Erkao Bao, Ko Honda
Using a simplified version of Kuranishi perturbation theory that we call semi-global Kuranishi structures, we give a definition of the equivariant Lagrangian Floer cohomology of a pair of Lagrangian submanifolds that are fixed under a finite symplectic group action and satisfy certain simplifying assumptions.
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Properties of Gromov-Witten invariants defined via global Kuranishi charts
本文通过全局Kuranishi图表定义了通用辛流形的引力后裔和equivariant Gromov-Witten不变量，并证明其满足Kontsevich和Manin的公理，同时推导了Hamiltonian流形的显式公式。
A Kuranishi space is a topological space with a Kuranishi structure, defined by Fukaya and Ono. Kuranishi structures occur naturally on moduli spaces of J-holomorphic curves in symplectic geometry. Let Y be an orbifold and R a commutative ring or Q-algebra. We define two kinds of Kuranishi homology KH_*(Y;R). The chain complex KC_*(Y;R) defining KH_*(Y;R) is spanned over R by [X,f,G], for X a compact oriented Kuranishi space with corners, f : X --> Y smooth, and G "gauge-fixing data" which makes Aut(X,f,G) finite. Our main result is that these are isomorphic to singular homology. We define Poi…
In this paper we give detailed construction of $G$-equivariant Kuranishi chart of moduli spaces of pseudo-holomorphic curves to a symplectic manifold with $G$-action, for an arbitrary compact Lie group $G$. The proof is based on the deformation theory of {\it unstable} marked curves using the language of Lie groupoid (which is {\it not} necessary etale) and the Riemannnian center of mass technique. This proof is actually similar to [FOn,Sections 13 and 15] except the usage of the language of Lie groupoid makes the argument more transparent. This version correct some errors of the previous vers…
Equivariant Floer homology is isomorphic to reduced Floer homology
本文通过构造Novikov环上的量子模型改进等变拉格朗日Floer同调，并证明当矩映射零水平集上的群作用自由时，等变Floer同调与Marsden-Weinstein约化的Floer同调同构，从而证实Cazassus猜想。
In this paper we study the Lagrangian Floer theory over $\Z$ or $\Z_2$. Under an appropriate assumption on ambient symplectic manifold, we show that the whole story of Lagrangian Floer theory in \cite{fooo-book} can be developed over $\Z_2$ coefficients, and over $\Z$ coefficients when Lagrangian submanifolds are relatively spin. The main technical tools used for the construction are the notion of the sheaf of groups, and stratification and compatibility of the normal cones applied to the Kuranishi structure of the moduli space of pseudo-holomorphic discs.
We introduce a category of Kuranishi presentations, whose objects are a variant of the Kuranishi structures introduced by Fukaya and Ono, and which can be seen as a refinement of the version studied by Pardon. We then formulate the notion of virtual chains categorically as a natural transformation between two functors from this category to the category of chain complexes; we call such a datum 'a theory of virtual counts'. To show that this definition carries non-trivial content, we then construct a multicategory whose objects are Kuranishi flow categories, and show that a theory of virtual cou…
This is an expository article on the theory of Kuranishi structure and is based on a series of pdf files we uploaded for the discussion of the google group named `Kuranishi' (with its administrator H. Hofer). There we replied to several questions concerning Kuranishi structure raised by K. Wehrheim. At this stage we submit this article to the e-print arXiv, all the questions or objections asked in that google group were answered, supplemented or confuted by us. We first discuss the abstract theory of Kuranishi structure and virtual fundamental chain/cycle. This part can be read independently f…
The Floer cohomology of a symplectic automorphism and that of its square are related by the pair-of-pants product. For exact symplectic automorphisms, we introduce an equivariant version of that product, and use it to prove a Smith-type inequality of ranks between Floer cohomology groups. Under additional topological assumptions, the same inequality was previously proved by Hendricks, using a different strategy.
We correct a mistake regarding almost complex structures on Hilbert schemes of points in surfaces in arXiv:1510.02449. The error does not affect the main results of the paper, and only affects the proofs of invariance of equivariant symplectic Khovanov homology and reduced symplectic Khovanov homology. We give an alternate proof of the invariance of equivariant symplectic Khovanov homology.
