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DTSTART;VALUE=DATE:20151215T171500
DTEND;VALUE=DATE:20151215T171500
UID:5735@agenda.unifr.ch
DESCRIPTION:Spheres serve in different geometries as  the most symmetric models. In CR-geometry a sphere is given by the equation Im $w= |z|^2$ (which is essentially equivalent to $|z|^2+|w|^2=1$). In this geometry the sphere has an 8-dimensional family of fractional-linear transformations of the ambient space. Choosing one symmetry out of a 7-dimensional subfamily gives the sphere the additional structure of a Sasaki manifold with a canonical embedding into $C^2$. \nIn my talk I will answer the question, posed by N. Stanton, how many such embeddings exist.  This is joint work with V. Ezhov.
SUMMARY:Prof. Gerd Schmalz (UNE / Max-Planck-Institute Bonn): Rigid CR-spheres  
CATEGORIES:Colloque / Congrès / Forum
LOCATION:PER 08\, Phys 2.52\, Chemin du Musée 3\, 1700 Fribourg
URL;VALUE=URI:https://agenda.unifr.ch/e/fr/5735
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