Eaman Eftekhary
We show that if a positive integral surgery on a knot K inside a homology sphere X with Seifert genus g(K) results in an induced knot K_n in X_n(K)=Y which has simple Floer homology, we should have n>=2g(K). Moreover, if X is the standard sphere, the three-manifold Y is a L-space and the Heegaard Floer homology groups of K are determined by its Alexander polynomial.
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Using Taubes' periodic ends theorem, Auckly gave examples of toroidal and hyperbolic irreducible integer homology spheres which are not surgery on a knot in the three-sphere. We give an obstruction to a homology sphere being surgery on a knot coming from Heegaard Floer homology. This is used to construct infinitely many small Seifert fibered examples.
Surgery formula for the renormalized Euler characteristic of Heegaard Floer homology
我们证明了Ozsvath和Szabo的重整化欧拉示性数的一个外科手术公式。对于有理同调三球面，这个欧拉特征线和Seiberg-Witten不变量之间相等。
Surgery exact triangles in involutive Heegaard Floer homology
本文通过对合加倍模型建立对合Heegaard Floer同调的手术正合三角形，并由此得到Ozsváth-Szabó映射锥公式的对合版本，进而构造出不同调配边于Seifert纤维空间线性组合的整数同调球。
We prove the existence of an exact triangle for the Pin(2)-monopole Floer homology groups of three manifolds related by specific Dehn surgeries on a given knot. Unlike the counterpart in usual monopole Floer homology, only two of the three maps are those induced by the corresponding elementary cobordism. We use this triangle to describe the invariants associated to homology spheres obtained by (\pm1)-surgery on alternating knots.
Given an equivariant knot $K$ of order $2$, we study the induced action of the symmetry on the knot Floer homology. We relate this action with the induced action of the symmetry on the Heegaard Floer homology of large surgeries on $K$. This surgery formula can be thought of as an equivariant analog of the involutive large surgery formula proved by Hendricks and Manolescu. As a consequence, we obtain that for certain double branched covers of $S^{3}$ and corks, the induced action of the involution on Heegaard Floer homology can be identified with an action on the knot Floer homology. As an appl…
We prove that if two knots are concordant, their involutive knot Floer complexes satisfy a certain type of stable equivalence.
Localization and the Floer homology of strongly invertible knots
该研究在定向强可逆纽结K的纽结Floer同调中建立两个谱序列，分别关联K与三维球面的Heegaard Floer同调、K的奇异纽结Floer同调与K的商纽结Floer同调。
The symplectic Floer homology of the figure eight knot
本文计算了8字形纽结的辛弗洛尔同调。这提供了具有平凡辛弗洛尔同调的第一非平凡纽结。
We prove that the rank of knot Floer homology detects the Hopf links, and generalize this result further to classify the links of the second smallest knot Floer homology. We also prove a knot Floer homology analog of arXiv:1910.04246v1 [math.GT] and give a partial answer to when the equality holds in the rank inequality between the knot Floer homology of a link and its sublinks.
Knots of low knot Floer width
该研究分类了宽度为2的纽结Floer复形的链同伦等价类，证明其无非平凡局部系统，并应用此结论得出所有Montesinos纽结都有可同时水平、垂直简化的基。
We exhibit an infinite family of knots with isomorphic knot Heegaard Floer homology. Each knot in this infinite family admits a nontrivial genus two mutant which shares the same total dimension in both knot Floer homology and Khovanov homology. Each knot is distinguished from its genus two mutant by both knot Floer homology and Khovanov homology as bigraded groups. Additionally, for both knot Heegaard Floer homology and Khovanov homology, the genus two mutation interchanges the groups in $δ$-gradings $k$ and $-k$.
The knot Floer complex and the concordance invariant $\varepsilon$ can be used to define a filtration on the smooth concordance group. We exhibit an ordered subset of this filtration that is isomorphic to $\mathbb{N} \times \mathbb{N}$ and consists of topologically slice knots.
