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This article presents a new and more elementary proof of the main Seiberg-Witten-based obstruction to the existence of Einstein metrics on smooth compact 4-manifolds. It also introduces a new smooth manifold invariant which conveniently…

Differential Geometry · Mathematics 2007-05-23 Claude LeBrun

We extend to the case of a $d$-dimensional compact connected oriented Riemannian manifold $\mathcal M$ the theorem of A. Bondarenko, D. Radchenko and M. Viazovska on the existence of $L$-designs consisting of $N$ nodes, for any $N\ge…

Analysis of PDEs · Mathematics 2021-09-08 Bianca Gariboldi , Giacomo Gigante

We shall prove a new non-vanishing theorem for the stable cohomotopy Seiberg-Witten invariant of connected sums of 4-manifolds with positive first Betti number. The non-vanishing theorem enables us to find many new examples of 4-manifolds…

Differential Geometry · Mathematics 2008-04-23 Masashi Ishida , Hirofumi Sasahira

We resolve a question of Fuchs and Tabachnikov by showing that there is a Legendrian knot in standard contact three-space with zero Maslov number which is not Legendrian isotopic to its mirror. The proof uses the differential graded…

Geometric Topology · Mathematics 2007-05-23 Lenhard L. Ng

We study moduli spaces of Seiberg-Witten monopoles over spin^c Riemannian 4-manifolds with long necks and/or tubular ends. This first part discusses compactness, exponential decay, and transversality. As applications we prove two vanishing…

Differential Geometry · Mathematics 2014-11-11 Kim A Froyshov

Helmut Hofer introduced in '93 a novel technique based on holomorphic curves to prove the Weinstein conjecture. Among the cases where these methods apply are all contact 3--manifolds $(M,\xi)$ with $\pi_2(M) \ne 0$. We modify Hofer's…

Dynamical Systems · Mathematics 2012-02-01 Klaus Niederkrüger , Ana Rechtman

We generalize Witten's conjectured formula relating Donaldson and Seiberg-Witten invariants to manifolds of non-simple type, via equivariant localization techniques. This approach does not use the theory of non-abelian monopoles, but works…

High Energy Physics - Theory · Physics 2007-05-23 Adrian Vajiac

We investigate an equivalence relation on Legendrian knots in the standard contact three-space defined by the existence of an interpolating zigzag of Lagrangian cobordisms. We compare this relation, restricted to genus-$0$ surfaces, to…

Symplectic Geometry · Mathematics 2023-08-07 Joshua M. Sabloff , David Shea Vela-Vick , C. -M. Michael Wong , Angela Wu

We compute in many classes of examples the first potentially interesting homotopy group of the space of embeddings of either an arc or a circle into a manifold $M$ of dimension $d\geq4$. In particular, if $M$ is a simply connected…

Geometric Topology · Mathematics 2025-10-08 Danica Kosanović

In the present work some geometric and topological implications of noncommutative Wilson loops are explored via the Seiberg-Witten map. In the abelian Chern-Simons theory on a three dimensional manifold, it is shown that the effect of…

High Energy Physics - Theory · Physics 2015-09-23 H. García-Compeán , O. Obregón , R. Santos-Silva

We study the invariants of surfaces in 4-manifolds extracted from the Seiberg-Witten and the Ozsvath-Szabo invariants of their fiber sums with auxiliary Lefschetz fibrations. Such invariants involve relative Spin_c structures and can be…

Geometric Topology · Mathematics 2007-05-23 Sergey Finashin

We show that there exists an infinite family of pairwise non-isotopic Legendrian knots in the standard contact 3-sphere whose Stein traces are equivalent. This is the first example of such phenomenon. Different constructions are developed…

Symplectic Geometry · Mathematics 2026-02-10 Roger Casals , John Etnyre , Marc Kegel

We use rudiments of the Seiberg-Witten gluing theory for trivial circle bundles over a Riemann surface to relate de Seiberg-Witten basic classes of two $4$-manifolds containing Riemann surfaces of the same genus and self-intersection zero…

dg-ga · Mathematics 2008-02-03 Vicente Muñoz

Main interest of the present paper is to obtain the generalized Wintgen inequality for Legendrian submanifolds in almost Kenmotsu manifolds.

Differential Geometry · Mathematics 2018-06-26 R. Gorunus , I. Kupeli Erken , A. Yazla , C. Murathan

In this paper we consider Riemannian manifolds of dimension at least $3$, with nonnegative Ricci curvature and Euclidean Volume Growth. For every open bounded subset with smooth boundary we establish the validity of an optimal Minkowski…

Differential Geometry · Mathematics 2024-11-06 Luca Benatti , Mattia Fogagnolo , Lorenzo Mazzieri

Witten introduced classical Chern-Simons theory to topology in 1989, when he defined an invariant for knots in 3-manifolds by an integral over a certain infinite-dimensional space, which up to today have not been entirely understood.…

Geometric Topology · Mathematics 2022-07-25 Benjamin Himpel

We formulate a very general conjecture relating the analytical invariants of a normal surface singularity to the Seiberg-Witten invariants of its link provided that the link is a rational homology sphere. As supporting evidence, we…

Algebraic Geometry · Mathematics 2014-11-11 Andras Nemethi , Liviu I Nicolaescu

In this paper, the support genus of all Legendrian right handed trefoil knots and some other Legendrian knots is computed. We give examples of Legendrian knots in the three-sphere with the standard contact structure which have positive…

Geometric Topology · Mathematics 2011-01-28 Youlin Li , Jiajun Wang

The paper is a summary of the results of the authors concerning computations of symplectic invariants of Weinstein manifolds and contains some examples and applications. Proofs are sketched. The detailed proofs will appear in our…

Symplectic Geometry · Mathematics 2011-03-10 Frédéric Bourgeois , Tobias Ekholm , Yakov Eliashberg

We solve a conjecture of Morgan and Szabo (Embedded genus 2 surfaces in four-manifolds, Preprint) about the relationship of the basic classes of two four-manifolds $X_i$ of simple type with $b_1=0$, $b^+>1$, such that there are embedded…

dg-ga · Mathematics 2008-02-03 Vicente Munoz