On the Thurston-Bennequin invariant of graph divide links

Details On the Thurston-Bennequin invariant of graph divide links On the Thurston-Bennequin invariant of graph divide links

2004-06-16

arxiv.org/abs/math/0406313v2

Mathematics

Geometric Topology

8 pages, 8 figures

Scientific paper

10.1017/S0305004105008741

In the present paper we determine the Thurston-Bennequin invariant of graph divide links, which include all closed positive braids, all divide links and certain negative twist knots. As a corollary of this and a result of P. Lisca and A.I. Stipsicz, we prove that the 3-manifold obtained from the 3-sphere by Dehn surgery along a non-trivial graph divide knot K with coefficient r carries positive, tight contact structures for every r except the Thurston-Bennequin invariant of K.

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