Corrigendum to "Knot Floer homology detects fibred knots"
纠正了\cite{Ni}中引用JSJ理论的一个错误。\cite{Ni}中的一些参数也相应地进行了轻微修改。
It is known that knot Floer homology detects the genus and Alexander polynomial of a knot. We investigate whether knot Floer homology of $K$ detects more structure of minimal genus Seifert surfaces for $K$. We define an invariant of algebraically slice, genus one knots and provide examples to show that knot Floer homology does not detect this invariant. Finally, we remark that certain metabelian $L^2$-signatures bound this invariant from below.
On contact surgery and knot Floer invariants
本文建立了接触手术与Legendrian纽结Floer不变量之间的非消失关系，利用缝合Floer同调及极限构造，证明了接触不变量非零蕴含相应Legendrian不变量非零。
We define Floer homology theories for oriented, singular knots in S^3 and show that one of these theories can be defined combinatorially for planar singular knots.
Knot Floer homology of (1,1)-knots
本文给出了一种计算（1，1）-纽结的Z系数的纽结弗洛尔同调的组合方法，并对具有十个交叉点的非交错（1，1）-纽结和（-2，m，n）型椒盐卷饼纽结进行了证明.我们的计算确定了这种类型的椒盐卷饼结的解结数和4属。
We write down an explicit formula for the $+$ version of the Heegaard Floer homology (as an absolutely graded vector space over an arbitrary field) of the results of Dehn surgery on a knot $K$ in $S^3$ in terms of homological data derived from $CFK^{\infty}(K)$. This allows us to prove some results about Dehn surgery on knots in $S^3$. In particular, we show that for a fixed manifold there are only finitely many alternating knots that can produce it by surgery. This is an improvement on a recent result by Lackenby and Purcell. We also derive a lower bound on the genus of knots depending on the…
Knot Floer homology and the fundamental group of $ (1,1) $ knots
本文提出一种算法，可从$ (1,1) $纽结基本群的特定展示计算其纽结Floer同调。
For a knot K and its knot Floer complex CFK^-(K), we introduce an algorithm to compute the bordered Floer bimodule of the complement of the knot and its meridian. The grading of the module computes spin^c-summands of a meridional knot in the large Dehn surgery manifold, which can be also extended to arbitrary framing n.
In this paper, we introduce a sequence of invariants of a knot K in S^3: the knot Floer homology groups of the preimage of K in the m-fold cyclic branched cover over K. We exhibit the knot Floer homology in the m-fold branched cover as the categorification of a multiple of the Turaev torsion in the case where the m-fold branched cover is a rational homology sphere. In addition, when K is a 2-bridge knot, we prove that the knot Floer homology of the lifted knot in a particular Spin^c structure in the branched double cover matches the knot Floer homology of the original knot K in S^3. We conclud…
We use four dimensional techniques to derive general bounds on the $τ$ invariant of a satellite knot in $S^{3}$.
Knot Floer homology is an invariant for knots in the three-sphere for which the Euler characteristic is the Alexander-Conway polynomial of the knot. The aim of this paper is to study this homology for a class of satellite knots, so as to see how a certain relation between the Alexander-Conway polynomials of the satellite, companion and pattern is generalized on the level of the knot Floer homology. We also use our observations to study a classical geometric invariant, the Seifert genus, of our satellite knots.
This note explores two questions: (1) Which bigraded groups arise as the knot Floer homology of a knot in the three-sphere? (2) Given a knot, how many distinct knots share its Floer homology? Regarding the first, we show there exist bigraded groups satisfying all previously known constraints of knot Floer homology which do not arise as the invariant of a knot. This leads to a new constraint for knots admitting lens space surgeries, as well as a proof that the rank of knot Floer homology detects the trefoil knot. For the second, we show that any non-trivial band sum of two unknots gives rise to…
Heegaard Floer Surgery Formula and Cosmetic Surgeries
本文利用Heegaard Floer同调公式，证明了特定结的美容手术系数必须大于1，并且非整数手术不会与原流形同胚。
Let $\widetilde{K}$ be a 2-periodic knot in $S^3$ with quotient $K$. We prove a rank inequality between the knot Floer homology of $\widetilde{K}$ and the knot Floer homology of $K$ using a spectral sequence of Hendricks, Lipshitz and Sarkar. We also conjecture a filtered refinement of this inequality, for which we give computational evidence, and produce applications to the Alexander polynomials of $\widetilde{K}$ and $K$.
