Published online by Cambridge University Press: 20 January 2009
The objective of this article are sums S(M)=∑n;ψ(Mf(n/M)) where ψdenotes essentially the fractional part minus ½, f is a C4-function with fn nonvanishing, and summation is extended over an interval of order M. For S(M) an Ω-estimate and a mean-square bound is obtained. Applications to problems concerning the number of lattice points in large planar domains are discussed.
This article is part of a research project supported by the Austrian Science Foundation (Nr. P 9892-PHY).