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Legendrian links and the spanning tree model for Khovanov homology

Hao Wu

Algebraic & Geometric Topology 6 (2006) 1745–1757

arXiv: math.GT/0605630

Abstract

We use the spanning tree model for Khovanov homology to study Legendrian links. This leads to an alternative proof for Ng’s Khovanov bound for the Thurston–Bennequin number and to both a necessary and a sufficient condition for this bound to be sharp.

Keywords
Legendrian link, Khovanov homology, Tait graph, spanning tree
Mathematical Subject Classification 2000
Primary: 57M25
Secondary: 57R17
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Publication
Received: 31 May 2006
Revised: 25 August 2006
Accepted: 26 August 2006
Published: 21 October 2006
Authors
Hao Wu
Department of mathematics and Statistics
Lederle Graduate Research Tower
710 North Pleasant Street
University of Massachusetts
Amherst, MA 01003-9305
USA