Instability of Legendrian knottedness, and non-regular Lagrangian
concordances of knots
Instability of Legendrian knottedness, and non-regular Lagrangian
concordances of knots
We show that the family of smoothly non-isotopic Legendrian pretzel knots from the work of Cornwell-Ng-Sivek that all have the same Legendrian invariants as the standard unknot have front-spuns that are Legendrian isotopic to the front-spun of the unknot. Besides that, we construct the first examples of Lagrangian concordances between …