We explain how to adapt the methods of Abouzaid-McLean-Smith to the setting of Hamiltonian Floer theory. We develop a language around equivariant ``$\langle k \rangle$-manifolds'', which are a type of manifold-with-corners that suffices to capture the combinatorics of Floer-theoretic constructions. We describe some geometry which allows us to straightforwardly adapt Lashofs's stable equivariant smoothing theory and Bau-Xu's theory of FOP-perturbations to $\langle k \rangle$-manifolds. This allows us to compatibly smooth global Kuranishi charts on all Hamiltonian Floer trajectories at once, in …
We construct connections on $S^1$-equivariant Hamiltonian Floer cohomology, which differentiate with respect to certain formal parameters.
Inspired by Kronheimer and Mrowka's approach to monopole Floer homology, we develop a model for $\mathbb{Z}/2$-equivariant symplectic Floer theory using equivariant almost complex structures, which admits a localization map to a twisted version of Floer cohomology in the invariant set. We then present applications to Steenrod operations on Lagrangian Floer cohomology, and to the Heegaard Floer homology of double covers of three-manifolds.
We define the $S^1$-equivariant Rabinowitz-Floer homology of a bounding contact hypersurface $Σ$ in an exact symplectic manifold, and show by a geometric argument that it vanishes if $Σ$ is displaceable. In the appendix we describe an approach to transversality for Floer homologies for which the moduli space $\widehat M_J$ of all gradient flow lines is compact for some almost complex structure $J$. This approach uses a large set of perturbations, namely vector fields on the loop space, and selects from the possibly non-compact perturbed moduli spaces a part near $\widehat M_J$ that turns out t…
Let $(X,ω)$ be a symplectic manifold, $J$ be an $ω$-tame almost complex structure, and $L$ be a Lagrangian submanifold. The stable compactification of the moduli space of parametrized $J$-holomorphic curves in $X$ with boundary in $L$ (with prescribed topological data) is compact and Hausdorff in Gromov's $C^\infty$-topology. We construct a Kuranishi structure with corners in the sense of Fukaya and Ono. This Kuranishi structure is orientable if $L$ is spin. In the special case where the expected dimension of the moduli space is zero, and there is an $S^1$ action on the pair $(X,L)$ which pres…
Equivariant Lagrangian Floer homology via multiplicative flow trees
本文通过在Floer复形上构造并利用$A_\infty$-模结构，提供了等变拉格朗日Floer同调群的构造方法。
Equivariant Floer cohomology for contactomorphisms of quotient spaces
本文研究接触流形商空间的可序性，通过等变接触Floer上同调理论发展非线性Maslov指数，并利用映射锥检测与判别点的交叉，以处理定义映射锥的非规范性。
A Kuranishi space is a topological space with a Kuranishi structure, defined by Fukaya and Ono. Kuranishi structures occur naturally on moduli spaces of J-holomorphic curves in symplectic geometry. This paper is a brief introduction to the author's book arXiv:0707.3572. Let Y be an orbifold and R a Q-algebra. We define the Kuranishi homology KH_*(Y;R) of Y with coefficients in R. The chain complex KC_*(Y;R) defining KH_*(Y;R) is spanned over R by [X,f,G], for X a compact oriented Kuranishi space with corners, f : X --> Y smooth, and G "gauge-fixing data" which makes Aut(X,f,G) finite. Our main…
Equivariant Partially Wrapped Fukaya Categories on Liouville Sectors
本文研究了具有Lie群对称性的Liouville扇形的等变Lagrangian Floer理论，并探讨了其商空间的Lagrangian Floer同调之间的对应关系，证明了等变对应在上同调上的同构性。
The notion of linear K-system is introduced by the present authors as an abstract model arising from the structure of compactified moduli spaces of solutions to Floer's equation in the book [FOOO14]. The purpose of the present article is to provide a geometric realization of the linear K-system associated with solutions to Floer's equation in the Morse-Bott setting. Immediate consequences (when combined with the abstract theory from [FOOO14]) are construction of Floer cohomology for periodic Hamiltonian system on general compact symplectic manifold without any restriction, and construction of …
Integral Hamiltonian Floer theory: Foundations
建立紧辛流形上整数系数的哈密顿Floer理论，定义Floer复形、延续映射、PSS同构和配对积，并发展Z/p-等变Floer理论及量子Steenrod运算。
Moment Lagrangian correspondences are unobstructed after bulk deformation
该研究在假设伪全纯圆盘模空间存在特定等变Kuranishi结构与相容等变CF-扰动的条件下，证明了矩映射自由零水平集上辛约化映射诱导的拉格朗日对应经体形变后无障碍，推进了辛几何相关理论研究。
For G a Lie group acting on a symplectic manifold $(M,ω)$ preserving a pair of Lagrangians $L_0$, $L_1$, under certain hypotheses not including equivariant transversality we construct a G-equivariant Floer cohomology of $L_0$ and $L_1$.
