Amir Y. Weiss Behar

collaborators

2 papers

math.GR2023

Self-similarity of p-adic groups

Amir Y. Weiss Behar, Devora Zalaznik

We show that a compact open subgroup $H$ of a simple algebraic $p$ -adic group $G$ is self-similar if and only if it is isotropic.

math.GR2023

Profinite non-rigidity of arithmetic groups

Amir Y. Weiss Behar

We show that for a typical high rank arithmetic lattice $Γ$ , there exist finite index subgroups $Γ_{1}$ and $Γ_{2}$ such that $Γ_{1} \neq ≃ Γ_{2}$ while $\widehat{Γ_{1}} \simeq…