Remarks on the stability of Kerr for axisymetryc perturbations
By Sergiu Klainerman
By Karma Dajani
Appears in collection : Summer School 2013 - Number Theory and Dynamics
In this course we give an introduction to the ergodic theory behind common number expansions, like expansions to integer and non-integer bases, Luroth series and continued fraction expansion. Starting with basic ideas in ergodic theory such as ergodicity, the ergodic theorem and natural extensions, we apply these to the familiar expansions mentioned above in order to understand the structure and global behaviour of different number theoretic expansions, and to obtain new and old results in an elegant and straightforward manner.