We review some recent results in knot concordance and homology cobordism. The proofs rely on various forms of Heegaard Floer homology. We also discuss related open problems.
Rational surgery exact triangles in Heegaard Floer homology
本文提出了一种在Heegaard Floer同调中适用于所有正有理斜率的手术精确三角形构造方法，通过解决组合问题并利用Spin^c共轭对称性实现了扩展。
A well-known conjecture of Rasmussen states that for any knot $K$ in $S^{3}$, the rank of the reduced Khovanov homology of $K$ is greater than or equal to the rank of the reduced knot Floer homology of $K$. This rank inequality is supposed to arise as the result of a spectral sequence from Khovanov homology to knot Floer homology. Using an oriented cube of resolutions construction for a homology theory related to knot Floer homology, we prove this conjecture.
Effective computation of knot Floer homology
我们扩展了Beliakova的方法计算结弗洛尔同调，并在一个公开的计算机程序中实现它。我们回顾了主要的编程和最优化方法使用。我们的程序，然后用来检查的弗洛尔同调的一个素数非交替结与小于12交叉没有扭转。
In this paper we study the knot Floer homology of a subfamily of twisted $(p, q)$ torus knots where $q \equiv\pm1$ (mod $p$). Specifically, we classify the knots in this subfamily that admit L-space surgeries. To do calculations, we use the fact that these knots are $(1, 1)$ knots and, therefore, admit a genus one Heegaard diagram.
Computation of the knot Floer complex of knots of thickness one
本文提出了一种计算厚度为一结的Floer复形的算法，并展示了其在非整数Dehn手术斜率特征化中的应用。
Knot Floer homology of boundary Dehn twists
本文证明纽结Floer复形及翻转映射限制可确定Borromean纽结$\pm 1$手术的对偶纽结，进而表明Heegaard Floer同调能检测边界Dehn扭转。
In this paper, we use Heegaard Floer homology to study reducible surgeries. In particular, suppose K is a non-cable knot in the three-sphere with an L-space surgery. If p-surgery on K is reducible, we show that p equals 2g(K)-1. This implies that any knot with an L-space surgery has at most one reducible surgery, a fact that we show additionally for any knot of genus at most two.
We prove that the map on knot Floer homology induced by a strongly homotopy-ribbon concordance is injective.
The symplectic Floer homology of composite knots
我们发展了一种计算复合纽结的辛弗洛尔同调的方法。在\cite{li}中定义的纽结的辛弗洛尔同调自然地允许整数分次提升，它形成了一个滤除和诱导的谱序列.这样的谱序列收敛于\cite{li}中纽结的辛同调。我们证明了对于由辫子表示的复合结点，存在另一个谱序列收敛于$\Z$ -分次辛弗洛尔同调。
Cabling formula and colored knot Floer homology
本文通过带边界cabling构造，建立了任意纽结的彩色Floer同调的一般公式，将其化为普通Floer同调与彩色unknot代数，推广了Alishahi-Gorsky-Liu的结果。
For any three-manifold presented as surgery on a framed link (L,Λ) in an integral homology sphere, Manolescu and Ozsváth construct a hypercube of chain complexes whose homology calculates the Heegaard Floer homology of Λ-framed surgery on Y. This carries a natural filtration that exists on any hypercube of chain complexes; we study the E_2 page of the associated spectral sequence, called Framed Floer homology. One purpose of this paper is to show that Framed Floer homology is an invariant of oriented framed links, but not an invariant of the surgered manifold. We discuss how this relates to an…
Using a Heegaard diagram for the pullback of a knot $K \subset S^3$ in its cyclic branched cover $Σ_m(K)$ obtained from a grid diagram for $K$, we give a combinatorial proof for the invariance of the associated combinatorial knot Floer homology over $\mathbb{Z}$.
