martedi' 11-07-2006 (15:00) - Sala Seminari Gordana Matic' (University of Georgia, Athens) : On right-veering diffeomorphisms and contact class in Heegaard Floer homology

Abstract: We present an alternate deion of the Ozsv'ath-Szab'o contact class in Heegaard Floer homology. Using our deion of the contact class, we prove that if a contact structure $(M,\xi)$ has an adapted open book decomposition whose page $S$ is a once-punctured torus, then the monodromy is right-veering if and only if the contact structure is tight.

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