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, nonâLegendrian 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 ThurstonâBennequin inequality.
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Rizell et al. (2024) studied this question.
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