𝐶⁰-limits of Legendrian knots

Author:

Dimitroglou Rizell Georgios,Sullivan Michael

Abstract

Take a sequence of contactomorphisms of a contact three-manifold that C 0 C^0 -converges to a homeomorphism. If the images of a Legendrian knot limit to a smooth knot under this sequence, we show that it is contactomorphic to the original knot. We prove this by establishing that, on one hand, non–Legendrian knots admit a type of contact-squashing (similar to squeezing) onto transverse knots while, on the other hand, Legendrian knots do not admit such a squashing. The non-trivial input from contact topology that is needed is (a local version of) the Thurston–Bennequin inequality.

Funder

Knut och Alice Wallenbergs Stiftelse

Publisher

American Mathematical Society (AMS)

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