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math.GT2000
Computable Legendrian invariants
Lenhard L. Ng
We establish tools to facilitate the computation and application of the Chekanov-Eliashberg differential graded algebra (DGA), a Legendrian-isotopy invariant of Legendrian knots in…
math.GT2000
Legendrian mirrors and Legendrian isotopy
Lenhard L. Ng
We resolve a question of Fuchs and Tabachnikov by showing that there is a Legendrian knot in standard contact three-space with zero Maslov number which is not Legendrian isotopic t…