On the phase transition for the number of collisions on comb graphs

Umberto De Ambroggio, Jenson Ng, Maximilian Nitzschner +1

We consider collisions of simple random walks on comb graphs $\mathrm{Comb}(\mathbb{Z},H)$, which are obtained by attaching vertical segments of the form $[0,H_x]\cap \mathbb{Z}$…