Additive Systems and a Theorem of de Bruijn
Additive Systems and a Theorem of de Bruijn
This paper proves a theorem of de Bruijn that classifies additive systems for the nonnegative integers, that is, families A = (Ai)iεI of sets of nonnegative integers, each set containing 0, such that every nonnegative integer can be written uniquely in the form , with ai ε Ai for all …