Small digitwise perturbations of a number make it normal to unrelated bases.
In this paper we study multi-dimensional words generated by fixed points of substitutions by projecting the integer points on the corresponding broken halfline. We show for a large class of substitutions that the resulting word is the restriction of a linear function modulo and that it can be decided whether the resulting word is space filling or not. The proof uses lattices and the abstract number system associated with the substitution.
étant une suite de nombres réels, soit l’ensemble normal associé. Pour , nous étudions la question : existe-t-il une suite à valeurs dans un intervalle borné telle que ? Dans l’affirmative, nous cherchons alors à minimiser la longueur de l’intervalle . Dans les cas les plus simples, où , ce problème se ramène à minimiser le degré de , avec la contrainte « a tous ses coefficients positifs», pour des polynômes de type très particulier associés aux ensembles .
Canonical number systems in the ring of gaussian integers are the natural generalization of ordinary -adic number systems to . It turns out, that each gaussian integer has a unique representation with respect to the powers of a certain base number . In this paper we investigate the sum of digits function of such number systems. First we prove a theorem on the sum of digits of numbers, that are not divisible by the -th power of a prime. Furthermore, we establish an Erdös-Kac type theorem...