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Linearized Legendrian contact homology (LCH) and bilinearized LCH are important homological invariants for Legendrian submanifolds in contact geometry. For legendrian knots in $\mathbb{R}^3$, very little was previously known about the…

Symplectic Geometry · Mathematics 2025-10-28 Frédéric Bourgeois , Salammbo Connolly

Unlike Legendrian submanifolds, the deformation problem of coisotropic submanifolds can be obstructed. Starting from this observation, we single out in the contact setting the special class of integral coisotropic submanifolds as the direct…

Differential Geometry · Mathematics 2018-02-20 Alfonso Giuseppe Tortorella

We introduce the notion of contact round surgery of index $1$ on Legendrian knots in a general contact 3-manifold. It generalizes the notion of contact round surgery of index 1 on Legendrian knots introduced by Adachi. In…

Symplectic Geometry · Mathematics 2025-12-29 Prerak Deep , Dheeraj Kulkarni

We classify convex disks with a fixed characteristic foliation and Legendrian boundary, up to contact isotopy relative to the boundary, in every closed overtwisted contact 3-manifold. This classification covers cases where the neighborhood…

Geometric Topology · Mathematics 2025-01-17 Dahyana Farias , Eduardo Fernández , Francisco Presas , Guillermo Sánchez-Arellano

This paper begins the study of relations between Riemannian geometry and global properties of contact structures on 3-manifolds. In particular we prove an analog of the sphere theorem from Riemannian geometry in the setting of contact…

Symplectic Geometry · Mathematics 2015-09-14 John B. Etnyre , Rafal Komendarczyk , Patrick Massot

In this paper, we study confoliations in dimensions higher than three mostly from the perspective of symplectic fillability. Our main result is that Massot-Niederkr\"uger-Wendl's bordered Legendrian open book, an object that obstructs the…

Symplectic Geometry · Mathematics 2024-12-03 Robert Cardona , Fabio Gironella

We execute Avdek's algorithm to find many algebraically overtwisted and tight $3$-manifolds by contact $+1$ surgeries. In particular, we show that a contact $1/k$ surgery on the standard contact $3$-sphere along any positive torus knot with…

Symplectic Geometry · Mathematics 2024-11-01 Youlin Li , Zhengyi Zhou

We build handle decompositions of n-manifolds that encode given open book decompositions and describe handle slides that reveal new open book decompositions on the same underlying manifold, for $n \geq 3$. This recovers known stabilization…

Geometric Topology · Mathematics 2025-05-27 Chun-Sheng Hsueh

This paper presents a new proof of the Giroux Correspondence for tight contact $3$-manifolds using techniques from Heegaard splittings and convex surface theory. We introduce tight Heegaard splittings, which generalise the Heegaard…

Geometric Topology · Mathematics 2024-06-25 Joan Licata , Vera Vértesi

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

We show that a null-homologous transverse knot K in the complement of an overtwisted disk in a contact 3-manifold is the boundary of a Legendrian ribbon if and only if it possesses a Seifert surface S such that the self-linking number of K…

Geometric Topology · Mathematics 2007-08-09 S. Baader , K. Cieliebak , T. Vogel

For a given $g>0$, we construct a family of non-decomposable Lagrangian cobordisms of genus $g$ between (stabilized) Legendrian knots in the standard contact three-sphere. The main technique we use to obstruct decomposability is based on…

Symplectic Geometry · Mathematics 2025-11-14 Roman Golovko , Daniel Komárek

In this note we study several aspects of coisotropic submanifolds of a contact manifold. In particular we give a structure theorem for the singularity of the characteristic foliation of a coisotropic submanifold. Moreover we establish the…

Symplectic Geometry · Mathematics 2013-12-11 Yang Huang

We define a graph encoding the structure of contact surgery on contact 3-manifolds and analyze its basic properties and some of its interesting subgraphs.

Geometric Topology · Mathematics 2026-02-10 Marc Kegel , Sinem Onaran

It is known by A. Loi and R. Piergallini that a closed, oriented, smooth 3-manifold is Stein fillable if and only if it has a positive open book decomposition. In the present paper we will show that for every link L in a Stein fillable…

Geometric Topology · Mathematics 2007-05-23 Masaharu Ishikawa

We show that the presence of a plastikstufe induces a certain degree of flexibility in contact manifolds of dimension 2n+1>3. More precisely, we prove that every Legendrian knot whose complement contains a "nice" plastikstufe can be…

Symplectic Geometry · Mathematics 2014-11-11 Emmy Murphy , Klaus Niederkrüger , Olga Plamenevskaya , András I. Stipsicz

In this note, we classify Stein fillings of an infinite family of contact 3-manifolds up to diffeomorphism. Some contact 3-manifolds in this family can be obtained by Legendrian surgeries on $(S^3,\xi_{std})$ along certain Legendrian…

Geometric Topology · Mathematics 2015-01-08 Amey Kaloti , Youlin Li

We describe Milnor open books and Legendrian surgery diagrams for canonical contact structures of links of some rational surface singularities. We also describe an infinite family of Milnor fillable contact 3-manifolds so that the Milnor…

Geometric Topology · Mathematics 2017-01-05 Mohan Bhupal , Burak Ozbagci

We give an $h$--principle type result for a class of Legendrian embeddings in contact manifolds of dimension at least $5$. These Legendrians, referred to as loose, have trivial pseudo-holomorphic invariants. We demonstrate they are…

Symplectic Geometry · Mathematics 2019-03-13 Emmy Murphy

The main purpose of this article is to classify contact structures on some 3-manifolds, namely lens spaces, most torus bundles over a circle, the solid torus, and the thickened torus T^2 x [0,1]. This classification completes earlier work…

Geometric Topology · Mathematics 2009-10-31 Emmanuel Giroux