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We characterize L-spaces which are Seifert fibered over the 2-sphere in terms of taut foliations, transverse foliations and transverse contact structures. We give a sufficient condition for certain contact Seifert fibered 3-manifolds with…

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

We determine the closed, oriented Seifert fibered 3-manifolds which carry positive tight contact structures. Our main tool is a new non-vanishing criterion for the contact Ozsvath-Szabo invariant.

Symplectic Geometry · Mathematics 2019-12-19 Paolo Lisca , Andras I. Stipsicz

We classify tight contact structures on the small Seifert fibered 3--manifold M(-1; r_1, r_2, r_3) with r_i in (0,1) and r_1, r_2 \geq 1/2. The result is obtained by combining convex surface theory with computations of contact…

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

We classify positive, tight contact structures on closed Seifert fibered 3-manifolds with base S^2, three singular fibers and e_0\geq 0.

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

In this article we present infinitely many 3-manifolds admitting infinitely many universally tight contact structures each with trivial Ozsvath-Szabo contact invariants. By known properties of these invariants the contact structures…

Geometric Topology · Mathematics 2009-03-03 Paolo Ghiggini

We compute the Ozsv\'ath--Szab\'o contact invariants for all tight contact structures on the manifolds -\Sigma(2,3,6n-1).

Geometric Topology · Mathematics 2013-12-30 Paolo Ghiggini , Jeremy Van Horn-Morris

Using contact surgery we define families of contact structures on certain Seifert fibered three-manifolds. We prove that all these contact structures are tight using contact Ozsath-Szabo invariants. We use these examples to show that, given…

Symplectic Geometry · Mathematics 2014-10-01 Paolo Lisca , Andras I. Stipsicz

In this article we provide an infinite family of weakly symplectically fillable contact structures with trivial Ozsvath-Szabo contact invariants over Z/2Z. As a consequence of this fact, we show how Heegaard-Floer theory can distinguish…

Geometric Topology · Mathematics 2007-05-23 Paolo Ghiggini

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

Let S^3_r(K) be the oriented 3--manifold obtained by rational r-surgery on a knot K in S^3. Using the contact Ozsvath-Szabo invariants we prove, for a class of knots K containing all the algebraic knots, that S^3_r(K) carries positive,…

Symplectic Geometry · Mathematics 2014-11-11 Paolo Lisca , Andras I Stipsicz

We study some properties of transverse contact structures on small Seifert manifolds, and we apply them to the classification of tight contact structures on a family of small Seifert manifolds.

Geometric Topology · Mathematics 2007-10-10 Paolo Ghiggini

We classify up to isotopy the tight contact structures on small Seifert spaces with $e_0\neq0,-1,-2$. (The first version contains on the $e_0<-2$ case.)

Geometric Topology · Mathematics 2007-05-23 Hao Wu

We prove some classification results for tight contact structure in the 3-space, -ball and -sphere that are invariant with respect to some arbitrary involution, that is conjugated to the standard rotation around the x-axis. Unlike the…

Geometric Topology · Mathematics 2026-01-21 Mirko Torresani

Ozsvath-Szabo contact invariants are a powerful way to prove tightness of contact structures but they are known to vanish in the presence of Giroux torsion. In this paper we construct, on infinitely many manifolds, infinitely many isotopy…

Geometric Topology · Mathematics 2009-12-31 Patrick Massot

We classify tight contact structures with zero Giroux torsion on some Seifert-fibered manifolds with four exceptional fibers. We get the lower bound by constructing contact structures using Legendrian surgery. We use convex surface theory…

Geometric Topology · Mathematics 2025-04-04 Tanushree Shah

In this article we classify up to isotopy tight contact structures on Seifert manifolds over the torus with one singular fibre.

Geometric Topology · Mathematics 2014-10-01 Paolo Ghiggini

Recently, there have been several breakthroughs in the classification of tight contact structures. We give an outline on how to exploit methods developed by Ko Honda and John Etnyre to obtain classification results for specific examples of…

Geometric Topology · Mathematics 2007-05-23 P. Ghiggini , S. Schoenenberger

Using the knot Floer homology filtration, we define invariants associated to a knot in a three-manifold possessing non-vanishing Floer co(homology) classes. In the case of the Ozsvath-Szabo contact invariant we obtain an invariant of knots…

Geometric Topology · Mathematics 2007-08-06 Matthew Hedden

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 prove various results on contact structures obtained by contact surgery on a single Legendrian knot in the standard contact three--sphere. Our main tool are the contact Ozsvath--Szabo invariants.

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