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Consider a holomorphic contact manifold. Holomorphic discs tangent to the contact planes define a pseudometric on the manifold. This pseudometric integrates to a pseudodistance. When the pseudodistance is a distance, we call the contact…

Symplectic Geometry · Mathematics 2026-05-27 Filippo Bracci , Benjamin McKay , Riccardo Ugolini

A symplectic manifold $W$ with contact type boundary $M = \partial W$ induces a linearization of the contact homology of $M$ with corresponding linearized contact homology $HC(M)$. We establish a Gysin-type exact sequence in which the…

Symplectic Geometry · Mathematics 2015-05-13 Frédéric Bourgeois , Alexandru Oancea

This paper introduces a new class of geometric structures in almost contact metric geometry, which we call locally conformal almost generalized $f$-cosymplectic manifolds. These are almost contact metric structures $(\phi, \xi, \eta, g)$…

Differential Geometry · Mathematics 2026-01-27 Fortuné Massamba , Jude Rosnick Bayeni Mitoueni

A regular contact manifold is a manifold $M$ equipped with a globally defined contact form $\eta$ such that the topological space $M/\mathcal{R}$ of orbits (trajectories) of the Reeb vector field $\mathcal{R}$ of $\eta$ carries a smooth…

Symplectic Geometry · Mathematics 2023-07-27 Katarzyna Grabowska , Janusz Grabowski

In recent times a great amount of progress has been achieved in symplectic and contact geometry, leading to the development of powerful invariants of 3-manifolds such as Heegaard Floer homology and embedded contact homology. These…

Symplectic Geometry · Mathematics 2012-12-11 Daniel V. Mathews

In this paper, we compute contact homology of some quasi-regular contact structures, which admit Hamiltonian actions of Reeb type of Lie groups. We will discuss the toric contact case, (where the torus is of Reeb type), and the case of…

Symplectic Geometry · Mathematics 2009-11-02 Justin Pati

In this note we study the contact geometry of symplectic divisors. We show the contact structure induced on the boundary of a divisor neighborhood is invariant under toric and interior blow-ups and blow-downs. We also construct an open book…

Symplectic Geometry · Mathematics 2021-01-18 Tian-Jun Li , Jie Min

Let L->M be a Hermitian line bundle over a compact manifold. Write S for the space of all unitary connections in L whose curvatures define symplectic forms on M and G for the group of unitary bundle isometries of L, which acts on S by…

Symplectic Geometry · Mathematics 2017-03-24 Joel Fine

We show that contact reductions can be described in terms of symplectic reductions in the traditional Marsden-Weinstein-Meyer as well as the constant rank picture. The point is that we view contact structures as particular (homogeneous)…

Symplectic Geometry · Mathematics 2025-05-12 Katarzyna Grabowska , Janusz Grabowski

These notes are an expanded version of an introductory lecture on contact geometry given at the 2001 Georgia Topology Conference. They are intended to present some of the "topological" aspects of three dimensional contact geometry.

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

A symplectic integration of a Poisson manifold $(M,\Lambda)$ is a symplectic groupoid $(\Gamma,\eta)$ which realizes the given Poisson manifold, i.e. such that the space of units $\Gamma_0$ with the induced Poisson structure $\Lambda_0$ is…

dg-ga · Mathematics 2008-02-03 F. Alcalde-Cuesta , G. Hector

In this paper we present the theorem on Lie integrability by quadratures for time-independent Hamiltonian systems on symplectic and contact manifolds, and for time-dependent Hamiltonian systems on cosymplectic and cocontact manifolds. We…

Mathematical Physics · Physics 2024-03-01 R. Azuaje

We define Floer homology for a time-independent, or autonomous Hamiltonian on a symplectic manifold with contact type boundary, under the assumption that its 1-periodic orbits are transversally nondegenerate. Our construction is based on…

Symplectic Geometry · Mathematics 2008-04-30 Frédéric Bourgeois , Alexandru Oancea

Ideas from the theory of multisymplectic systems, introduced recently in integrable systems by the author and Kundu to discuss Liouville integrability in classical field theories with a defect, are applied to the sine-Gordon model. The key…

Mathematical Physics · Physics 2015-06-23 Vincent Caudrelier

In this paper, we apply the geometric Hamilton--Jacobi theory to obtain solutions of classical hamiltonian systems that are either compatible with a cosymplectic or a contact structure. As it is well known, the first structure plays a…

Mathematical Physics · Physics 2017-06-28 M. de León , C. Sardón

The paper intends to lay out the first steps towards constructing a unified framework to understand the symplectic and spectral theory of finite dimensional integrable Hamiltonian systems. While it is difficult to know what the best…

Dynamical Systems · Mathematics 2013-06-04 Álvaro Pelayo , San Vũ Ngoc

Many of the existing results for closed Hamiltonian G-manifolds are based on the analysis of the corresponding Hamiltonian functions using Morse-Bott techniques. In general such methods fail for non-compact manifolds or for manifolds with…

Symplectic Geometry · Mathematics 2026-05-05 Aleksandra Marinković , Klaus Niederkrüger-Eid

Modified Hamiltonians are used in the field of geometric numerical integration to show that symplectic schemes for Hamiltonian systems are accurate over long times. For nonlinear systems the series defining the modified Hamiltonian usually…

Numerical Analysis · Mathematics 2018-11-14 Shami A Alsallami , Jitse Niesen , Frank W Nijhoff

We consider symplectic manifolds with Hamiltonian torus actions which are "almost but not quite completely integrable": the dimension of the torus is one less than half the dimension of the manifold. We provide a complete set of invariants…

Symplectic Geometry · Mathematics 2007-05-23 Yael Karshon , Susan Tolman

We introduce a notion of the noncommutative integrability within a framework of contact geometry.

Symplectic Geometry · Mathematics 2012-12-13 Bozidar Jovanovic