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Constructions and Isotopies of High-Dimensional Legendrian Spheres

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arxiv 2211.00773 v2 pith:HKEVXJMY submitted 2022-11-01 math.SG math.GT

classification math.SGmath.GT
keywords legendrianconstructionsekholmcontactspheresunknotbooksconstruction
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abstract

We explore the construction of Legendrian spheres in contact manifolds of any dimension. Two constructions involving open books work in any contact manifold, while one introduced by Ekholm works only in $\mathbb{R}^{2n+1}$. We show that these three constructions are isotopic to the Legendrian unknot, thus recovering and generalising a result of Courte and Ekholm, that shows Ekholm's doubling procedure produces the standard Legendrian unknot.

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