A new kth derivative estimate for exponential sums via Vinogradov’s mean value
A new kth derivative estimate for exponential sums via Vinogradov’s mean value
复制标题
通过维诺格拉多夫平均值对指数和进行新的 k 阶导数估计
DOI:
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发表时间:
2016
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通讯作者:
D. R. Heath
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文献类型:
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作者:
D. R. Heath
We give a slight refinement to the process by which estimates for exponential sums are extracted from bounds for Vinogradov’s mean value. Coupling this with the recent works of Wooley, and of Bourgain, Demeter and Guth, providing optimal bounds for the Vinogradov mean value, we produce a powerful new kth derivative estimate. Roughly speaking, this improves the van der Corput estimate for k ≥ 4. Various corollaries are given, showing for example that $$zeta left( {sigma + it}
ight){ ll _varepsilon }{t^{{{left( {1 - sigma }
ight)}^{3/2}}/2 + varepsilon }}$$ζ(σ+it)≪εt(1−σ)3/2/2+ε for t ≥ 2 and 0 ≤ σ ≤ 1, for any fixed ε > 0.