Nested ideals and topologically ${\mathbf{u}}_{\mathcal{I}}$-torsion elements of the circle group

R. Di santo, D. Dikranjan, A. Giordano Bruno +1

Let $\mathbf{u}=(u_n{)}_{n\in \mathbb{N}}$ be a sequence in ${\mathbb{N}}_{+}$ with $u_0=1$ and $u_n\mid u_{n+1}$ for every $n\in \mathbb{N}$, and let $b_n:=u_{n+1}/u_n$ for every $n\in\mathbb…