13 Evan Fink

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

We define a differential graded algebra associated to Legendrian knots in Seifert fibered spaces with transverse contact structures. This construction is distinguished from other combinatorial realizations of contact homology invariants by…

Symplectic Geometry · Mathematics 2010-12-14 Joan E. Licata , Joshua M. Sabloff

We compute the equivariant index of the twisted horizontal Dolbeault operator on compact toric contact manifolds of Reeb type. The operator is elliptic transverse to the Reeb foliation and its equivariant index defines a distribution on the…

Differential Geometry · Mathematics 2023-06-28 Pedram Hekmati , Marcos Orseli