Equivariant Lagrangian Floer theory on compact toric manifolds
本文在带子环面作用的紧致辛环面流形上建立等变拉格朗日弗洛尔理论，将非零等变弗洛尔上同调的拉格朗日环面纤维集合等同于刚性解析空间并给出其热带化定位，同时证明此类子流形在等变哈密顿微分同胚下不可移位。
The objective of this paper is to clarify the relationships between the quantum D-module and equivariant Floer theory. Equivariant Floer theory was introduced by Givental in his paper ``Homological Geometry''. He conjectured that the quantum D-module of a symplectic manifold is isomorphic to the equivariant Floer cohomology for the universal cover of the free loop space. First, motivated by the work of Guest, we formulate the notion of ``abstract quantum D-module''which generalizes the D-module defined by the small quantum cohomology algebra. Second, we define the equivariant Floer cohomology …
In the first part of the present series of papers, we studied the moduli spaces of holomorphic discs and strips into an open symplectic manifold, isomorphic to the complement of a smooth divisor in a closed symplectic manifold. In particular, we introduced a compactification of this moduli space, which is called the RGW compactification. The goal of this paper is to show that the RGW compactifications admit Kuranishi structures. This result provides the crucial ingredient for the main construction of this series of papers: Floer homology for monotone Lagrangians in a smooth divisor complement.
The aim of this article is to apply a Floer theory to study symmetric periodic Reeb orbits. We define positive equivariant wrapped Floer homology using a (anti-)symplectic involution on a Liouville domain and investigate its algebraic properties. By a careful analysis of index iterations, we obtain a non-trivial lower bound on the minimal number of geometrically distinct symmetric periodic Reeb orbits on a certain class of real contact manifolds. This includes non-degenerate real dynamically convex starshaped hypersurfaces in $\mathbb{R}^{2n}$ which are invariant under complex conjugation. As …
Seidel-Smith and Hendricks used equivariant Floer cohomology to define some spectral sequences from symplectic Khovanov homology and Heegaard Floer homology. These spectral sequences give rise to Smith-type inequalities. Similar-looking spectral sequences have been defined by Lee, Bar-Natan, Ozsváth-Szabó, Lipshitz-Treumann, Szabó, Sarkar-Seed-Szabó, and others. In this paper we give another construction of equivariant Floer cohomology with respect to a finite group action and use it to prove some invariance properties of these spectral sequences; prove that some of these spectral sequences ag…
We construct shift operators on equivariant symplectic cohomology which generalise the shift operators on equivariant quantum cohomology in algebraic geometry. That is, given a Hamiltonian action of the torus $T$, we assign to a cocharacter of $T$ an endomorphism of $(S^1 \times T)$-equivariant Floer cohomology based on the equivariant Floer Seidel map. We prove the shift operator commutes with a connection. This connection is a multivariate version of Seidel's $q$-connection on $S^1$-equivariant Floer cohomology and generalises the Dubrovin connection on equivariant quantum cohomology. We pro…
Quantum cohomology and Floer invariants of semiprojective toric manifolds
