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We consider the Fukaya category associated to a basis of vanishing cycles in a Lefschetz fibration. We show that each element of the Floer cohomology of the monodromy around infinity gives rise to a natural transformation from the Serre…

Symplectic Geometry · Mathematics 2017-06-05 Paul Seidel

We compute the Fukaya category of the symplectic blowup of a compact rational symplectic manifold at a point in the following sense: Suppose a collection of Lagrangian branes satisfy Abouzaid's criterion for split-generation of a…

Symplectic Geometry · Mathematics 2026-01-21 Sushmita Venugopalan , Chris T. Woodward , Guangbo Xu

For the stopped Weinstein sector associated with any fanifold recently introduced by Gammage--Shende, we construct a Weinstein sectorial cover which allows us to describe homological mirror symmetry over the fanifold as an isomorphism of…

Symplectic Geometry · Mathematics 2026-02-09 Hayato Morimura

We describe the (bigraded) Hochschild cohomology of graded gentle algebras along with the Gerstenhaber bracket and cup product. In particular, this yields a description of the Hochschild cohomology of partially wrapped Fukaya categories of…

Representation Theory · Mathematics 2026-01-12 Sebastian Opper

We construct an unwrapped Floer theory for bundles of Liouville sectors. In particular, we construct a compatible collection of unwrapped Fukaya categories of fibers of a Liouville bundle, and prove that the two natural constructions of…

Symplectic Geometry · Mathematics 2020-10-06 Yong-Geun Oh , Hiro Lee Tanaka

We prove that the Fukaya-Seidel categories of a certain family of Lefschetz fibrations on $\mathbb{C}^2$ are equivalent to the perfect derived categories of Auslander algebras of Dynkin type $\mathbb{A}$. We give an explicit equivalence…

Symplectic Geometry · Mathematics 2026-02-26 Ilaria Di Dedda

We show that the derived wrapped Fukaya category $D^\pi\mathcal{W}(X_{Q}^{d+1})$, the derived compact Fukaya category $D^\pi\mathcal{F}(X_{Q}^{d+1})$ and the cocore disks $L_{Q}$ of the plumbing space $X_{Q}^{d+1}$ form a Calabi--Yau…

Symplectic Geometry · Mathematics 2023-06-16 Hanwool Bae , Wonbo Jeong , Jongmyeong Kim

To a symplectic Lefschetz pencil on a monotone symplectic manifold, we associate an algebraic structure, which is a pencil of categories in the sense of noncommutative geometry. One fibre of this "noncommutative pencil" is related to the…

Symplectic Geometry · Mathematics 2025-11-06 Paul Seidel

We compare different constructions of mirrors of del Pezzo surfaces, focusing on degree $d \leq 3$. In particular, we extract Lefschetz fibrations, with associated exceptional collections, from the mirrors obtained via the Hori-Vafa and…

Algebraic Geometry · Mathematics 2025-06-30 Giulia Gugiatti , Franco Rota

We develop a categorical framework for simple homotopy theory in Fukaya categories, based on the fundamental group of the ambient symplectic manifold. When the first Chern class vanishes, we show that any isomorphism in the Fukaya category…

Symplectic Geometry · Mathematics 2025-09-30 Yonghwan Kim

We describe a construction of the Fukaya category of an exact symplectic Lefschetz fibration, together with its closed-open string map.

Symplectic Geometry · Mathematics 2018-10-30 Paul Seidel

It follows from the work of Burban and Drozd arXiv:0905.1231 that for nodal curves $C$, the derived category of modules over the Auslander order $\mathcal{A}_C$ provides a categorical (smooth and proper) resolution of the category of…

Symplectic Geometry · Mathematics 2018-07-04 Yanki Lekili , Alexander Polishchuk

We develop a local-to-global formalism for constructing Calabi-Yau structures for global sections of constructible sheaves or cosheaves of categories. The required data - an isomorphism of the sheafified Hochschild homology with the…

Algebraic Geometry · Mathematics 2024-05-16 Vivek Shende , Alex Takeda

We use Lefschetz pencil methods to derive structural results about Fukaya categories of Calabi-Yau hypersurfaces; in particular, concerning their dependence on the Novikov parameter. Warning to the reader: the arguments in this paper cite…

Symplectic Geometry · Mathematics 2021-06-03 Paul Seidel

Let $X$ be a compact toric variety. The quantum cohomology of $X$ decomposes as a direct sum, and associated to each summand $Q$ is a toric fibre $L_Q$ with rank $1$ local system. By building an explicit twisted-complex-like object, we show…

Symplectic Geometry · Mathematics 2023-08-10 Jack Smith

We develop an equivariant Lagrangian Floer theory for Liouville sectors that have symmetry of a Lie group $G$. Moreover, for Liouville manifolds with $G$-symmetry, we develop a correspondence theory to relate the equivariant Lagrangian…

Symplectic Geometry · Mathematics 2026-05-13 Dongwook Choa , Jiawei Hu , Siu-Cheong Lau , Yan-Lung Leon Li

Given an arbitrary graph $\Gamma$ and non-negative integers $g_v$ for each vertex $v$ of $\Gamma$, let $X_\Gamma$ be the Weinstein $4$-manifold obtained by plumbing copies of $T^*\Sigma_v$ according to this graph, where $\Sigma_v$ is a…

Symplectic Geometry · Mathematics 2018-10-15 Tolga Etgü , Yanki Lekili

We construct a Lagrangian in the cotangent bundle of a 3-torus whose projection to the fiber is a neighborhood of a tropical curve with a single 4-valent vertex. This Lagrangian has an isolated conical singular point, and its smooth locus…

Symplectic Geometry · Mathematics 2025-11-18 Sebastian Haney

This is the first of a series of papers in preparation on the Fukaya-type $A_\infty$ category generated by tame Legendrian submanifolds, called the Legendrian contact instanton Fukaya category (abbreviated as the Legendrian CI Fukaya…

Symplectic Geometry · Mathematics 2024-11-22 Yong-Geun Oh

We prove that a positive allowable Lefschetz fibration, PALF in short, admits a structure of exact Lefschetz fibration in the sense of Seidel \cite{Se08}. If the two-fold first Chern class of the total space is zero, we obtain the…

Symplectic Geometry · Mathematics 2016-07-11 Satoshi Sugiyama