Overtwisted open books from sobering arcs

Details Overtwisted open books from sobering arcs Overtwisted open books from sobering arcs

2004-07-24

arxiv.org/abs/math/0407420v2

Algebr. Geom. Topol. 5 (2005) 1173-1195

Mathematics

Geometric Topology

Published by Algebraic and Geometric Topology at http://www.maths.warwick.ac.uk/agt/AGTVol5/agt-5-47.abs.html

Scientific paper

We study open books on three manifolds which are compatible with an overtwisted contact structure. We show that the existence of certain arcs, called sobering arcs, is a sufficient condition for an open book to be overtwisted, and is necessary up to stabilization by positive Hopf-bands. Using these techniques we prove that some open books arising as the boundary of symplectic configurations are overtwisted, answering a question of Gay in Algebr. Geom. Topol. 3 (2003) 569--586.

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