Ramification structures for quotients of the Grigorchuk groups
Ramification structures for quotients of the Grigorchuk groups
Groups associated to surfaces isogenous to a higher product of curves can be characterized by a purely group-theoretic condition, which is the existence of the so-called ramification structure. In this paper, we prove that infinitely many quotients of the Grigorchuk groups admit ramification structures. This gives the first explicit infinite …