Algebra seminar in Lincoln: talk by Dr Rachel Skipper

On the 20th of June 2019 Dr Rachel Skipper (Georg-August-Universität Göttingen and École Normale Supérieure de Lyon) visited Charlotte Scott Centre for Algebra and gave a talk “On the Cantor–Bendixson rank of the Grigorchuk group and the Gupta–Sidki 3-group”. Her visit is supported by the London Mathematical Society Grant Scheme 2 (Visits to the UK) and by the Lincoln Institute of Advanced Studies.

Abstract: We study the Cantor–Bendixson rank for the space of subgroups of the Grigorchuk group and the Gupta–Sidki group. In particular, we show that for $G$ the Grigorchuk group or the Gupta–Sidki 3-group, the Cantor–Bendixson rank of $Sub(G)$ is $\omega$ . This is a joint project with Phillip Wesolek.”