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A companion paper to "On knot Floer homology in branched double covers" applied to braided branched loci. We reprove the main result of that paper concerning alternating branched loci when projected to an annulus, without using Khovanov…

Geometric Topology · Mathematics 2007-06-07 Lawrence P. Roberts

We generalize H. Seifert's algorithm for finding a Seifert surface for a knot or link. The generalization applies to "framed oriented measured lamination links." For knots, a Seifert surface determines a unique framing. In our setting, we…

Geometric Topology · Mathematics 2019-01-01 Ulrich Oertel

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 a new variant of Rabinowitz Floer homology that is particularly well suited to studying the growth rate of leaf-wise intersections. We prove that for closed manifolds $M$ whose loop space is "complicated", if $\Sigma$ is a…

Symplectic Geometry · Mathematics 2011-01-26 Leonardo Macarini , Will J. Merry , Gabriel P. Paternain

We define a sutured cobordism category of surfaces with boundary and 3-manifolds with corners. In this category a sutured 3-manifold is regarded as a morphism from the empty surface to itself. In the process we define a new class of…

Geometric Topology · Mathematics 2009-09-18 Rumen Zarev

Let $E_{k}^{F}(D)$ be the spectral sequence induced by the oriented cube of resolutions on knot Floer homology. We prove that $E_{2}^{F}(D)$ is a triply graded link invariant whose graded Euler characteristic is the HOMFLY-PT polynomial and…

Geometric Topology · Mathematics 2017-03-07 Nathan Dowlin

We prove the equivalence of the sutured versions of Heegaard Floer homology, monopole Floer homology, and embedded contact homology. As applications we show that the knot versions of Heegaard Floer homology and embedded contact homology are…

Symplectic Geometry · Mathematics 2024-03-26 Vincent Colin , Paolo Ghiggini , Ko Honda

We establish a framework for extending invariants of sutured manifolds to invariants of pairs of sutured manifolds who differ by attaching a basic slice along a torus boundary component. In the particular case of (bordered-)sutured Floer…

Geometric Topology · Mathematics 2022-04-28 Thomas Hockenhull

We introduce a simple combinatorial method for computing all versions of the knot Floer homology of the preimage of a two-bridge knot K(p,q) inside its double-branched cover, -L(p,q). The 4-pointed genus 1 Heegaard diagram we obtain looks…

Geometric Topology · Mathematics 2007-05-23 J. Elisenda Grigsby

We adapt the Ozsv\'ath-Szab\'o full path algorithm to every star-shaped graph and establish a correspondence between negative-twisting tight contact structures on any Seifert fibred space over $S^2$, and its Heegaard Floer homology groups…

Geometric Topology · Mathematics 2026-05-04 Alberto Cavallo , Irena Matkovič

We consider a class of manifolds with torus boundary admitting bordered Heegaard Floer homology of a particularly simple form, namely, the type D structure may be described graphically by a disjoint union of loops. We develop a calculus for…

Geometric Topology · Mathematics 2023-06-14 Jonathan Hanselman , Liam Watson

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

We describe a new relation between the topology of hypersurface complements, Milnor fibers and degree of gradient mappings. In particular we show that any projective hypersurface has affine parts which are bouquets of spheres. The main…

Algebraic Topology · Mathematics 2007-05-23 Alexandru Dimca , Stefan Papadima

Using the theory of perverse sheaves of vanishing cycles, we define a homological invariant of knots in three-manifolds, similar to the three-manifold invariant constructed by Abouzaid and the second author. We use spaces of SL(2,C) flat…

Geometric Topology · Mathematics 2019-06-19 Laurent Côté , Ciprian Manolescu

We compute the involutive Heegaard Floer homology of the family of three-manifolds obtained by plumbings along almost-rational graphs. (This includes all Seifert fibered homology spheres.) We also study the involutive Heegaard Floer…

Geometric Topology · Mathematics 2024-08-27 Irving Dai , Ciprian Manolescu

We introduce a notion of complexity for Sefiert homology spheres by establishing a correspondence between lattice point counting in tethrahedra and the Heegaard-Floer homology. This complexity turns out to be equivalent to a version of…

Geometric Topology · Mathematics 2015-01-23 Mahir Bilen Can , Cagri Karakurt

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 develop a version of Seiberg--Witten Floer cohomology/homotopy type for a spin$^c$ 4-manifold with boundary and with an involution which reverses the spin$^c$ structure, as well as a version of Floer cohomology/homotopy type for oriented…

Geometric Topology · Mathematics 2023-04-18 Hokuto Konno , Jin Miyazawa , Masaki Taniguchi

We show that the properties of admitting a co-oriented taut foliation and having a left-orderable fundamental group are equivalent for rational homology $3$-sphere graph manifolds and relate them to the property of not being a…

Geometric Topology · Mathematics 2017-01-31 Steven Boyer , Adam Clay

We explain how to use bordered algebras to compute a version of link Floer homology. As a corollary, we also give a fast computation of the Thuston polytope for links in the three-sphere.

Geometric Topology · Mathematics 2020-04-17 Peter Ozsvath , Zoltan Szabo