Séminaire Gaston Darboux
vendredi 06 juillet 2018 à 11:15 - salle 430
Tianyi Zheng (UC San Diego)
Growth of the first Grigorchuk group
On the first Grigorchuk group we construct random walks of finite entropy and power-law tail decay with non-trivial Poisson boundary. Such random walks provide near optimal volume lower estimates for the group. Joint with Anna Erschler.