|XXXVIII Workshop on Geometric Methods in Physics||30.06-6.07.2019|
|VIII School on Geometry and Physics||24-28.06.2019|
Participants of Workshop
Participants of School
Poincare disk of a C*-algebra
We study the Poincaré disk of a unital C*-algebra A as a homogeneous reductive space of the group of all Moebius transformations with entries in A. We present a geometric interpretation of the partial isometry of an element of the disk in terms of a convenient operator cross ratio, related to some construction by M. I. Zelikin.
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