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We use bordered Floer homology, specifically the immersed curve interpretation of the bordered pairing theorem, to compute various three- and four-dimensional invariants of satellite knots with arbitrary companions and patterns from a…

Geometric Topology · Mathematics 2023-05-31 Holt Bodish

This note contains two remarks about the application of the d-invariant in Heegaard Floer homology and Donaldson's diagonalization theorem to knot theory. The first is the equivalence of two obstructions they give to a 2-bridge knot being…

Geometric Topology · Mathematics 2015-12-29 Joshua Evan Greene

Lipshitz, Ozsv\'ath, and Thurston extend the theory of bordered Heegaard Floer homology to compute $\mathbf{CF}^-$. Like with the hat theory, their minus invariants provide a recipe to compute knot invariants associated to satellite knots.…

Geometric Topology · Mathematics 2025-06-05 Shikhin Sethi

Let $K$ be a null-homologous knot in a three-manifold $Y$. We give a description of the Heegaard Floer homology of integer surgeries on $Y$ along $K$ in terms of the filtered homotopy type of the knot invariant for $K$. As an illustration,…

Geometric Topology · Mathematics 2007-12-08 Peter Ozsvath , Zoltan Szabo

Heegaard Floer theory is a kind of topological quantum field theory, assigning graded groups to closed, connected, oriented 3-manifolds and group homomorphisms to smooth, oriented 4-dimensional cobordisms. Bordered Heegaard Floer homology…

Geometric Topology · Mathematics 2011-09-21 Robert Lipshitz , Peter S. Ozsvath , Dylan P. Thurston

When restricted to alternating links, both Heegaard Floer and Khovanov homology concentrate along a single diagonal $\delta$-grading. This leads to the broader class of thin links that one would like to characterize without reference to the…

Geometric Topology · Mathematics 2024-05-22 Artem Kotelskiy , Liam Watson , Claudius Zibrowius

We find a geometric invariant of isotopy classes of strongly irreducible Heegaard splittings of toroidal 3-manifolds. Combining this invariant with a theorem of R Weidmann, proved here in the appendix, we show that a closed, totally…

Geometric Topology · Mathematics 2009-03-06 David Bachman , Ryan Derby-Talbot

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…

Geometric Topology · Mathematics 2015-03-06 Jennifer Hom

In 2003, Ozsv\'ath and Szab\'o defined the concordance invariant $\tau$ for knots in oriented 3-manifolds as part of the Heegaard Floer homology package. In 2011, Sarkar gave a combinatorial definition of $\tau$ for knots in $S^3$ and a…

Geometric Topology · Mathematics 2018-07-20 Katherine Vance

This article proves a uniform exponential decay estimate for Seiberg-Witten equations on non-compact 4-manifolds with exact symplectic ends of bounded geometry. This is an extension of the analysis for asymptotically flat almost K\"ahler…

Geometric Topology · Mathematics 2021-06-03 Boyu Zhang

We define combinatorial Floer homology of a transverse pair of noncontractibe nonisotopic embedded loops in an oriented 2-manifold without boundary, prove that it is invariant under isotopy, and prove that it is isomorphic to the original…

Symplectic Geometry · Mathematics 2015-03-20 Vin de Silva , Joel Robbin , Dietmar Salamon

We give a short introduction to the contact invariant in bordered Floer homology defined by F\"oldv\'ari, Hendricks, and the authors. The construction relies on a special class of foliated open books. We discuss a procedure to obtain such a…

Geometric Topology · Mathematics 2022-11-02 Akram Alishahi , Joan Licata , Ina Petkova , Vera Vértesi

We investigate symmetry properties of peculiar modules, a Heegaard Floer invariant of 4-ended tangles which the author introduced in [arXiv:1712.05050]. In particular, we give an almost complete answer to the geography problem for…

Geometric Topology · Mathematics 2024-07-04 Claudius Zibrowius

We introduce a framework for defining concordance invariants of knots using equivariant singular instanton Floer theory with Chern-Simons filtration. It is demonstrated that many of the concordance invariants defined using instantons in…

Geometric Topology · Mathematics 2025-12-03 Aliakbar Daemi , Hayato Imori , Kouki Sato , Christopher Scaduto , Masaki Taniguchi

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 Geometry · Mathematics 2021-11-09 Kristen Hendricks , Robert Lipshitz , Sucharit Sarkar

The $\Upsilon$ invariant is a concordance invariant defined by using knot Floer homology. F\"{o}ldv\'{a}ri gives a combinatorial restructure of it using grid homology. We extend the combinatorial $\Upsilon$ invariant for balanced spatial…

Geometric Topology · Mathematics 2024-06-10 Hajime Kubota

We prove the existence of a localization spectral sequence for the hat variant of Guth and Manolescu's recent construction of real Heegaard Floer homology, and apply it to branched double covers and strongly invertible knots. Our…

Geometric Topology · Mathematics 2025-08-07 Kristen Hendricks

Inspired by the $S^n$ colored version of Khovanov and Khovanov-Rozansky homology, we define a colored version of knot Floer homology by studying the colimit of a directed system of link Floer homology with infinite full twists.…

Geometric Topology · Mathematics 2025-09-01 Akram Alishahi , Eugene Gorsky , Beibei Liu

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…

Geometric Topology · Mathematics 2019-04-11 Claire Zajaczkowski

We define an invariant of contact 3-manifolds with convex boundary using Kronheimer and Mrowka's sutured instanton Floer homology theory. To the best of our knowledge, this is the first invariant of contact manifolds -- with or without…

Symplectic Geometry · Mathematics 2016-03-28 John A. Baldwin , Steven Sivek