On partial T-adic exponential sums and partial exponential sums with p-power conductor

Abstract

Liu and Wan introduced T-adic exponential sums as a way to interpolate all character sums with character having p-power conductor. In this paper, we generalize their T-adic theory to partial T-adic exponential sums. We prove that the associated L-functions are T-adic meromorphic, and as a consequence, give a p-adic proof of rationality for all partial L-functions of characters with p-power conductor. We also give Newton-over-Hodge estimates.