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arXiv 1002.2208math.NTmath.CO
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$\mathbb{F}_p^n$上函数的线性型和高次一致性

Linear forms and higher-degree uniformity for functions on $\mathbb{F}_p^n$

W. T. Gowers, J. Wolf

摘要:

在[GW 09a]中我们证明了当且仅当这些线性型的$k$次幂是线性无关的时,$k-1$度的一致性足以控制一个线性型族的平均值。本文在$\mathbb{F}_p^n$中证明了这个猜想,只要$p$足够大.这个结果代表了Bergelson、Tao和Ziegler [BTZ 09,TZ08]最近关于$\mathbb{F}_p^n$上$U^k$范数的逆定理的首次应用之一。我们结合这一结果与一些抽象的参数,以证明一个有界函数可以表示为一个多项式阶段和一个小的部分,在适当的一致性规范的总和。这个分解定理的精确形式对我们的证明至关重要,并且定理本身可能是独立的。

英文摘要:

In [GW09a] we conjectured that uniformity of degree $k-1$ is sufficient to control an average over a family of linear forms if and only if the $k$th powers of these linear forms are linearly independent. In this paper we prove this conjecture in $\mathbb{F}_p^n$, provided only that $p$ is sufficiently large. This result represents one of the first applications of the recent inverse theorem for the $U^k$ norm over $\mathbb{F}_p^n$ by Bergelson, Tao and Ziegler [BTZ09,TZ08]. We combine this result with some abstract arguments in order to prove that a bounded function can be expressed as a sum of polynomial phases and a part that is small in the appropriate uniformity norm. The precise form of this decomposition theorem is critical to our proof, and the theorem itself may be of independent interest.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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