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We give a general survey of the solution of the Einstein constraints by the conformal method on n dimensional compact manifolds. We prove some new results about solutions with low regularity (solutions in $H_{2}$ when n=3), and solutions…

General Relativity and Quantum Cosmology · Physics 2008-11-26 Yvonne Choquet-Bruhat

We show that for all $n \ge 3$, any $(2n+1)$-dimensional manifold that admits a tight contact structure, also admits a tight but non-fillable contact structure, in the same almost contact class. For $n=2$, we obtain the same result,…

Symplectic Geometry · Mathematics 2026-03-17 Jonathan Bowden , Fabio Gironella , Agustin Moreno , Zhengyi Zhou

We propose a natural generalization of a conjecture by Garsia, originally concerning the realization of conformal classes of genus-1 surfaces via embeddings in three-dimensional Euclidean space. This generalized conjecture is formulated…

Differential Geometry · Mathematics 2025-07-31 Leonardo A. Cano García

Weinstein trisection is a trisection of a symplectic 4-manifold whose 1-handlebodies are the Weinstein domain for the symplectic structure induced from an ambient manifold. Lambert-Cole, Meier, and Starkston showed that every closed…

Geometric Topology · Mathematics 2023-09-22 Masaki Ogawa

We prove the Weinstein conjecture for non-trivial contact connected sums under either of two topological conditions: non-trivial fundamental group or torsion-free homology.

Symplectic Geometry · Mathematics 2019-03-12 Hansjörg Geiges , Kai Zehmisch

We show that an oriented elliptic 3-manifold admits a universally tight positive contact structure iff the corresponding group of deck transformations on $S^3$ preserves a standard contact structure pointwise. We also relate univerally…

Geometric Topology · Mathematics 2007-05-23 Siddhartha Gadgil

This is an introduction to Taubes's proof of the Weinstein conjecture, written for the AMS Current Events Bulletin. It is intended to be accessible to nonspecialists, so much of the article is devoted to background and context.

Symplectic Geometry · Mathematics 2009-09-23 Michael Hutchings

In "Proof of the Arnold chord conjecture in three dimensions I", we deduced the Arnold chord conjecture in three dimensions from another result, which asserts that an exact symplectic cobordism between contact three-manifolds induces a map…

Symplectic Geometry · Mathematics 2014-11-11 Michael Hutchings , Clifford Henry Taubes

We prove that there exists at least one close orbit in a given contact hypersurface in some symplectic manifolds.

Symplectic Geometry · Mathematics 2007-05-23 Renyi Ma

Using a mixture of classical and probabilistic techniques we investigate the convexity of solutions to the elliptic pde associated with a certain generalized Ornstein-Uhlenbeck process.

Analysis of PDEs · Mathematics 2014-07-16 Jon Warren

In this paper we show the validity, under certain geometric conditions, of Wheeler's thin sandwich conjecture for higher dimensional theories of gravity. We extend the results shown by R. Bartnik and G. Fodor for the 3-dimensional case in…

General Relativity and Quantum Cosmology · Physics 2017-11-03 R. Avalos , F. Dahia , C. Romero , J. H. Lira

Musta\c{t}\u{a} has given a conjecture for the graded Betti numbers in the minimal free resolution of the ideal of a general set of points on an irreducible projective algebraic variety. For surfaces in $\mathbb P^3$ this conjecture has…

Commutative Algebra · Mathematics 2018-05-29 Mats Boij , Juan C. Migliore , Rosa María Miró-Roig , Uwe Nagel

We give an proof on the Weinstein conjecture on the cotangent bundles of open manifolds. Its proof is based on Gromov's nonlinear Fredholm alternative.

Symplectic Geometry · Mathematics 2007-05-23 Renyi Ma

We prove that closed connected contact manifolds of dimension $\geq 5$ related by an h-cobordism with a flexible Weinstein structure become contactomorphic after some kind of stabilization. We also provide examples of non-conjugate contact…

Symplectic Geometry · Mathematics 2016-09-27 Sylvain Courte

We established existence of periodic Reeb orbits for a large class of tight contact structures on closed 3-manifolds, notably the Stein fillable structures, based on a fundamental theorem of Cliff Taubes on symplectic 4-manifolds.

dg-ga · Mathematics 2008-02-03 Weimin Chen

We study invariants defined by count of charged, elliptic $J$-holomorphic curves in locally conformally symplectic manifolds. We use this to define $\mathbb{Q} $-valued deformation invariants of certain complete Riemann-Finlser manifolds…

Symplectic Geometry · Mathematics 2023-10-17 Yasha Savelyev

Twists of contact structures in dimension 3 and higher are studied in this paper from a viewpoint of contact round surgery. Three kinds of new modifications of contact structures which are higher-dimensional generalizations of the…

Geometric Topology · Mathematics 2016-11-01 Jiro Adachi

The goal of this article is to survey recent developments in the theory of contact structures in dimension three.

Geometric Topology · Mathematics 2007-05-23 Ko Honda

We show the existence of a contractible periodic Reeb orbit for any contact structure supported by an open book whose binding can be realised as a hypersurface of restricted contact type in a subcritical Stein manifold. A key ingredient in…

Symplectic Geometry · Mathematics 2019-03-11 Max Dörner , Hansjörg Geiges , Kai Zehmisch

A pseudo-Einstein contact form plays a crucial role in defining some global invariants of closed strictly pseudoconvex CR manifolds. In this paper, we prove that the existence of a pseudo-Einstein contact form is preserved under…

Differential Geometry · Mathematics 2020-01-22 Yuya Takeuchi