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Bordered Heegaard Floer homology is an invariant for three-manifolds with boundary. In particular, this invariant associates to a handle decomposition of a surface F a differential graded algebra, and to an arc slide between two handle…

Geometric Topology · Mathematics 2015-02-10 Robert Lipshitz , Peter S. Ozsváth , Dylan P. Thurston

Let $K$ be a rationally null-homologous knot in a $3$-manifold $Y$, equipped with a nonzero framing $\lambda$, and let $Y_\lambda(K)$ denote the result of $\lambda$-framed surgery on $Y$. Ozsv\'ath and Szab\'o gave a formula for the…

Geometric Topology · Mathematics 2021-01-05 Matthew Hedden , Adam Simon Levine

Bordered Heegaard Floer homology is a three-manifold invariant which associates to a surface F an algebra A(F) and to a three-manifold Y with boundary identified with F a module over A(F). In this paper, we establish naturality properties…

Geometric Topology · Mathematics 2016-01-20 Robert Lipshitz , Peter S. Ozsvath , Dylan P. Thurston

We use grid diagrams to give a combinatorial algorithm for computing the knot Floer homology of the pullback of a knot K in its m-fold cyclic branched cover Sigma^m(K), and we give computations when m=2 for over fifty three-bridge knots…

Geometric Topology · Mathematics 2016-01-20 Adam Simon Levine

We give an algorithm for computing the knot Floer homology of a $ (1,1) $ knot from a particular presentation of its fundamental group.

Geometric Topology · Mathematics 2024-12-25 Matthew Hedden , Jiajun Wang , Xiliu Yang

Knot Floer homology is a knot invariant defined using holomorphic curves. In more recent work, taking cues from bordered Floer homology,the authors described another knot invariant, called "bordered knot Floer homology", which has an…

Geometric Topology · Mathematics 2019-12-05 Zoltan Szabo , Peter Ozsvath

We present a braid-theoretic approach to combinatorially computing knot Floer homology. To a knot or link K, which is braided about the standard disk open book decomposition for (S^3,\xi_std), we associate a corresponding multi-pointed nice…

Geometric Topology · Mathematics 2013-12-20 Peter Lambert-Cole , Michaela Stone , David Shea Vela-Vick

We define a "reduced" version of the knot Floer complex $CFK^-(K)$, and show that it behaves well under connected sums and retains enough information to compute Heegaard Floer $d$-invariants of manifolds arising as surgeries on the knot…

Geometric Topology · Mathematics 2015-09-04 David Krcatovich

Let K \subset Y be a knot in a three manifold which admits a longitude-framed surgery such that the surgered manifold has first Betti number greater than that of Y. We find a formula which computes the twisted Floer homology of the surgered…

Geometric Topology · Mathematics 2009-10-13 Evan Fink

We develop and implement an algorithm that computes the full knot Floer complex of knots of thickness one. As an application, by extending this algorithm to certain knots of thickness two, we show that all but finitely many non-integral…

Geometric Topology · Mathematics 2025-12-19 Patricia Sorya

We study the sutured Floer homology invariants of the sutured manifold obtained by cutting a knot complement along a Seifert surface, R. We show that these invariants are finer than the "top term" of the knot Floer homology, which they…

Geometric Topology · Mathematics 2014-10-01 Matthew Hedden , Andras Juhasz , Sucharit Sarkar

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…

Geometric Topology · Mathematics 2017-07-31 Matthew Hedden , Liam Watson

We introduce an extra filtration of $\CFK(Y,K)$ and use it in order to obtain formulas for Floer homology of $(Y,K)$, which is obtained from $(Y_i,K_i), i=1,2$ by gluing the knot complements on the framed torus boundaries.

Geometric Topology · Mathematics 2007-05-23 Eaman Eftekhary

We compute the knot Floer filtration induced by a cable of the meridian of a knot in the manifold obtained by large integer surgery along the knot. We give a formula in terms of the original knot Floer complex of the knot in the…

Geometric Topology · Mathematics 2019-04-02 Linh Truong

We perform two explicit computations of bordered Heegaard Floer invariants. The first is the type D trimodule associated to the trivial S^1 bundle over the pair of pants P. The second is a bimodule that is necessary for self-gluing, when…

Geometric Topology · Mathematics 2016-12-21 Jonathan Hanselman

Let $K$ denote a knot inside the homology sphere $Y$ and $K'$ denote a knot inside a homology sphere $L$-space. Let $X=Y(K,K')$ denote the 3-manifold obtained by splicing the complements of $K$ and $K'$. We show that…

Geometric Topology · Mathematics 2018-01-18 Narges Bagherifard , Eaman Eftekhary

We show that bordered Floer homology provides a categorification of a TQFT described by Donaldson. This, in turn, leads to a proof that both the Alexander module of a knot and the Seifert form are completely determined by Heegaard Floer…

Geometric Topology · Mathematics 2017-05-17 Jennifer Hom , Tye Lidman , Liam Watson

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…

Geometric Topology · Mathematics 2022-04-13 Sungkyung Kang

We construct Heegaard Floer theory for 3-manifolds with connected boundary. The theory associates to an oriented, parametrized two-manifold a differential graded algebra. For a three-manifold with parametrized boundary, the invariant comes…

Geometric Topology · Mathematics 2021-01-26 Robert Lipshitz , Peter Ozsvath , Dylan Thurston

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…

Geometric Topology · Mathematics 2017-08-08 Fyodor Gainullin
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