2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/144982In this paper we prove that if two self-similar tiling systems, with respective stretching factors $λ_1$ and $λ_2$, have a common factor which is a non periodic tiling system, then $λ_1$ and $λ_2$ are multiplicatively dependent.Dynamical SystemsSelf-similar tiling systems, topological factors and stretching factorstext