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Let M be the cotangent bundle of S^2, with the standard symplectic structure. By adapting an argument of Gromov we determine the weak homotopy type of the group S of those symplectic automorphisms of M which are trivial at infinity. It…

Differential Geometry · Mathematics 2007-05-23 Paul Seidel

In the large rank limit, for any nonexceptional affine algebra, the graded branching multiplicities known as one-dimensional sums, are conjectured to have a simple relationship with those of type A, which are known as generalized Kostka…

Combinatorics · Mathematics 2007-05-23 Mark Shimozono

This is the sequel to the author's previous paper which gives an extension of Taubes' "SW=Gr" theorem to non-symplectic 4-manifolds. The main result of this paper asserts the following. Whenever the Seiberg-Witten invariants are defined…

Differential Geometry · Mathematics 2023-03-22 Chris Gerig

We study the ergodic properties of Schr\"odinger operators on a compact connected Riemannian manifold $M$ without boundary in case that the underlying Hamiltonian system possesses certain symmetries. More precisely, let $M$ carry an…

Spectral Theory · Mathematics 2015-09-03 Benjamin Küster , Pablo Ramacher

In this paper we study certain algebraic properties of the quantum homology algebra for the class of symplectic toric Fano manifolds. In particular, we examine the semi-simplicity of the quantum homology algebra, and the more general…

Symplectic Geometry · Mathematics 2008-06-15 Yaron Ostrover , Ilya Tyomkin

Exponential convergence type results are proved for holomorphic curves in the symplectization of a contact manifold $Y$ with boundary on a Legendrian cylinder. The results are proven in all dimensions, and generalize earlier work specific…

Symplectic Geometry · Mathematics 2022-11-29 Dylan Cant

Let W be a smooth complex quasiprojective variety with the action of a connected reductive group G. Adapting the stratification approach of Teleman to a microlocal context, we prove a vanishing theorem for the functor of G-invariant…

Algebraic Geometry · Mathematics 2017-02-22 Kevin McGerty , Thomas Nevins

We show that noncompact simply connected harmonic manifolds with volume density $\Theta_{p}(r) =\sinh ^{n-1} r$ is isometric to the real hyperbolic space and noncompact simply connected K\"{a}hler harmonic manifold with volume density…

dg-ga · Mathematics 2008-02-03 K. Ramachandran , Akhil Ranjan

In this paper we describe a method to establish when a symplectic manifold $M$ with semi-free Hamiltonian $S^{1}$-action is unique up to isomorphism (equivariant symplectomorphism). This will rely on a study of the symplectic topology of…

Symplectic Geometry · Mathematics 2010-05-11 Eduardo Gonzalez

We extend a result of M. Katz on conformal systoles to all four-manifolds with b^+=1 which have odd intersection form. The same result holds for all four-manifolds with b^+=1 with even intersection form and which are symplectic or satisfy…

Differential Geometry · Mathematics 2009-07-16 M. J. D. Hamilton

The Arnold conjecture states that a Hamiltonian diffeomorphism of a closed and connected symplectic manifold must have at least as many fixed points as the minimal number of critical points of a smooth function on the manifold. It is well…

Symplectic Geometry · Mathematics 2018-08-30 Lev Buhovsky , Vincent Humilière , Sobhan Seyfaddini

In this paper we provide a criterion for the quasi-autonomous Hamiltonian path (``Hofer's geodesic'') on arbitrary closed symplectic manifolds $(M,\omega)$ to be length minimizing in its homotopy class in terms of the spectral invariants…

Symplectic Geometry · Mathematics 2007-05-23 Yong-Geun Oh

The standard topological censorship theorems require asymptotic hypotheses which are too restrictive for several situations of interest. In this paper we prove a version of topological censorship under significantly weaker conditions,…

General Relativity and Quantum Cosmology · Physics 2009-09-29 Piotr T. Chruściel , Gregory J. Galloway , Didier Solis

We prove that on closed Riemannian manifolds with infinite abelian, but not cyclic, fundamental group, any isometry that is homotopic to the identity possesses infinitely many invariant geodesics. We conjecture that the result remains true…

Differential Geometry · Mathematics 2015-05-13 Marco Mazzucchelli

In this paper, we gave some explicit relations between absolute and relative Gromov-Witten invariants. We proved that a symplectic manifold is symplectic rationally connected if it contains a positive divisor symplectomorphic to $P^n$.

Symplectic Geometry · Mathematics 2008-02-06 Jianxun Hu , Yongbin Ruan

We prove the semisimplicity conjecture for A-motives over finitely generated fields K. This conjecture states that the rational Tate modules V_p(M) of a semisimple A-motive M are semisimple as representations of the absolute Galois group of…

Number Theory · Mathematics 2019-02-20 Nicolas Stalder

A symplectic manifold is called symplectic rationally connected if there is a non-zero genus zero Gromov-Witten invariant with two point insertions. It is conjectured that every smooth projective rationally connected variety is symplectic…

Algebraic Geometry · Mathematics 2012-08-24 Zhiyu Tian

In this paper we provide the classification of tight contact structures on some small Seifert fibered manifolds. As an application of this classification, combined with work of Lekili in \cite{L2010}, we obtain infinitely many…

Geometric Topology · Mathematics 2020-03-11 Bulent Tosun

We formulate a Crepant Resolution Correspondence for open Gromov-Witten invariants (OCRC) of toric Calabi-Yau orbifolds by viewing the open theories as sections of Givental's symplectic vector space and the correspondence as a linear map of…

Algebraic Geometry · Mathematics 2014-04-15 Andrea Brini , Renzo Cavalieri , Dustin Ross

We recently defined an invariant of contact manifolds with convex boundary in Kronheimer and Mrowka's sutured monopole Floer homology theory. Here, we prove that there is an isomorphism between sutured monopole Floer homology and sutured…

Symplectic Geometry · Mathematics 2021-05-21 John A. Baldwin , Steven Sivek