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7 votes
3 answers
911 views

Does the equation $x^2+x=a$ have an integer solution?

I am writing a paper on the topological structure of the Golomb space (defined here) and arrived to the following question: Question 1. Is it true that for a number $a\in\mathbb N$ the equation $x^2+...
Taras Banakh's user avatar
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2 votes
1 answer
600 views

Density of rational points over finite fields, an estimate of Lang-Weil constant

Let $X\hookrightarrow\mathbb P^n_{\mathbb F_q}$ be a geometrically integral hypersurface over the finite field $\mathbb F_q$ of degree $\delta$. In order to estimate the number of its rational points, ...
var's user avatar
  • 403
2 votes
0 answers
87 views

Variation of Gauss/Jacobi sums on a variety

Let $V \subset \mathbb P^n$ be a nice (smooth, projective?) variety over a finite field $\mathbb F_q$. Let $\chi_0,\chi_1,\dots,\chi_{n}: \mathbb F_q^\times \to \mathbb Q(\mu_{q-1})$ be multiplicative ...
Asvin's user avatar
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