estimate for a sum of products of Weil's sum – mathoverflow.net

estimate for a sum of products of Weil's sum – mathoverflow.net

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Let $p$ be a prime and consider the field $\mathbb{F}_p$. Fix $f\in\mathbb{F}_p[X]$ a polynomial of degree $d\ge 2$. Define $$ K(x,y)=\frac{1}{\sqrt{p}}\sum_{z\in\mathbb{F}_p}e_p(xz+yf(z)), $$ where ...

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