Legendrian links and the spanning tree model for Khovanov homology
Hao Wu
math.GTarXiv:math/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.
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