该研究利用Floer理论分析带多交换$\mathbb{C}^*$-作用的辛流形不变量，证明量子上同调与哈密顿Floer上同调的滤过关系，拓展至等变情形并给出半射影环面流形在Fano、CY情形下两类上同调的显式表示。
Filtrations on equivariant quantum cohomology and Hilbert-Poincaré series
本文证明Floer理论在具C*作用的辛流形的等变量子上同调上诱导理想滤过，并由此在普通上同调上生成依赖Floer理论的Hilbert-Poincaré多项式，同时发展了三种等变Floer上同调滤过的结构性质，给出了Calabi-Yau与Fano设定下等变辛上同调的显式表示。
Building on Seidel-Solomon's fundamental work, we define the notion of a $\mathfrak{g}$-equivariant Lagrangian brane in an exact symplectic manifold $M$ where $\mathfrak{g} \subset SH^1(M)$ is a sub-Lie algebra of the symplectic cohomology of $M$. When $M$ is a (symplectic) mirror to an (algebraic) homogeneous space $G/P$, homological mirror symmetry predicts that there is an embedding of $\mathfrak{g}$ in $SH^1(M)$. This allows us to study a mirror theory to classical constructions of Borel-Weil and Bott. We give explicit computations recovering all finite dimensional irreducible representati…
Let $p \geq 2$ be a prime, and $\mathbb{F}_p$ be the field with $p$ elements. Extending a result of Seidel for $p=2,$ we construct an isomorphism between the Floer cohomology of an exact or Hamiltonian symplectomorphism $ϕ,$ with $\mathbb{F}_p$ coefficients, and the $\mathbb{Z}/p \mathbb{Z}$-equivariant Tate Floer cohomology of its $p$-th power $ϕ^p.$ The construction involves a Kaledin-type quasi-Frobenius map, as well as a $\mathbb{Z}/p \mathbb{Z}$-equivariant pants product: an equivariant operation with $p$ inputs and $1$ output. Our method of proof involves a spectral sequence for the acti…
Equivariant Floer homotopy via Morse-Bott theory
本研究将Cohen-Jones-Segal构造推广至Morse-Bott情形，定义流范畴Morse-Bott类似物的标架并关联稳定同伦型，进而在Floer理论中构造球谱系数辛上同调的圆周等变模型，证明余切丛零截面情形下的等变Viterbo同构定理。
We construct finite group actions on Lagrangian Floer theory when symplectic manifolds have finite group actions and Lagrangian submanifolds have induced group actions. We first define finite group actions on Novikov-Morse theory. We introduce the notion of a {\em spin profile} as an obstruction class of extending the group action on Lagrangian submanifold to the one on its spin structure, which is a group cohomology class in $H^2(G;\Z/2)$. For a class of Lagrangian submanifolds which have the same spin profiles, we define a finite group action on their Fukaya category. In consequence, we obta…
Cyclic homology, $S^1$-equivariant Floer cohomology, and Calabi-Yau structures
本文构造Fukaya范畴循环同调到$S^1$-等变上同调的循环开-闭映射，用以建立Calabi-Yau结构并证明非交换Hodge-de Rham退化。
The Seidel maps are two maps associated to a Hamiltonian circle action on a convex symplectic manifold, one on Floer cohomology and one on quantum cohomology. We extend their definitions to $S^1$-equivariant Floer cohomology and $S^1$-equivariant quantum cohomology based on a construction of Maulik and Okounkov. The $S^1$-action used to construct $S^1$-equivariant Floer cohomology changes after applying the equivariant Seidel map (a similar phenomenon occurs for $S^1$-equivariant quantum cohomology). We show the equivariant Seidel map on $S^1$-equivariant quantum cohomology does not commute wi…
Equivariant Lagrangian displacements
本文通过发展Borel等变量子上同调，证明了标准辛向量空间中某些单调拉格朗日子流形不能被与对径映射交换的哈密顿同痕位移，并揭示了Floer–Euler类在等变微分中的作用。
A survey of equivariant operations on quantum cohomology for symplectic manifolds
本文综述了辛流形量子上同调上的等变操作，探讨了有限群相关的等变量子操作概念、性质、计算及其与 Floer 理论不变量的联系，并概述了向紧致群（如 $S^1$）扩展的初步工作。
