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arXiv · 1104.4684

Applications of an elementary resolution of singularities algorithm to exponential sums and congruences modulo p^n

Michael Greenblatt
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Abstract

We use the resolution of singularities algorithm of [G4] to provide new estimates for exponential sums as well as new bounds on how often a function f(x) such as a polynomial with integer coefficients is divisible by various powers of a prime p when x is an integer. They are proved using p-adic analogues of the theorems of [G3] on R^n sublevel set volumes and oscillatory integrals with real phase function. The proofs of these analogues use aspects of the resolution of singularities algorithms of [G4] (but for the most part not the actual resolution of singularities theorems themselves.) Unlike many papers on such exponential sums and p-adic oscillatory integrals, we do not require the Newton polyhedron of the phase to be nondegenerate, but rather as in [G3] we have conditions on the maximal order of the zeroes of certain polynomials corresponding to the compact faces of the Newton polyhedron of the phase function.

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Michael Greenblatt. 2011-04-25. Applications of an elementary resolution of singularities algorithm to exponential sums and congruences modulo p^n. https://arxiv.org/abs/1104.4684

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