A note on Bohr's theorem for Beurling integer systems

Frederik Broucke, Athanasios Kouroupis, Karl-Mikael Perfekt

Given a sequence of frequencies $\{{\lambda }_n{\}}_{n\ge 1}$, a corresponding generalized Dirichlet series is of the form $f(s)={\sum }_{n\ge 1}{a}_n{e}^{-{\lambda }_{n}s}$. We are interested in multiplicati…