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Starting from the work of Bhupal, we extend to the contact case the Viterbo capacity and Traynor's construction of symplectic homology. As an application we get a new proof of the Non-Squeezing Theorem of Eliashberg, Kim and Polterovich.

Symplectic Geometry · Mathematics 2011-10-24 Sheila Sandon

This paper is concerned with the rational symplectic field theory in the Floer case. For this observe that in the general geometric setup for symplectic field theory the contact manifolds can be replaced by mapping tori of symplectic…

Symplectic Geometry · Mathematics 2009-01-13 Oliver Fabert

We formulate and study a generalized virial theorem for contact Hamiltonian systems. Such systems describe mechanical systems in the presence of simple dissipative forces such as Rayleigh friction, or the vertical motion of a particle…

Mathematical Physics · Physics 2026-01-06 Aritra Ghosh

We define $S^1$-equivariant symplectic homology for symplectically aspherical manifolds with contact boundary, using a Floer-type construction first proposed by Viterbo. We show that it is related to the usual symplectic homology by a Gysin…

Symplectic Geometry · Mathematics 2013-12-23 Frédéric Bourgeois , Alexandru Oancea

After observing that the well-known convexity theorems of symplectic geometry also hold for compact contact manifolds with an effective action of a torus whose Reeb vector field corresponds to an element of the Lie algebra of the torus, we…

Differential Geometry · Mathematics 2009-10-31 Charles P. Boyer , Krzysztof Galicki

A translated point of a contactomorphism $\phi$ on a contact manifold with contact form $\alpha$ is a point $p$ where $\alpha$ is preserved under $\phi$ and whose image under $\phi$ lies in the same Reeb trajectory. They were introduced as…

Symplectic Geometry · Mathematics 2021-04-16 Aaron Gootjes-Dreesbach

In this work we introduce contact Hamiltonian mechanics, an extension of symplectic Hamiltonian mechanics, and show that it is a natural candidate for a geometric description of non-dissipative and dissipative systems. For this purpose we…

Mathematical Physics · Physics 2017-03-08 Alessandro Bravetti , Hans Cruz , Diego Tapias

We study the classical and semiclassical time evolutions of subsystems of a Hamiltonian system; this is done using a generalization of Heller's thawed Gaussian approximation introduced by Littlejohn. The key tool in our study is an…

Quantum Physics · Physics 2020-07-17 Maurice A. de Gosson

We introduce the notion of asymptotically finitely generated contact structures, which states essentially that the Symplectic Homology in a certain degree of any filling of such contact manifolds is uniformly generated by only finitely many…

Symplectic Geometry · Mathematics 2020-07-20 Alexander Fauck

We prove a common extension of Bang's and Kadets' lemmas for contact pairs, in the spirit of the Colourful Carath\'eodory Theorem. We also formulate a generalized version of the affine plank problem and prove it under special assumptions.…

Metric Geometry · Mathematics 2022-06-06 Gergely Ambrus

In this paper we prove a KAM-like theorem of symplectic algorithms for nearly integrable Hamiltonian systems which generalises the result of \cite{r1} and \cite{r6} for the case of integrable systems.

Dynamical Systems · Mathematics 2024-02-23 Zaijiu Shang , Yang Xu

The aim of this paper is to develop a Hamilton--Jacobi theory for contact Hamiltonian systems. We find several forms for a suitable Hamilton-Jacobi equation accordingly to the Hamiltonian and the evolution vector fields for a given…

Mathematical Physics · Physics 2021-07-06 Manuel de León , Manuel Laínz , Álvaro Muñiz--Brea

Using SFT techniques, Eliashberg, Kim and Polterovich (2006) proved that if $\pi R_2^2 \leq K \leq \pi R_1^2$ for some integer $K$ then there is no contact squeezing in $\mathbb{R}^{2n} \times S^1$ of the prequantization of the ball of…

Symplectic Geometry · Mathematics 2025-04-16 Maia Fraser , Sheila Sandon , Bingyu Zhang

We propose a novel approach to contact Hamiltonian mechanics which, in contrast to the one dominating in the literature, serves also for non-trivial contact structures. In this approach Hamiltonians are no longer functions on the contact…

Symplectic Geometry · Mathematics 2022-11-03 Katarzyna Grabowska , Janusz Grabowski

Using Floer-theoretic methods, we prove that the non-existence of an exotic symplectomorphism on the standard symplectic ball, $\mathbb{B}^{2n},$ implies a rather strict topological condition on the free contact circle actions on the…

Symplectic Geometry · Mathematics 2023-06-19 Dusan Drobnjak , Igor Uljarevic

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

We investigate lattice-counting problems associated with symplectic forms from the perspective of homogeneous dynamics. In the qualitative direction, we establish an analog of Margulis theorem for symplectic forms, proving density results…

Dynamical Systems · Mathematics 2025-11-04 Jiyoung Han

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

A point q in a contact manifold is called a translated point for a contactomorphism \phi, with respect to some fixed contact form, if \phi (q) and q belong to the same Reeb orbit and the contact form is preserved at q. The problem of…

Symplectic Geometry · Mathematics 2012-06-19 Sheila Sandon

We prove contact big fiber theorems, analogous to the symplectic big fiber theorem by Entov and Polterovich, using symplectic cohomology with support. Unlike in the symplectic case, the validity of the statements requires conditions on the…

Symplectic Geometry · Mathematics 2026-02-13 Yuhan Sun , Igor Uljarevic , Umut Varolgunes
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