Recovering generalized homology from Floer homology: the complex oriented case
本文通过完备Tate上同调将滤过圆等变谱与复定向上同调理论关联，证明对Liouville流形仅依赖稳定同伦型，并利用Morava K-理论及复K-理论计算恢复整数同调与复K-理论。
Seiberg-Witten Floer Spectra and Contact Structures
本文利用Seiberg-Witten Floer谱的上同伦集为带接触结构的有理同调3-球面定义新不变量，证明其自然恢复已知接触元素，并引入等变版本以处理有限覆盖情形。
Equivariant Lagrangian Floer homology via cotangent bundles of $EG_N$
该研究利用EG近似的余切丛辛同伦商，结合拼贴理论与望远镜构造，定义了紧李群作用下的等变拉格朗日Floer同调，证明其性质并构造Kirwan态射，为Atiyah-Floer猜想提供等变辛几何侧对应。
$T$-equivariant disc potential and SYZ mirror construction
该研究发展了$G$-等变拉格朗日弗洛尔理论，构造了$G$-等变圆盘势与莫尔斯模型，应用于半法诺托里流形时恢复了Givental的镜像，并研究了奇异SYZ纤维的$\bS^1$-等变弗洛尔理论及圆盘势计算。
BV bialgebra structures in Floer theory and string topology
本文从模空间紧化拓扑导出BV双代数结构，并构造于约化辛同调、Rabinowitz Floer同调及非等变弦拓扑，同时展示等变情形下Lie双代数结构的形式推论。
We survey the different versions of Floer homology that can be associated to three-manifolds. We also discuss their applications, particularly to questions about surgery, homology cobordism, and four-manifolds with boundary. We then describe Floer stable homotopy types, the related Pin(2)-equivariant Seiberg-Witten Floer homology, and its application to the triangulation conjecture.
Equivariant Lagrangian correspondence and a conjecture of Teleman
本文通过将Fukaya的$A_\infty$三模构造推广到Borel空间，研究等变拉格朗日对应的Floer理论，证明等变导出Fukaya范畴与辛商空间导出Fukaya范畴拟同构，并利用等变阻碍导致的量子修正解决Teleman猜想。
In a previous paper, the author introduced a Floer-theoretic torsion invariant I_F, which roughly takes the form of a product of a power series counting perturbed pseudo-holomorphic tori, and the Reidemeister torsion of the symplectic Floer complex. We pointed out the formal resemblance of I_F with a generating function of genus 1 Gromov invariant; furthermore, for heuristic reasons one also expects a relation with the 1-loop generating function in the A-model side of mirror symmetry, which counts genus 1 holomorphic curves. The present article makes this expected relation precise in the simpl…
A local normal form theorem for smooth equivariant maps between Fréchet manifolds is established. Moreover, an elliptic version of this theorem is obtained. The proof these normal form results is inspired by the Lyapunov-Schmidt reduction for dynamical systems and by the Kuranishi method for moduli spaces, and uses a slice theorem for Fréchet manifolds as the main technical tool. As a consequence of this equivariant normal form theorem, the abstract moduli space obtained by factorizing a level set of the equivariant map with respect to the group action carries the structure of a Kuranishi spac…
Cyclotomic Structures in Symplectic Topology
本文推广Cohen-Jones-Segal构造至等变Morse函数，发展等变Floer理论，并在辛流形上建立辛上同调谱提升的分圆结构，连接Floer同调与p-adic Hodge理论。
Floer-theoretic filtration on Painlevé Hitchin systems
本文分类 Painlevé 方程对应 Higgs 丛模空间的等变 $\mathbb{C}^*$ 作用，计算其上同调的 Floer 理论滤过，并证明其在所有二维情形中与幂零锥分量重数滤过一致。
Rabinowitz Floer homology for Legendrian submanifolds in prequantization bundles
针对预量子化丛中具有Legendrian提升的闭单调Lagrangian子流形，在最小Maslov数大于2时定义其Rabinowitz Floer同调，并建立与量子同调的同构，用于计算二次曲面和旗流形中Lagrangian球面的量子同调环。
Equivariant Homological Mirror Symmetry for $\mathbb{C}$ and $\mathbb{C} P^1$
研究借助 Cartan 模型为 $\u000bmathbb{C}$ 和 $\u000bmathbb{C}P^1$ 构建等变 Floer $A_\infty$ 代数，并证明其等变 Lagrangian branes 范畴与 Givental 势函数的矩阵分解范畴等价。
On contact modulo p L-space covers
