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We classify the real tight contact structures on solid tori up to equivariant contact isotopy and apply the results to the classification of real tight structures on $S^3$ and real lens spaces $L(p,\pm 1)$. We prove that there is a unique…

Geometric Topology · Mathematics 2025-08-25 Sinem Onaran , Ferit Öztürk

We consider the question of when is the closed manifold obtained by elementary surgery on an $n$-knot Seifert fibred over a 2-orbifold. After some observations on the classical case, we concentrate on the cases n=2 and 3. We have found a…

Geometric Topology · Mathematics 2021-02-24 J. A. Hillman , J. Howie

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

We find an infinite family of Seifert fibered surgeries on strongly invertible knots which do not have primitive/Seifert positions. Each member of the family is obtained from a trefoil knot after alternate twists along a pair of seiferters…

Geometric Topology · Mathematics 2014-07-22 Mario Eudave-Munoz , Edgar Jasso , Katura Miyazaki , Kimihiko Motegi

Contact structures on 3-manifolds are analyzed by decomposing the manifold along convex surfaces. Background results of Giroux, Eliashberg, Colin, and Honda are discussed with an emphasis on examples. Convex decompositions are then used to…

Geometric Topology · Mathematics 2007-05-23 William H. Kazez

We characterize the oriented Seifert-fibered three-manifolds which admit positive, transverse contact structures.

Symplectic Geometry · Mathematics 2014-10-01 Paolo Lisca , Gordana Matic

We study compatible contact structures of fibered Seifert multilinks in homology 3-spheres and especially give a necessary and sufficient condition for the contact structure to be tight in the case where the Seifert fibration is positively…

Geometric Topology · Mathematics 2010-11-30 Masaharu Ishikawa

In this note, we show that transverse knots have unique standard neighborhoods and prove a structure theorem about non-loose Legendrian knots. We also prove a finiteness result for transverse knots in a tight contact manifold. The common…

Geometric Topology · Mathematics 2026-05-06 John B. Etnyre

In this paper we prove a vanishing theorem for the contact Ozsvath--Szabo invariants of certain contact 3--manifolds having positive Giroux torsion. We use this result to establish similar vanishing results for contact structures with…

Symplectic Geometry · Mathematics 2007-05-23 Paolo Lisca , Andras I. Stipsicz

We exhibit tight contact structures on 3-manifolds that do not admit any symplectic fillings.

Geometric Topology · Mathematics 2007-05-23 John B. Etnyre , Ko Honda

We extend the Heegaard Floer homological definition of spectral order for closed contact 3-manifolds due to Kutluhan, Mati\'c, Van Horn-Morris, and Wand to contact 3-manifolds with convex boundary. We show that the order of a codimension…

Geometric Topology · Mathematics 2018-10-24 András Juhász , Sungkyung Kang

We show that certain classes of contact 3-manifolds do not admit non-separating contact type embeddings into any closed symplectic 4-manifolds, e.g. this is the case for all contact manifolds that are (partially) planar or have Giroux…

Symplectic Geometry · Mathematics 2010-05-02 Peter Albers , Barney Bramham , Chris Wendl

We establish constraints on the topology of smooth Lefschetz fibrations with $4$-dimensional fibers, by studying the family Bauer-Furuta invariant. To compute this invariant, we analyze the framed bordism class of 1-dimensional…

Geometric Topology · Mathematics 2025-11-04 Hokuto Konno , Jianfeng Lin , Anubhav Mukherjee , Juan Muñoz-Echániz

We classify all contact structures with contact surgery number one on the Brieskorn sphere Sigma(2,3,11) with both orientations. We conclude that there exist infinitely many non-isotopic contact structures on each of the above manifolds…

Symplectic Geometry · Mathematics 2024-04-30 Rima Chatterjee , Marc Kegel

We consider complements of standard Seifert surfaces of special alternating links. On these handlebodies, we use Honda's method to enumerate those tight contact structures whose dividing sets are isotopic to the link, and find their number…

Geometric Topology · Mathematics 2020-03-25 Tamás Kálmán , Daniel V. Mathews

We classify Legendrian torus knots and figure eight knots in the tight contact structure on the 3-sphere up to Legendrian isotopy. As a corollary to this we also obtain the classification of transversal torus knots and figure eight knots up…

Geometric Topology · Mathematics 2007-05-23 John B. Etnyre , Ko Honda

These notes provide an introduction to Giroux's theory of convex surfaces in contact 3-manifolds and its simplest applications. They put a special emphasis on pictures and discussions of explicit examples. The first goal is to explain why…

Geometric Topology · Mathematics 2013-03-06 Patrick Massot

We give finiteness results and some classifications up to diffeomorphism of minimal strong symplectic fillings of Seifert fibered spaces over S^2 satisfying certain conditions, with a fixed natural contact structure. In some cases we can…

Geometric Topology · Mathematics 2015-08-18 Laura Starkston

In this paper, we develop the theory for classifying all the geometric fibrations of compact, connected, flat $n$-orbifolds, over a 1-orbifold, up to affine equivalence. We apply our classification theory to classify all the geometric…

Geometric Topology · Mathematics 2020-05-08 John G. Ratcliffe , Steven T. Tschantz

It is known that any contact 3-manifold can be obtained by rational contact Dehn surgery along a Legendrian link L in the standard tight contact 3-sphere. We define and study various versions of contact surgery numbers, the minimal number…

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