Lifts of points on curves and exponential sums

Details Lifts of points on curves and exponential sums Lifts of points on curves and exponential sums

2002-02-20

arxiv.org/abs/math/0202206v2

Mathematics

Number Theory

19 pages, latex2e

Scientific paper

We give bounds for exponential sums over curves defined over Galois rings. We first define summation subsets as the images of lifts of points from affine opens of the reduced curve, and we give bounds for the degrees of their coordinate functions. Then we get bounds for exponential sums, extending results of Kumar et al., Winnie Li over the projective line, and Voloch Walker over elliptic and $C_{ab}$ curves.

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