A 1–parameter family of spherical CR uniformizations of the figure eight knot complement

Deraux, Martin¹

¹ Institut Fourier, Université Grenoble Alpes, 100 rue des maths, 38610 Gières, France

Geometry & topology, Tome 20 (2016) no. 6, pp. 3571-3621.

Résumé

We describe a simple fundamental domain for the holonomy group of the boundary unipotent spherical CR uniformization of the figure eight knot complement, and deduce that small deformations of that holonomy group (such that the boundary holonomy remains parabolic) also give a uniformization of the figure eight knot complement. Finally, we construct an explicit $1$–parameter family of deformations of the boundary unipotent holonomy group such that the boundary holonomy is twist-parabolic. For small values of the twist of these parabolic elements, this produces a $1$–parameter family of pairwise nonconjugate spherical CR uniformizations of the figure eight knot complement.

Détail

DOI : 10.2140/gt.2016.20.3571

Classification : 22E40, 32V05, 57M50
Keywords: geometric structures, spherical CR structures, complex hyperbolic geometry, discrete groups

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