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This is a survey article about knot Floer homology. We present three constructions of this invariant: the original one using holomorphic disks, a combinatorial description using grid diagrams, and a combinatorial description in terms of the…

Geometric Topology · Mathematics 2016-03-18 Ciprian Manolescu

Numerous structural findings of homology manifolds have been derived in various ways in relation to $g_2$-values. The homology $4$-manifolds with $g_2\leq 5$ are characterized combinatorially in this article. It is well-known that all…

Geometric Topology · Mathematics 2024-08-21 Biplab Basak , Sourav Sarkar

This is the third paper of this series. In \cite{Wang20}, we defined the monopole Floer homology for any pair $(Y,\omega)$, where $Y$ is a compact oriented 3-manifold with toroidal boundary and $\omega$ is a suitable closed 2-form viewed as…

Geometric Topology · Mathematics 2023-01-11 Donghao Wang

Let $K$ be a rationally null-homologous knot in a three-manifold $Y$. We construct a version of knot Floer homology in this context, including a description of the Floer homology of a three-manifold obtained as Morse surgery on the knot…

Geometric Topology · Mathematics 2014-10-01 Peter Ozsvath , Zoltan Szabo

We classify genus-two L-space knots in the Poincar\'e homology sphere. This leads to the second knot Floer homology detection result for a knot of genus at least two, and the first such result outside of $S^3$. The argument uses the theory…

Geometric Topology · Mathematics 2023-06-02 Braeden Reinoso

We circumvent one of the roadblocks in associating Floer homotopy types to monotone Lagrangians, namely the curvature phenomena occurring in high dimensions. Given $N \ge 3$ and $R$ a connective $\mathbb E_1$-ring spectrum, there is a…

Symplectic Geometry · Mathematics 2025-07-08 Ciprian Mircea Bonciocat

This paper is devoted to the study of the knot Floer homology groups HFK(S^3,K_{2,n}), where K_{2,n} denotes the (2,n) cable of an arbitrary knot, K. It is shown that for sufficiently large |n|, the Floer homology of the cabled knot depends…

Geometric Topology · Mathematics 2014-10-01 Matthew Hedden

We count pseudoholomorphic curves in the higher-dimensional Heegaard Floer homology of disjoint cotangent fibers of a two dimensional disk. We show that the resulting algebra is isomorphic to the Hecke algebra associated to the symmetric…

Symplectic Geometry · Mathematics 2025-07-02 Yin Tian , Tianyu Yuan

Let $k$ be a positive integer and let $G$ be a graph with $n$ vertices. A connected $k$-subpartition of $G$ is a collection of $k$ pairwise disjoint sets (a.k.a. classes) of vertices in $G$ such that each set induces a connected subgraph.…

Combinatorics · Mathematics 2025-12-23 Phablo F. S. Moura , Hande Yaman , Roel Leus

We prove that the Knot Floer homology group of a fibred knot of genus g in the Alexander grading 1-g is isomorphic to a version of the fixed point Floer homology of an area-preserving representative of the monodromy.

Geometric Topology · Mathematics 2022-02-01 Paolo Ghiggini , Gilberto Spano

We give a partial characterization of bordered Floer homology in terms of sutured Floer homology. The bordered algebra and modules are direct sums of certain sutured Floer complexes. The algebra multiplication and algebra action correspond…

Geometric Topology · Mathematics 2010-10-19 Rumen Zarev

We define the longitude Floer homology of a knot K in S^3 and show that it is a topological invariant of K. Some basic properties of these homology groups are derived. In particular, we show that they distinguish the genus of K. We also…

Geometric Topology · Mathematics 2014-10-01 Eaman Eftekhary

For each integer $N\geq 2$, Mari\~no and Moore defined generalized Donaldson invariants by the methods of quantum field theory, and made predictions about the values of these invariants. Subsequently, Kronheimer gave a rigorous definition…

Geometric Topology · Mathematics 2020-04-01 Aliakbar Daemi , Yi Xie

This is a sequel to the authors' article [BKO](arXiv:1901.02239). We consider a hyperbolic knot $K$ in a closed 3-manifold $M$ and the cotangent bundle of its complement $M \setminus K$. We equip $M \setminus K$ with a hyperbolic metric $h$…

Symplectic Geometry · Mathematics 2019-03-12 Youngjin Bae , Seonhwa Kim , Yong-Geun Oh

Bordered Floer homology associates to a parametrized oriented surface a certain differential graded algebra. We study the properties of this algebra under splittings of the surface. To the circle we associate a differential graded…

Geometric Topology · Mathematics 2017-01-23 Christopher L. Douglas , Ciprian Manolescu

We define Hamiltonian Floer homology with differential graded (DG) local coefficients for symplectically aspherical manifolds. The differential of the underlying complex involves chain representatives of the fundamental classes of the…

Symplectic Geometry · Mathematics 2026-05-14 Jean-François Barraud , Mihai Damian , Vincent Humilière , Alexandru Oancea

The main theorem of this article provides sufficient conditions for a degree $d$ finite cover $M'$ of a hyperbolic 3-manifold $M$ to be a surface-bundle. Let $F$ be an embedded, closed and orientable surface of genus $g$, close to a minimal…

Geometric Topology · Mathematics 2012-04-10 Claire Renard

We study the homology concordance group of knots in integer homology three-spheres which bound integer homology four-balls. Using knot Floer homology, we construct an infinite number of $\mathbb{Z}$-valued, linearly independent homology…

Geometric Topology · Mathematics 2024-09-04 Irving Dai , Jennifer Hom , Matthew Stoffregen , Linh Truong

Let $LHT$ be a left handed trefoil knot and $K$ be any knot. We define $M_n(K)$ to be the homology $3$-sphere which is represented by a simple link of $LHT$ and $LHT \sharp K$ with framings $0$ and $n$ respectively. Starting with this link,…

Geometric Topology · Mathematics 2015-01-21 Masatsuna Tsuchiya

In this paper, we define real link Floer homology for strongly invertible and doubly periodic links in closed real $3$-manifolds with connected fixed sets, which generalizes real Heegaard Floer homology and real sutured Heegaard Floer…

Geometric Topology · Mathematics 2026-04-24 Yonghan Xiao
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