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Motivated by the moduli theory of taut contact circles on spherical 3-manifolds, we relate taut contact circles to transversely holomorphic flows. We give an elementary survey of such 1-dimensional foliations from a topological viewpoint.…

Differential Geometry · Mathematics 2017-09-01 Hansjörg Geiges , Jesús Gonzalo

We draw connections between contact topology and Maxwell fields in vacuo on 3-dimensional closed Riemannian submanifolds in 4-dimensional Lorentzian manifolds. This is accomplished by showing that contact topological methods can be applied…

Mathematical Physics · Physics 2024-09-17 Shin-itiro Goto

A Kuranishi space is a topological space with a Kuranishi structure, defined by Fukaya and Ono. Kuranishi structures occur naturally on moduli spaces of J-holomorphic curves in symplectic geometry. Let Y be an orbifold and R a commutative…

Symplectic Geometry · Mathematics 2008-10-22 Dominic Joyce

We construct an oriented cobordism between moduli spaces of flat connections on the three holed sphere and disjoint unions of toric varieties, together with a closed two-form which restricts to the symplectic forms on the ends. As…

dg-ga · Mathematics 2008-02-03 Eckhard Meinrenken , Chris Woodward

We develop a systematic approach to contact and Jacobi structures on graded supermanifolds. In this framework, contact structures are interpreted as symplectic principal GL(1,R)-bundles. Gradings compatible with the GL(1,R)-action lead to…

Differential Geometry · Mathematics 2017-01-26 Janusz Grabowski

We classify compact manifolds of dimension three equipped with a path structure and a fixed contact form (which we refer to as a strict path structure) under the hypothesis that their automorphism group is non-compact. We use a Cartan…

Differential Geometry · Mathematics 2023-03-09 Elisha Falbel , Martin Mion-Mouton , Jose Miguel Veloso

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 present simple examples of finite-dimensional connected homogeneous spaces (they are actually topological manifolds) with nonhomogeneous and nonrigid factors. In particular, we give an elementary solution of an old problem in general…

Geometric Topology · Mathematics 2012-03-21 M. Cárdenas , F. F. Lasheras , A. Quintero , D. Repovš

Let $L\subset J^1(M)$ be a Legendrian submanifold of the 1-jet space of a Riemannian $n$-manifold $M$. A correspondence is established between rigid flow trees in $M$ determined by $L$ and boundary punctured rigid pseudo-holomorphic disks…

Symplectic Geometry · Mathematics 2014-11-11 Tobias Ekholm

We survey what is known about various special types of submanifolds of contact manifolds and discuss their role in the development of contact geometry.

Symplectic Geometry · Mathematics 2025-10-08 John B. Etnyre

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

Let $M$ be a connected compact contact toric manifold. Most of such manifolds are of Reeb type. We show that if $M$ is of Reeb type, then $\pi_1(M)$ is finite cyclic, and we describe how to obtain the order of $\pi_1(M)$ from the moment map…

Symplectic Geometry · Mathematics 2023-08-30 Hui Li

This paper helps to clarify the status of cylindrical contact homology, a conjectured contact invariant introduced by Eliashberg, Givental, and Hofer in 2000. We explain how heuristic arguments fail to yield a well-defined homological…

Symplectic Geometry · Mathematics 2015-06-16 Jo Nelson

Homotopy comomentum maps are a higher generalization of the notion of moment map introduced to extend the concept of Hamiltonian actions to the framework of multisymplectic geometry. Loosely speaking, higher means passing from considering…

Symplectic Geometry · Mathematics 2025-11-10 Antonio Michele Miti

We prove that certain non-exact magnetic Hamiltonian systems on products of closed hyperbolic surfaces and with a potential function of large oscillation admit non-constant contractible periodic solutions of energy below the Ma\~n\'e…

Symplectic Geometry · Mathematics 2020-08-17 Youngjin Bae , Kevin Wiegand , Kai Zehmisch

We make some elementary observations concerning subcritically Stein fillable contact structures on 5-manifolds. Specifically, we determine the diffeomorphism type of such contact manifolds in the case the fundamental group is finite cyclic,…

Geometric Topology · Mathematics 2019-08-15 Fan Ding , Hansjörg Geiges , Guangjian Zhang

We study constructions of contact forms on closed manifolds. A notion of strong symplectic fold structure is defined and we prove that there is a contact form on $M \x X$ provided that $M$ admits such a structure and $X$ is contact. This…

Symplectic Geometry · Mathematics 2013-08-13 Bogusław Hajduk , Rafał Walczak

Applying a general categorical construction for the extension of dualities, we present a new proof of the Fedorchuk duality between the category of compact Hausdorff spaces with their quasi-open mappings and the category of complete normal…

General Topology · Mathematics 2019-06-14 G. Dimov , E. Ivanova-Dimova , W. Tholen

A pair of transverse contact distributions on a 3-manifold will in general admit no 1-parameter families of symmetries: a flow preserving both contact distributions. Here, we will determine local normal forms for such pairs admitting…

Differential Geometry · Mathematics 2025-10-03 Connor Jackman

For every hyperbolic group and more general hyperbolic graphs, we construct an equivariant ideal bicombing: this is a homological analogue of the geodesic flow on negatively curved manifolds. We then construct a cohomological invariant…

Group Theory · Mathematics 2012-07-10 I. Mineyev , N. Monod , Y. Shalom
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