本文将 Roso（2023）关于极小 L-空间上等变接触结构的结果推广到模 p L-空间，利用 Borel Floer 上同调的 Serre 谱序列，并引入两个新的数值不变量。
In a previous paper, we showed that the original definition of cylindrical contact homology, with rational coefficients, is valid on a closed three-manifold with a dynamically convex contact form. However we did not show that this cylindrical contact homology is an invariant of the contact structure. In the present paper, we define "nonequivariant contact homology" and "S^1-equivariant contact homology", both with integer coefficients, for a contact form on a closed manifold in any dimension with no contractible Reeb orbits. We prove that these contact homologies depend only on the contact str…
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 eigenspaces. Taking Euler characteristics with respect to the induced grading yields a deformation of the intersection number. Dehn twists act naturally on equivariant Lagrangians. Cotangent bundles and Lefschetz fibrations give fully computable examples. A key step in computations is to impose the "dilation" condition stipulating that the BV operator applied…
In the approach to Gromov-Witten theory developed by Givental, genus-zero Gromov-Witten invariants of a manifold X are encoded by a Lagrangian cone in a certain infinite-dimensional symplectic vector space. We give a construction of this cone, in the spirit of S^1-equivariant Floer theory, in terms of S^1-equivariant Gromov-Witten theory of the product X \times P^1. This gives a conceptual understanding of the "dilaton shift": a change-of-variables which plays an essential role in Givental's theory.
In the previous paper, the author defined equivariant Floer cohomology for a complete intersection in a toric variety and showed that it is isomorphic to the small quantum D-module after a mirror transformation when the first Chern class c_1(M) of the tangent bundle is nef. In this paper, even when c_1(M) is not nef, we show that the equivariant Floer cohomology reconstructs the big quantum D-module under certain conditions on the ambient toric variety. The proof is based on a mirror theorem by Coates and Givental. The reconstruction procedure here gives a generalized mirror transformation fir…
Localization of Lagrangian Floer homology for $\mathbb{Z}_p$-actions
该研究针对奇素数p，在满足特定等变条件下证明了正合拉格朗日Floer同调的Smith不等式，推广了Seidel和Smith的对合局部化，得到p周期链环与其商空间辛Khovanov同调的秩不等式。
A version of mirror symmetry predicts a ring isomorphism between quantum cohomology of a symplectic manifold and Jacobian algebra of the Landau-Ginzburg mirror, and for toric manifolds Fukaya-Oh-Ohta-Ono constructed such a map called Kodaira-Spencer map using Lagrangian Floer theory. We discuss a general construction of Kodaira-Spencer ring homomorphism when LG mirror potential $W$ is given by $J$-holomorphic discs with boundary on a Lagrangian $L$: we find an $A_{\infty}$-algebra $\mathcal{B}$ whose $m_1$-complex is a Koszul complex for $W$ under mild assumptions on $L$. Closed-open map gives…
Fourier analysis of equivariant quantum cohomology
本文利用移位算子与等变参数建立等变量子上同调的傅里叶分析框架，提出量子体积的傅里叶对偶猜想及约化猜想，并借此观察环面镜像对称、证明射影丛或吹胀的量子上同调 D-模分解。
2d Mirrors in nonabelian 3d Mirror Symmetry
该研究建立非阿贝尔等变二维镜像对称与库仑分支几何的联系，开发代数几何框架研究库仑分支及其拉格朗日子簇，提出并证明相关存在性判据。
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