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2014 | OriginalPaper | Buchkapitel

Geometric Decompositions of Almost Contact Manifolds

verfasst von : Francisco Presas

Erschienen in: Contact and Symplectic Topology

Verlag: Springer International Publishing

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Abstract

These notes are intended to be an introduction to the use of approximately holomorphic techniques in almost contact and contact geometry. We develop the setup of the approximately holomorphic geometry. Once done, we sketch the existence of the two main geometric decompositions available for an almost contact or contact manifold: open books and Lefschetz pencils. The use of the two decompositions for the problem of existence of contact structures is mentioned.

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Fußnoten
1
Just once and for all it is important to mention that all the results in these notes can be easily adapted to the non-coorientable case. The essential point being that any non-coorientable contact manifold admits a coorientable double-cover. Therefore to study non-coorientable manifolds is reduced to study coorientable ones with free \(\mathbb {Z}/2\mathbb {Z}\)-actions. See [21] for details.
 
2
The normal bundle TM/ξ of ξ as a subbundle of TM is trivial.
 
3
The maximum angle between two subspaces \(U,V \subset \mathbb {R}^{m}\) of the Euclidean space is by definition ∠ M (U,V)=max uU {∠(u,V)}.
 
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Metadaten
Titel
Geometric Decompositions of Almost Contact Manifolds
verfasst von
Francisco Presas
Copyright-Jahr
2014
DOI
https://doi.org/10.1007/978-3-319-02036-5_4

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