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The goal of these notes is to give a short introduction to Fukaya categories and some of their applications. The first half of the text is devoted to a brief review of Lagrangian Floer (co)homology and product structures. Then we introduce…

Symplectic Geometry · Mathematics 2013-01-30 Denis Auroux

Given a punctured Riemann surface with a pair-of-pants decomposition, we compute its wrapped Fukaya category in a suitable model by reconstructing it from those of various pairs of pants. The pieces are glued together in the sense that the…

Symplectic Geometry · Mathematics 2016-08-17 Heather Lee

We establish the continuous functoriality of wrapped Fukaya categories with respect to Liouville automorphisms, yielding a way to probe the homotopy type of the automorphism group of a Liouville sector. These methods prove Liouville and…

Symplectic Geometry · Mathematics 2024-07-18 Yong-Geun Oh , Hiro Lee Tanaka

We prove that homological mirror symmetry for very affine hypersurfaces respects certain natural symplectic operations (as functors between partially wrapped Fukaya categories), verifying conjectures of Auroux. These conjectures concern…

Symplectic Geometry · Mathematics 2025-01-03 Benjamin Gammage , Maxim Jeffs

Getzler-Jones-Petrack introduced $A_\infty$ structures on the equivariant complex for manifold $M$ with smooth $\mathbb{S}^1$ action, motivated by geometry of loop spaces. Applying Witten's deformation by Morse functions followed by…

Differential Geometry · Mathematics 2019-01-29 Ziming Nikolas Ma

We give an introduction to partially wrapped Fukaya categories of surfaces with orbifold singularities. Dissecting an orbifold surface $\mathbf S$ into polygons, certain dissections give rise to formal generators, inducing a triangulated…

Representation Theory · Mathematics 2026-02-20 Severin Barmeier , Zhengfang Wang

Fukaya categories are deep and rich invariants of symplectic manifolds which are notoriously difficult to compute explicitly. In the case of surfaces, however, the situation is simple, combinatorial,and is very well understood (at least by…

Symplectic Geometry · Mathematics 2025-10-14 Chris Grossack

We study homological mirror symmetry for toric varieties, exploring the relationship between various Fukaya-Seidel categories which have been employed for constructing the mirror to a toric variety. In particular, we realize tropical…

Symplectic Geometry · Mathematics 2022-04-04 Andrew Hanlon , Jeff Hicks

In this paper, we study the Floer theory of equivariant Lagrangian correspondences and apply it to derive precise relations between the disc potential of an invariant Lagrangian submanifold and that of its quotient, thereby addressing a…

Symplectic Geometry · Mathematics 2025-07-22 Siu-Cheong Lau , Nai-Chung Conan Leung , Yan-Lung Leon Li

For a symplectic manifold satisfying some topological condition,we define a special class of modules over the deformation quantization algebra. For any two such modules we construct an infinity local system of morphisms. We construct such…

K-Theory and Homology · Mathematics 2019-05-17 Boris Tsygan

We study Homological Mirror Symmetry (HMS) for $A_n$-resolutions from the SYZ viewpoint. Let $X\to\bC^2/\bZ_{n+1}$ be the crepant resolution of the $A_n$-singularity. The mirror of $X$ is given by a smoothing $\check{X}$ of…

Symplectic Geometry · Mathematics 2014-02-19 Kwokwai Chan

Suppose one has found a non-empty sub-category $\mathcal{A}$ of the Fukaya category of a compact Calabi-Yau manifold $X$ which is homologically smooth in the sense of non-commutative geometry, a condition intrinsic to $\mathcal{A}$. Then,…

Symplectic Geometry · Mathematics 2019-11-18 Sheel Ganatra

Let $G$ be a compact Lie group and $\mathbf{k}$ be a field of characteristic $p \geq 0$ such that $H^* (G)$ does not have $p$-torsion. We show that a free Lagrangian orbit of a Hamiltonian $G$-action on a compact, monotone, symplectic…

Symplectic Geometry · Mathematics 2018-08-20 Jonathan David Evans , Yanki Lekili

We describe the formulation of Fukaya categories of symplectic manifolds with $B$-fields. In addition, we give a formula for how the $A_\infty$ structure maps change as we deform an object by a Lagrangian isotopy.

Symplectic Geometry · Mathematics 2025-10-31 Haniya Azam , Catherine Cannizzo , Heather Lee , Chiu-Chu Melissa Liu

We develop a purely categorical theory of action filtrations and their associated growth invariants. When specialized to categories of geometric interest, such as the wrapped Fukaya category of a Weinstein manifold, and the bounded derived…

Symplectic Geometry · Mathematics 2023-05-22 Laurent Côté , Yusuf Barış Kartal

The LS-category of a topological space is a numerical homotopy invariant, introduced originally in a course on the global calculus of variations by Lyusternik and Schnirelmann, to estimate the number of critical points of a smooth function.…

Geometric Topology · Mathematics 2017-12-20 Marine Fontaine , James Montaldi

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 work in the setting of Calabi-Yau mirror symmetry. We establish conditions under which Kontsevich's homological mirror symmetry (which relates the derived Fukaya category to the derived category of coherent sheaves on the mirror) implies…

Symplectic Geometry · Mathematics 2015-10-16 Sheel Ganatra , Timothy Perutz , Nick Sheridan

Let $L$ be a monotone Lagrangian torus inside a compact symplectic manifold $X$, with superpotential $W_L$. We show that a geometrically-defined closed-open map induces a decomposition of the quantum cohomology $\operatorname{QH}^*(X)$ into…

Symplectic Geometry · Mathematics 2025-02-14 Jack Smith

We use Lagrangian torus fibrations on the mirror $X$ of a toric Calabi-Yau threefold $\check X$ to construct Lagrangian sections and various Lagrangian spheres on $X$. We then propose an explicit correspondence between the sections and line…

Symplectic Geometry · Mathematics 2023-02-13 Mark Gross , Diego Matessi
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