On sums of Ramanujan sums
The norm of a trigonometric polynomial with non zero coefficients of absolute value not less than 1 exceeds a fixed positive multiple of
The main purpose of the paper is to study, using the analytic method and the property of the Ramanujan’s sum, the computational problem of the mean value of the mixed exponential sums with Dirichlet characters and general Gauss sum. For integers , , , , with and , and Dirichlet characters , modulo we define a mixed exponential sum with Dirichlet character and general Gauss sum as coefficient, where denotes the summation over all such that , and . We mean value of and...