On knot Floer homology for some fibered knots
一个配套文件，“在结弗洛尔同调分支双盖”适用于编织分支基因座。我们reprove的主要结果，该文件关于交替分支轨迹时，投影到一个环，而不使用Khovanov同源。这提供了两个优点：1）结果适用于整数系数，以及2）自旋结构更容易辨别。我们将这个结果应用到一个分支轨迹，这是一个辫子，并使用辫子结构，以找到一个纤维结的分支双重覆盖的信息。在某些情况下，这提供了关于纽结弗洛尔同调的所有信息，并且可以用于导出关于相关联的纤维三流形的Heegaard-弗洛尔同调的信息。某些阳性编织物的结果也包括在内，建立了类似于E。Eftekhary在Heegaard-Floer设置。
We define a new smooth concordance homomorphism based on the knot Floer complex and an associated concordance invariant, epsilon. As an application, we show that an infinite family of topologically slice knots are independent in the smooth concordance group.
We prove that, up to local equivalences, a suitable truncation of the involutive knot Floer homology of a knot in $S^3$ and the involutive bordered Heegaard Floer theory of its complement determine each other. In particular, given two knots $K_1$ and $K_2$, we prove that the $\mathbb{F}_2[U,V]/(UV)$-coefficient involutive knot Floer homology of $K_1 \sharp -K_2$ is $ι_K$-locally trivial if $\widehat{CFD}(S^3 \backslash K_1)$ and $\widehat{CFD}(S^2 \backslash K_2)$ satisfy a certain condition which can be seen as the bordered counterpart of $ι_K$-local equivalence. We further establish an expli…
Notes on the Heegaard-Floer Link Surgery Spectral Sequence
本文主要分为两个部分：第一部分：介绍奥兹瓦特和Z。Szabo的连接手术谱序列的构造。这里没有新的结果，但这一部分稍微修改和扩展了他们的证明，并作为第二部分的辅助。第二部分：一些修改的谱序列适合结弗洛尔同调;一个博览会的不变性的谱序列，根据一个合适的等价物，从改变的基础花束;和一个帐户的态射诱导的谱序列适当的四维cobordisms和他们如何依赖于四个流形。这是作者在介绍P. Ozsvath和Z. Szabo的论文“On the Heegaard-弗洛尔同调of double branched covers. "
Using a Heegaard diagram for the pullback of a knot $K \subset S^3$ in its cyclic double branched cover $Σ_2(K)$, we give a combinatorial proof for the invariance of knot Floer homology over $\mathbb{Z}$.
The aim of this paper is to study the behavior of knot Floer homology under Murasugi sum. We establish a graded version of Ni's isomorphism between the extremal knot Floer homology of Murasugi sum of two links and the tensor product of the extremal knot Floer homology groups of the two summands. We further prove that $τ=g$ for each summand if and only if $τ=g$ holds for the Murasugi sum (with $τ$ and $g$ defined appropriately for multi-component links). Some applications are presented.
In an earlier work, we introduced a family of t-modified knot Floer homologies, defined by modifying the construction of knot Floer homology HFK-minus. The resulting groups were then used to define concordance homomorphisms indexed by t in [0,2]. In the present work we elaborate on the special case t=1, and call the corresponding modified knot Floer homology the unoriented knot Floer homology. Using elementary methods (based on grid diagrams and normal forms for surface cobordisms), we show that the resulting concordance homomorphism gives a lower bound for the smooth 4-dimensional crosscap nu…
We apply the theory of "peculiar modules" for the Floer homology of 4-ended tangles developed by Zibrowius (specifically, the immersed curve interpretation of the tangle invariants) to compute the Knot Floer Homology ($\widehat{HFK}$) of 3-stranded pretzel knots of the form ${P(2a,-2b-1,\pm(2c+1))}$ for positive integers $a,b,c$. This corrects a previous computation by Eftekhary; in particular, for the case of ${P(2a,-2b-1,2c+1)}$ where $b<c$ and $b<a-1$, it turns out the rank of $\widehat{HFK}$ is larger than that predicted by that work.
