Hypercyclicity of shifts on weighted Lp spaces of directed trees

In this paper, we study the hypercyclicity of forward and backward shifts on weighted LpLp spaces of a directed tree. In the forward case, only the trivial trees may support hypercyclic shifts, in which case the classical results of Salas [21] apply. For the backward case, nontrivial trees may support hypercyclic shifts. We obtain necessary conditions and sufficient conditions for hypercyclicity of the backward shift and, in the case of a rooted tree on an unweighted space, we show that these conditions coincide.