The persistence of the Chekanov–Eliashberg algebra
2020
We apply the barcodes of persistent homology theory to the c Chekanov–Eliashberg algebra of a Legendrian submanifold to deduce displacement energy bounds for arbitrary Legendrians. We do not require the full Chekanov–Eliashberg algebra to admit an augmentation as we linearize the algebra only below a certain action level. As an application we show that it is not possible to
$$C^0$$
-approximate a stabilized Legendrian by a Legendrian that admits an augmentation.
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