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We establish an infinitesimal version of fragility for squared Dehn twists around even dimensional Lagrangian spheres. The precise formulation involves twisting the Fukaya category by a closed two-form or bulk deforming it by a…

Symplectic Geometry · Mathematics 2021-04-08 Kyler Siegel

We study the symplectic topology of some finite algebraic quotients of the An Milnor fibre which are diffeomorphic to the rational homology balls that appear in Fintushel and Stern's rational blowdown construction. We prove that these…

Symplectic Geometry · Mathematics 2012-10-03 Yanki Lekili , Maksim Maydanskiy

For a closed symplectic manifold $(M,\omega)$, a compatible almost complex structure $J$, a 1-periodic time dependent symplectic vector field $Z$ and a homotopy class of closed curves $\gamma$ we define a Floer complex based on 1-periodic…

Symplectic Geometry · Mathematics 2007-05-23 Dan Burghelea , Stefan Haller

We give a definition of Seidel's `relative Fukaya category', for a smooth complex projective variety, under a semipositivity assumption. We use the Cieliebak--Mohnke approach to transversality via stabilizing divisors. Two features of our…

Symplectic Geometry · Mathematics 2023-04-04 Timothy Perutz , Nick Sheridan

This article studies the symplectic cohomology of affine algebraic surfaces that admit a compactification by a normal crossings anticanonical divisor. Using a toroidal structure near the compactification divisor, we describe the complex…

Symplectic Geometry · Mathematics 2019-12-11 James Pascaleff

Let $X$ be a closed symplectic manifold equipped a Lagrangian torus fibration over a base $Q$. A construction first considered by Kontsevich and Soibelman produces from this data a rigid analytic space $Y$, which can be considered as a…

Symplectic Geometry · Mathematics 2021-01-11 Mohammed Abouzaid

We prove several combinatorial results on path algebras over discrete structures related to directed graphs. These results are motivated by Morse theory on a manifold with boundary and, more generally, by Floer theory on a configuration…

Geometric Topology · Mathematics 2013-01-01 Jonathan M. Bloom

We show: the Floer homology over the Novikov ring of (nonexact!) rational Lagrangians in an (nonexact!) integral symplectic manifold can be computed in terms of exact Lagrangians in an exact filling of the prequantization bundle. As a…

Symplectic Geometry · Mathematics 2026-02-12 Tatsuki Kuwagaki , Adrian Petr , Vivek Shende

It is well known that "Fukaya category" is in fact an $A_{\infty}$-pre-category in sense of Kontsevich and Soibelman \cite{KS}. The reason is that in general the morphism spaces are defined only for transversal pairs of Lagrangians, and…

Category Theory · Mathematics 2025-02-07 Alexander I. Efimov

From the cohomological point of view the symplectomorphism group $Sympl (M)$ of a symplectic manifold is `` tamer'' than the diffeomorphism group. The existence of invariant polynomials in the Lie algebra $\frak {sympl }(M)$, the symplectic…

dg-ga · Mathematics 2008-02-03 Alexander G. Reznikov

Reasoning about weak higher categorical structures constitutes a challenging task, even to the experts. One principal reason is that the language of set theory is not invariant under the weaker notions of equivalence at play, such as…

Category Theory · Mathematics 2022-03-01 Jonathan Weinberger

In mirror symmetry, symplectic Landau-Ginzburg models are mirror to a large class of examples, in particular to Fano varieties and hypersurfaces of many Calabi-Yau and Fano varieties. When studying their Fukaya categories on the A-model in…

Symplectic Geometry · Mathematics 2025-10-29 Haniya Azam , Catherine Cannizzo , Heather Lee , Chiu-Chu Melissa Liu

This is a research monograph on symplectic cohomology (disguised as an advanced graduate textbook), which provides a construction of this version of Hamiltonian Floer cohomology for cotangent bundles of closed manifolds. The focus is on the…

Symplectic Geometry · Mathematics 2014-01-28 Mohammed Abouzaid

Given a symplectic cohomology class of degree 1, we define the notion of an equivariant Lagrangian submanifold. The Floer cohomology of equivariant Lagrangian submanifolds has a natural endomorphism, which induces a grading by generalized…

Symplectic Geometry · Mathematics 2012-10-24 Paul Seidel , Jake P. Solomon

We give a complete description of the A$_\infty$ deformation theory of partially wrapped Fukaya categories of graded surfaces. We show that any abstract A$_\infty$ deformation is "geometric", namely it is equivalent to the partially wrapped…

Symplectic Geometry · Mathematics 2025-12-19 Severin Barmeier , Sibylle Schroll , Zhengfang Wang

We define a class of non-compact Fano toric manifolds, called admissible toric manifolds, for which Floer theory and quantum cohomology are defined. The class includes Fano toric negative line bundles, and it allows blow-ups along fixed…

Symplectic Geometry · Mathematics 2023-12-29 Alexander F. Ritter

We construct a stable infinity category with objects flow categories and morphisms flow bimodules; our construction has many flavors, related to a choice of bordism theory, and we discuss in particular framed bordism and the bordism theory…

Symplectic Geometry · Mathematics 2024-08-01 Mohammed Abouzaid , Andrew J. Blumberg

In various situations in Floer theory, one extracts homological invariants from "Morse-Bott" data in which the "critical set" is a union of manifolds, and the moduli spaces of "flow lines" have evaluation maps taking values in the critical…

Symplectic Geometry · Mathematics 2020-07-29 Michael Hutchings , Jo Nelson

In this survey paper, we will collate various different ideas and thoughts regarding equivariant operations on quantum cohomology (and some in more general Floer theory) for a symplectic manifold. We will discuss a general notion of…

Symplectic Geometry · Mathematics 2024-09-30 Nicholas Wilkins

We introduce the critical Weinstein infinity-category -- the result of stabilizing the category of Weinstein sectors and inverting subcritical morphisms -- and for every finite collection P of integers, construct a P-flexibilization…

Symplectic Geometry · Mathematics 2025-12-05 Oleg Lazarev , Zachary Sylvan , Hiro Lee Tanaka