Knot Floer homology detects fibred knots
Ozsváth和Szabó证实，结弗洛尔同调检测到$S^3$中的重复结。我们将证明这一猜想的零同源纽结在任意封闭的3-流形。也就是说，如果$K$是闭3-流形$Y$中的纽结，$Y-K$是不可约的，并且$\hat{HFK}(Y,K)$是幺半群，则$K$是可约的。证明依赖于Gabai，Ozsváth-Szabó，Ghiggini和作者以前的作品。一个推论是，如果$S^3$中的一个结允许透镜空间手术，则该结被切除。
A combinatorial approach to surgery formulas in Heegaard Floer homology
利用Heegaard弗洛尔同调的组合方法，我们得到了一个相对简单的计算hat Heegaard弗洛尔同调的公式，该公式是通过对同调球面Y中的纽结K进行有理外科手术而得到的。
We compute the effect of concordance surgery, a generalization of knot surgery defined using a self-concordance of a knot, on the Ozsváth-Szabó 4-manifold invariant. The formula involves the graded Lefschetz number of the concordance map on knot Floer homology. The proof uses the sutured Floer TQFT, and a version of sutured Floer homology perturbed by a 2-form.
Extensive rewrite. Tables and proofs have been reformatted and/or rewritten for clarity.
Floer homology and knot complements
利用弗洛尔同调的Ozsvath-Szabo理论定义了三流形中纽结补的一个不变量。这个不变量采用过滤链复形的形式，我们称之为CF_r。它携带关于结上大型整体手术的弗洛尔同调的信息。使用确切的三角形，我们得到有关其他手术结的信息，以及由某些手术配边引起的弗洛尔同调的映射。我们在S^3中定义了一类\em{perfect}纽结，它的CF_r具有特别简单的形式。对于这些纽结，Ozsvath-Szabo理论的形式性质使我们能够对弗洛尔同调进行完整的计算。这是作者的论文;许多结果已经由Ozsvath和Szabo在Math.GT/0209056中独立发现。
On the skein exact squence for knot Floer homology
研究了纽结弗洛尔同调的绞合正合列.我们证明了这个序列的精确分级版本，也是一个使用$\HFm$。此外，一个完整的论点也纯粹是在网格图的领域。
Twisting and stabilization in knot Floer homology
该研究探讨纽结Floer同调相关问题，证明对纽结的平行股线施加多次全扭转后，其极值纽结Floer同调在扭转次数趋于无穷时会稳定化。
This note corrects the mistakes in the splicing formulas of the paper "Floer homology and splicing knot complements". The mistakes are the result of the incorrect assumption that for a knot $K$ inside a homology sphere $Y$, the involution on the knot Floer homology of $K$ which corresponds to moving the basepoints by one full twist around $K$ is trivial. The correction implicitly involves considering the contribution from this (possibly non-trivial) involution in a number of places.
Knot Floer homology, link Floer homology and link detection
受Khovanov同调启发，本文证明了knot和link Floer同调能检测多种特定链环，发现了无限多对具有相同Khovanov与knot Floer同调但可被link Floer同调区分的链环，并给出了annular Khovanov同调的拓扑应用。
We prove that knot Floer homology of a certain class of knots is non-trivial in next-to-top Alexander grading. This gives a partial affirmative answer to a question posed by Baldwin and Vela-Vick which asks if the same is true for all non-trivial knots in $S^3$.
In this note, we give a short proof that knot Floer thickness is a lower bound on the dealternating number of a knot. The result is originally due to work of Abe and Kishimoto, Lowrance, and Turaev. Our proof is a modification of the Stipsicz-Szabo approach using Kauffman states to show that thickness bounds the minimal number of bad domains in a knot diagram.
We examine surgery on a knot in $S^3$ to determine surgery obstructions to Seifert fibered integral homology spheres. We find such surgery obstructions using Heegaard Floer, Knot Floer homology and the mapping cone formula for computing Heegaard Floer homology of surgery on a knot. Here however, we take a different approach and use the number of singular fibers of a Seifert fibered integral homology sphere, which is the toroidal structure, to find obstructions. This approach allows us to show that genus one knots cannot yield Seifert fibered integral homology spheres with six or more singular …
Connected sums and directed systems in knot Floer homologies
本文证明了instanton knot Floer homology的基本性质，主要贡献包括推导其连通和公式、有向skein正合三角形，以及提出适用于所有Floer理论的自由有限生成链复形新模型。
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