Analytic theories around the simplest screw

We present several analytic theories related to screw functions and describe the connections among them, taking the screw function of the simplest screw line as a guiding example.Note that this article does not contain any new results. Nevertheless, subsequent developments have suggested that the analytic structures associated with the simplest screw provide a useful prototype for a broader theory connected with zeta-functions, Weil’s quadratic forms, and related Hilbert-space structures arising in analytic number theory.