Heegaard Floer homology and alternating knots

Ozsváth, Peter¹ ; Szabó, Zoltán²

¹ Department of Mathematics, Columbia University, New York 10027, USA
² Department of Mathematics, Princeton University, New Jersey 08540, USA

Geometry & topology, Tome 7 (2003) no. 1, pp. 225-254.

Résumé

In an earlier paper, we introduced a knot invariant for a null-homologous knot $K$ in an oriented three-manifold $Y$, which is closely related to the Heegaard Floer homology of $Y$. In this paper we investigate some properties of these knot homology groups for knots in the three-sphere. We give a combinatorial description for the generators of the chain complex and their gradings. With the help of this description, we determine the knot homology for alternating knots, showing that in this special case, it depends only on the signature and the Alexander polynomial of the knot (generalizing a result of Rasmussen for two-bridge knots). Applications include new restrictions on the Alexander polynomial of alternating knots.

Détail

DOI : 10.2140/gt.2003.7.225

Keywords: alternating knots, Kauffman states, Floer homology

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