Periodicity of -expansions for certain Pisot units Sandra Vaz; Pedro Martins Rodrigues — 2012 ESAIM: Proceedings Given β > 1, let T β T β : [ 0 , 1 [ → [ 0 , 1 [ x → βx − ⌊ βx ⌋ . The iteration of this transformation gives rise to the greedy β-expansion. There has been extensive research on the properties of this expansion and its dependence on the parameter β. In...