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The 2011 PhD thesis of Farris demonstrated that the ECH of a prequantization bundle over a Riemann surface is isomorphic as a Z/2Z-graded group to the exterior algebra of the homology of its base. We extend this result by computing the…

Symplectic Geometry · Mathematics 2024-05-22 Jo Nelson , Morgan Weiler

ECH capacities were developed by Hutchings to study embedding problems for symplectic $4$-manifolds with boundary. They have found especial success in the case of certain toric symplectic manifolds where many of the computations resemble…

Symplectic Geometry · Mathematics 2022-02-17 Ben Wormleighton

In this paper, we construct singular Lagrangian fibrations on some examples of disk cotangent bundles in dimensions 4 and 6. As an application, we show how this construction can be used to obtain toric domains in some cases. In particular,…

Symplectic Geometry · Mathematics 2025-06-03 Santiago Achig-Andrango , Renato Vianna , Alejandro Vicente

We prove that symplectic cohomology for open convex symplectic manifolds is invariant when the symplectic form undergoes deformations which may be non-exact and non-compactly supported, provided one uses the correct local system of…

Symplectic Geometry · Mathematics 2020-10-01 Gabriele Benedetti , Alexander F. Ritter

We prove that the space of symplectic packings of ${\Bbb C}P^2$ by $k$ equal balls is connected for $3\leq k\leq 6$. The proof is based on Gromov-Witten invariants and on the inflation technique due to Lalonde and McDuff.

dg-ga · Mathematics 2008-02-03 Paul Biran

We describe Lefschetz-Bott fibrations on complex line bundles over symplectic manifolds explicitly. As an application, we construct more than one strong symplectic filling of the link of the $A_{k}$-type singularity. In the appendix, we…

Geometric Topology · Mathematics 2019-04-02 Takahiro Oba

In this paper, we investigate the $L^2$-Dolbeault cohomology of the symmetric power of cotangent bundles of ball quotients with finite volume, as well as their toroidal compactification. Through the application of Hodge theory for complete…

Complex Variables · Mathematics 2026-01-14 Seungjae Lee , Aeryeong Seo

We prove the uniqueness, up to diffeomorphism, of symplectically aspherical fillings of the unit cotangent bundle of odd-dimensional spheres. As applications, we first show the non-existence of exact symplectic cobordisms between some…

Symplectic Geometry · Mathematics 2025-12-23 Myeonggi Kwon , Takahiro Oba

Given an exact symplectic cobordism $(X, \lambda)$ between contact $3$-manifolds $(Y_+, \lambda_+)$ and $(Y_-, \lambda_-)$ with no elliptic Reeb orbits up to a certain action, we define a chain map from the embedded contact homology (ECH)…

Symplectic Geometry · Mathematics 2020-12-03 Jacob Rooney

In this note we study the behavior of symplectic cohomology groups under symplectic deformations. Moreover, we show that for compact almost-K\"ahler manifolds $(X,J,g,\omega)$ with $J$ $\mathcal{C}^\infty$-pure and full the space of de Rham…

Symplectic Geometry · Mathematics 2019-01-25 Nicoletta Tardini , Adriano Tomassini

Let Y be a closed oriented 3-manifold with a contact form such that all Reeb orbits are nondegenerate. The embedded contact homology (ECH) index associates an integer to each relative 2-dimensional homology class of surfaces whose boundary…

Symplectic Geometry · Mathematics 2008-10-22 Michael Hutchings

Let k>2. We prove that the cotangent bundles of oriented homotopy (2k-1)-spheres S and S' are symplectomorphic only if the classes defined by S and S' agree up to sign in the quotient group of oriented homotopy spheres modulo those which…

Symplectic Geometry · Mathematics 2015-09-21 Tobias Ekholm , Thomas Kragh , Ivan Smith

The classical Gromov width measures the largest symplectic ball embeddable into a symplectic manifold; inspired by the symplectic camel problem, we generalize this to ask how large a symplectic ball can be embedded as a family over a…

Symplectic Geometry · Mathematics 2025-05-29 Filip Broćić , Dylan Cant

Given two four-dimensional symplectic manifolds, together with knots in their boundaries, we define an ``anchored symplectic embedding'' to be a symplectic embedding, together with a two-dimensional symplectic cobordism between the knots…

Symplectic Geometry · Mathematics 2025-12-09 Michael Hutchings , Agniva Roy , Morgan Weiler , Yuan Yao

In this second paper of a two-part series, we prove that whenever a contact 3-manifold admits a uniform spinal open book decomposition with planar pages, its (weak, strong and/or exact) symplectic and Stein fillings can be classified up to…

Symplectic Geometry · Mathematics 2026-04-06 Samuel Lisi , Jeremy Van Horn-Morris , Chris Wendl

We examine the structure of the cotangent bundle $T^{*}X$ of an algebraic variety $X$ acted on by a reductive group $G$ from the viewpoint of equivariant symplectic geometry. In particular, we construct an equivariant symplectic covering of…

Algebraic Geometry · Mathematics 2007-05-23 Dmitri A. Timashev

We construct a family version of symplectic Floer cohomology for magnetic cotangent bundles, without any restrictions on the magnetic form, using the dissipative method for compactness introduced in \cite{Groman2015}. As an application, we…

Symplectic Geometry · Mathematics 2022-01-10 Yoel Groman , Will J. Merry

We introduce a chain complex associated to a Liouville domain $(\overline{W}, d\lambda)$ whose boundary $Y$ admits a Boothby--Wang contact form (i.e. is a prequantization space). The differential counts cascades of Floer solutions in the…

Symplectic Geometry · Mathematics 2018-11-26 Luís Diogo , Samuel T. Lisi

We construct new families of symplectic capacities indexed by certain symmetric polynomials, defined using rational symplectic field theory. In particular, we introduce a sequence of capacities based on an L-infinity structure on linearized…

Symplectic Geometry · Mathematics 2025-12-24 Kyler Siegel

We consider certain type of fiber bundles with odd dimensional compact contact base, exact symplectic fibers, and the structure group contained in the group of exact symplectomorphisms of the fiber. We call such fibrations "contact…

Geometric Topology · Mathematics 2014-03-24 M. Firat Arikan