SNS – Centro De Giorgi.<\/p>\n
The simplest perturbation, still in the parabolic realm, is given by time-changes. These have been investigated in detail in the case of the horocycle flow and for nilflows. In this talk, we will give a detailed introduction to the classical theory of horocycles and their time-changes, before presenting our result, joint with Livio Flaminio and Davide Ravotti, on rigidity of time-changes of unipotent flows on finite volume quotients of simple Lie groups, which generalizes Ratner’s classical work on the horocycle flow.<\/span><\/span><\/p>\n Further information is available on the event page<\/a> on the Indico platform.<\/p>\n","protected":false},"excerpt":{"rendered":" Parabolic flows form an intermediate category between elliptic and hyperbolic flows.\u00a0They exhibit some characteristics associated with non-chaotic systems, and some associated with highly chaotic ones.\u00a0A fundamental example is the horocycle flow on…<\/p>\n