This is a preview. Log in through your library . Abstract In 1979 A. F. Lavrik obtained some estimates for exponential sums over primes in arithmetic progressions by an analytic method. In the present ...

This is a preview. Log in through your library . Abstract Using the algebraic structure of the Stone-Čech compactification of the integers, Furstenberg and Glasner proved that for arbitrary k ⋲ N, ...