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The canonical-type connection on the almost contact manifolds with B-metric is constructed. It is proved that its torsion is invariant with respect to a subgroup of the general conformal transformations of the almost contact B-metric…

Differential Geometry · Mathematics 2014-04-15 Mancho Manev , Miroslava Ivanova

We develop the details of a surgery theory for contact manifolds of arbitrary dimension via convex structures, extending the 3-dimensional theory developed by Giroux. The theory is analogous to that of Weinstein manifolds in symplectic…

Symplectic Geometry · Mathematics 2019-05-29 Kevin Sackel

A contact foliation is a foliation endowed with a leafwise contact structure. In this remark we explain a turbulisation procedure that allows us to prove that tightness is not a homotopy invariant property for contact foliations.

Symplectic Geometry · Mathematics 2017-09-13 Álvaro del Pino

Examples of nonformal simply connected symplectic manifolds are constructed.

Symplectic Geometry · Mathematics 2007-05-23 Ivan K. Babenko , Iskander A. Taimanov

We construct (infinitely many) examples in all dimensions of contactomorphisms of closed overtwisted contact manifolds that are smoothly isotopic but not contact-isotopic to the identity.

Symplectic Geometry · Mathematics 2019-05-29 Fabio Gironella

According to Giroux, contact manifolds can be described as open books whose pages are Stein manifolds. For 5-dimensional contact manifolds the pages are Stein surfaces, which permit a description via Kirby diagrams. We introduce handle…

Symplectic Geometry · Mathematics 2014-02-26 Fan Ding , Hansjörg Geiges , Otto van Koert

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

We make some elementary observations concerning subcritically Stein fillable contact structures on 5-manifolds. Specifically, we determine the diffeomorphism type of such contact manifolds in the case the fundamental group is finite cyclic,…

Geometric Topology · Mathematics 2019-08-15 Fan Ding , Hansjörg Geiges , Guangjian Zhang

We survey what is known about various special types of submanifolds of contact manifolds and discuss their role in the development of contact geometry.

Symplectic Geometry · Mathematics 2025-10-08 John B. Etnyre

Following T.-J. Li, W. Zhang [Comparing tamed and compatible symplectic cones and cohomological properties of almost complex manifolds, Comm. Anal. Geom.], we continue to study the link between the cohomology of an almost-complex manifold…

Differential Geometry · Mathematics 2012-11-28 Daniele Angella , Adriano Tomassini

In this note we study contact structures on 5-dimensional manifolds. We give a complete answer under the assumption that the Abundance conjecture holds in dimension 5.

Algebraic Geometry · Mathematics 2007-05-23 Stéphane Druel

We introduce the classes of holomorphic $p$-contact manifolds and holomorphic $s$-symplectic manifolds that generalise the classical holomorphic contact and holomorphic symplectic structures. After observing their basic properties and…

Differential Geometry · Mathematics 2025-11-18 Hisashi Kasuya , Dan Popovici , Luis Ugarte

We show that, under a certain condition, contact 5-manifolds can `coarsely' distinguish smooth structures on compact Stein 4-manifolds via contact open books. We also give a simple sufficient condition for an infinite family of Stein…

Geometric Topology · Mathematics 2016-04-13 Kouichi Yasui

This paper corresponds to Section 8 of arXiv:1912.05774v3 [math.GT]. The contents until Section 7 are published in Annali di Matematica Pura ed Applicata as a separate paper. In that paper, it is proved that for any positive flow-spine P of…

Geometric Topology · Mathematics 2023-04-20 Ippei Ishii , Masaharu Ishikawa , Yuya Koda , Hironobu Naoe

We formulate the non-commutative integrability of contact systems on a contact manifold $(M,\mathcal H)$ using the Jacobi structure on the space of sections $\Gamma(L)$ of a contact line bundle $L$. In the cooriented case, if the line…

Symplectic Geometry · Mathematics 2025-06-13 Bozidar Jovanovic

We study a cone structure ${\mathcal C} \subset {\mathbb P} D$ on a holomorphic contact manifold $(M, D \subset T_M)$ such that each fiber ${\mathcal C}_x \subset {\mathbb P} D_x$ is isomorphic to a Legendrian submanifold of fixed…

Differential Geometry · Mathematics 2020-10-22 Jun-Muk Hwang

Often it is possible to equip the space of all cone geodesics of a strongly convex cone structure with the structure of a smooth contact manifold. This generalizes the analogous notions for the space of light rays of a Lorentzian spacetime.…

Differential Geometry · Mathematics 2025-12-24 Jakob Hedicke

In this paper, we show that any compact manifold that carries a SL(n;R)-foliation is fibered on the circle S^1.

Differential Geometry · Mathematics 2017-12-05 Ameth Ndiaye

We lay the foundations of convex hypersurface theory in contact topology, extending the work of Giroux in dimension three. Specifically, we prove that any closed hypersurface in a contact manifold can be $C^0$-approximated by a convex one.…

Symplectic Geometry · Mathematics 2026-04-30 Joseph Breen , Austin Christian , Ko Honda , Yang Huang

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
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