On twisted exponential sums
This article deals with exponential sums involving both multiplicative and additive characters. For a general exponential sum, we establish bounds on the degree of the associated L-function. In addition, if the L- function is nicely behaved, we give an estimate for the p-adic size of its reciprocal roots. These results are expressed in terms of the Newton polyhedron of the Laurent polynomial appearing in the exponential sum.
Newton polyhedron of the Laurent polynomial
scientific article; zbMATH DE number 4179466