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Let f be an isolated plane curve singularity with Milnor fiber of genus at least 5. For all such f, we give (a) an intrinsic description of the geometric monodromy group that does not invoke the notion of the versal deformation space, and…

Geometric Topology · Mathematics 2021-12-08 Pablo Portilla Cuadrado , Nick Salter

We consider the topology for a class of hypersurfaces with highly nonisolated singularites which arise as exceptional orbit varieties of a special class of prehomogeneous vector spaces, which are representations of linear algebraic groups…

Algebraic Geometry · Mathematics 2015-12-31 James Damon

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 a new Floer theory associated to a pair consisting of a Cartan hypercontact 3-manifold M and a hyperkaehler manifold X.

Symplectic Geometry · Mathematics 2008-08-07 Sonja Hohloch , Gregor Noetzel , Dietmar Salamon

There is a classical relationship in algebraic geometry between a hyperelliptic curve and an associated pencil of quadric hypersurfaces. We investigate symplectic aspects of this relationship, with a view to applications in low-dimensional…

Symplectic Geometry · Mathematics 2011-10-14 Ivan Smith

On the category of pairs of topological spaces having a homotopy type of $CW$ complexes the singular (co)homology theory was axiomatically studied by J.Milnor. In particular, Milnor gave additivity axiom for a (co)homology theory and proved…

Algebraic Topology · Mathematics 2019-11-14 Anzor Beridze , Leonard Mdzinarishvili

We construct Hamiltonian Floer complexes associated to continuous, and even lower semi-continuous, time dependent exhaustion functions on geometrically bounded symplectic manifolds. We further construct functorial continuation maps…

Symplectic Geometry · Mathematics 2023-06-21 Yoel Groman

This article and its successor concern the topology of real isolated hypersurface singularities. We prove that after attaching a certain number of handles the real Milnor fibres become contractible, with each handle corresponding to a…

Algebraic Geometry · Mathematics 2021-10-12 Lars Andersen

In this article, we study the Hamiltonian dynamics on singular symplectic manifolds and prove the Arnold conjecture for a large class of $b^m$-symplectic manifolds. Novel techniques are introduced to associate smooth symplectic forms to the…

Symplectic Geometry · Mathematics 2025-09-01 Joaquim Brugués , Eva Miranda , Cédric Oms

We compute the symplectic cohomology of Milnor fibers of isolated quasihomogeneous cAn singularities . In addition, we use our computations to distinguish their links as contact manifolds and to provide further evidence to a conjecture of…

Symplectic Geometry · Mathematics 2024-07-12 Nikolas Adaloglou , Federica Pasquotto , Aline Zanardini

In this article we define intersection Floer homology for exact Lagrangian cobordisms between Legendrian submanifolds in the contactisation of a Liouville manifold, provided that the Chekanov-Eliashberg algebras of the negative ends of the…

Symplectic Geometry · Mathematics 2025-02-07 Baptiste Chantraine , Georgios Dimitroglou Rizell , Paolo Ghiggini , Roman Golovko

We define a notion of Heegaard Floer homology for three dimensional orbifolds with arbitrary cyclic singularities, generalizing the recent work of Biji Wong where the singular locus is assumed to be connected.

Geometric Topology · Mathematics 2024-02-14 Saibal Ganguli , Mainak Poddar

The Floer homology of a cotangent bundle is isomorphic to loop space homology of the underlying manifold, as proved by Abbondandolo-Schwarz, Salamon-Weber, and Viterbo. In this paper we show that in the presence of a Dirac magnetic monopole…

Symplectic Geometry · Mathematics 2012-01-24 Urs Frauenfelder , Will J. Merry , Gabriel P. Paternain

We study exact orbifold fillings of contact manifolds using Floer theories. Motivated by Chen-Ruan's orbifold Gromov-Witten invariants, we define symplectic cohomology of an exact orbifold filling as a group using classical techniques, i.e.…

Symplectic Geometry · Mathematics 2021-11-23 Fabio Gironella , Zhengyi Zhou

By applying Seifert's algorithm to a special alternating diagram of a link L, one obtains a Seifert surface F of L. We show that the support of the sutured Floer homology of the sutured manifold complementary to F is affine isomorphic to…

Geometric Topology · Mathematics 2013-10-18 András Juhász , Tamás Kálmán , Jacob Rasmussen

The dimensions of the graded quotients of the cohomology of a plane curve complement with respect to the Hodge filtration are described in terms of simple geometrical invariants. The case of curves with ordinary singularities is discussed…

Algebraic Geometry · Mathematics 2019-08-15 Nancy Abdallah

Various Seiberg-Witten Floer cohomologies are defined for a closed, oriented 3-manifold; and if it is the mapping torus of an area-preserving surface automorphism, it has an associated periodic Floer homology as defined by Michael…

Geometric Topology · Mathematics 2011-05-24 Yi-Jen Lee , Clifford Henry Taubes

Area-preserving diffeomorphisms of a 2-disc can be regarded as time-1 maps of (non-autonomous) Hamiltonian flows on solid tori, periodic flow-lines of which define braid (conjugacy) classes, up to full twists. We examine the dynamics…

Dynamical Systems · Mathematics 2009-10-06 J. -B. van den Berg , R. Ghrist , R. Vandervorst , W. Wojcik

We prove that the rank of the cohomology of a closed symplectic manifold with coefficients in a field of characteristic $p$ is smaller than the number of periodic orbits of any non-degenerate Hamiltonian flow. Following Floer, the proof…

Symplectic Geometry · Mathematics 2021-03-03 Mohammed Abouzaid , Andrew J. Blumberg

We consider Lagrangian Floer cohomology for a pair of Lagrangian submanifolds in a symplectic manifold M. Suppose that M carries a symplectic involution, which preserves both submanifolds. Under various topological hypotheses, we prove a…

Symplectic Geometry · Mathematics 2010-08-24 Paul Seidel , Ivan Smith