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We consider the derived categories of modules over a certain family A_m of graded rings, and Floer cohomology of Lagrangian intersections in the symplectic manifolds which are the Milnor fibres of simple singularities of type A_m. We show…

Quantum Algebra · Mathematics 2007-05-23 Mikhail Khovanov , Paul Seidel

Given a closed, orientable Lagrangian submanifold $L$ in a symplectic manifold $(X, \omega)$, we show that if $L$ is relatively exact then any Hamiltonian diffeomorphism preserving $L$ setwise must preserve its orientation. In contrast to…

Symplectic Geometry · Mathematics 2024-05-06 Jack Smith

We define a quantitative invariant of Liouville cobordisms with monotone filling through an action-completed symplectic cohomology theory. We illustrate the non-trivial nature of this invariant by computing it for annulus subbundles of the…

Symplectic Geometry · Mathematics 2018-02-21 Sara Venkatesh

Let $(M,\omega)$ be a symplectic manifold compact or convex at infinity. Consider a closed Lagrangian submanifold $L$ such that $\omega |_{\pi_2(M,L)}=0$ and $\mu|_{\pi_2(M,L)}=0$, where $\mu$ is the Maslov index. Given any Lagrangian…

Symplectic Geometry · Mathematics 2009-03-23 Rémi Leclercq

This article is a survey of a series of papers [FOOO3,FOOO4,FOOO5] in which we developed the method of calculation of Floer cohomology of Lagrangian torus orbits in compact toric manifolds, and its applications to symplectic topology and to…

Symplectic Geometry · Mathematics 2010-11-18 Kenji Fukaya , Yong-Geun Oh , Hiroshi Ohta , Kaoru Ono

Given a Liouville manifold $M$, we introduce an invariant of $M$ that we call the Heegaard Floer symplectic cohomology $SH^*_\kappa(M)$ for any $\kappa \ge 1$ that coincides with the symplectic cohomology for $\kappa=1$. Writing $\hat{M}$…

Symplectic Geometry · Mathematics 2025-08-13 Roman Krutowski , Tianyu Yuan

We introduce new finite-dimensional cohomologies on symplectic manifolds. Each exhibits Lefschetz decomposition and contains a unique harmonic representative within each class. Associated with each cohomology is a primitive cohomology…

Symplectic Geometry · Mathematics 2012-10-02 Li-Sheng Tseng , Shing-Tung Yau

We study a local-to-global inequality for spectral invariants of Hamiltonians whose supports have a ``large enough" tubular neighborhood on semipositive symplectic manifolds. In particular, we present the first examples of such an…

Symplectic Geometry · Mathematics 2022-12-06 Lev Buhovsky , Shira Tanny

We provide a construction of equivariant Lagrangian Floer homology $HF_G(L_0, L_1)$, for a compact Lie group $G$ acting on a symplectic manifold $M$ in a Hamiltonian fashion, and a pair of $G$-Lagrangian submanifolds $L_0, L_1 \subset M$.…

Symplectic Geometry · Mathematics 2024-03-14 Guillem Cazassus

On one side, from the properties of Floer cohomology, invariant associated to a symplectic manifold, we define and study a notion of symplectic hyperbolicity and a symplectic capacity measuring it. On the other side, the usual notions of…

Symplectic Geometry · Mathematics 2007-05-23 Anne-Laure Biolley

Building on the algebraic framework developed by Hendricks, Manolescu, and Zemke, we introduce and study a set of Floer-theoretic invariants aimed at detecting corks. Our invariants obstruct the extension of a given involution over any…

Geometric Topology · Mathematics 2024-08-27 Irving Dai , Matthew Hedden , Abhishek Mallick

We construct Hamiltonian Floer complexes associated to continuous, and even lower semi-continuous, time dependent exhaustion functions on geometrically bounded symplectic manifolds. We further construct functorial continuation maps…

Symplectic Geometry · Mathematics 2023-06-21 Yoel Groman

We study the Euler-Lagrange cohomology and explore the symplectic or multisymplectic geometry and their preserving properties in classical mechanism and classical field theory in Lagrangian and Hamiltonian formalism in each case…

High Energy Physics - Theory · Physics 2007-05-23 H. Y. Guo , Y. Q. Li , K. Wu , S. K. Wang

Let $M$ be a compact, connected symplectic manifold with a Hamiltonian action of a compact $n$-dimensional torus $G=T^n$. Suppose that $\sigma$ is an anti-symplectic involution compatible with the $G$-action. The real locus of $M$ is $X$,…

Symplectic Geometry · Mathematics 2007-05-23 Daniel Biss , Victor W. Guillemin , Tara S. Holm

We show that Floer cohomology of an immersed Lagrangian brane is invariant under smoothing of a self-intersection point if the quantum valuation of the weakly bounding cochain vanishes and the Lagrangian has dimension at least two. The…

Symplectic Geometry · Mathematics 2025-12-25 Joseph Palmer , Chris Woodward

Given a closed, oriented surface, possibly with boundary, and a mapping class, we obtain sharp lower bounds on the number of fixed points of a surface symplectomorphism (i.e. area-preserving map) in the given mapping class, both with and…

Symplectic Geometry · Mathematics 2023-08-02 Andrew Cotton-Clay

We use monopole Floer homology for sutured manifolds to construct invariants of Legendrian knots in a contact 3-manifold. These invariants assign to a knot K in Y elements of the monopole knot homology KHM(-Y,K), and they strongly resemble…

Symplectic Geometry · Mathematics 2015-06-10 Steven Sivek

We construct a variant of Floer homology groups and prove a gluing formula for a variant of Donaldson invariants. As a corollary, the variant of Donaldson invariants is non-trivial for connected sums of 4-manifolds which satisfy a condition…

Geometric Topology · Mathematics 2010-08-27 Hirofumi Sasahira

We extend the Cohen-Jones-Segal construction of stable homotopy types associated to flow categories of Morse-Smale functions $f$ to the setting where $f$ is equivariant under a finite group action and is Morse but no longer Morse-Smale.…

Symplectic Geometry · Mathematics 2024-05-29 Semon Rezchikov

Floer homology is a good example of homological invariants living in the infinite dimension. We suggest a way to construct this kind of invariants using only soft essentially finite-dimensional tools; no hard analysis or PDE is involved.…

Differential Geometry · Mathematics 2020-01-16 Andrei Agrachev