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Chebotarev density theorem in short intervals for extensions of $\mathbb{F}_q(T)$

Lior Bary-Soroker, Ofir Gorodetsky, Taelin Karidi, Will Sawin

Abstract

An old open problem in number theory is whether Chebotarev density theorem holds in short intervals. More precisely, given a Galois extension $E$ of $\mathbb{Q}$ with Galois group $G$, a conjugacy class $C$ in $G$ and an $1\geq \varepsilon>0$, one wants to compute the asymptotic of the number of primes $x\leq p\leq x+x^{\varepsilon}$ with Frobenius conjugacy class in $E$ equal to $C$. The level of difficulty grows as $\varepsilon$ becomes smaller. Assuming the Generalized Riemann Hypothesis, one can merely reach the regime $1\geq\varepsilon>1/2$. We establish a function field analogue of Chebotarev theorem in short intervals for any $\varepsilon>0$. Our result is valid in the limit when the size of the finite field tends to $\infty$ and when the extension is tamely ramified at infinity. The methods are based on a higher dimensional explicit Chebotarev theorem, and applied in a much more general setting of arithmetic functions, which we name $G$-factorization arithmetic functions.

Chebotarev density theorem in short intervals for extensions of $\mathbb{F}_q(T)$

Abstract

An old open problem in number theory is whether Chebotarev density theorem holds in short intervals. More precisely, given a Galois extension of with Galois group , a conjugacy class in and an , one wants to compute the asymptotic of the number of primes with Frobenius conjugacy class in equal to . The level of difficulty grows as becomes smaller. Assuming the Generalized Riemann Hypothesis, one can merely reach the regime . We establish a function field analogue of Chebotarev theorem in short intervals for any . Our result is valid in the limit when the size of the finite field tends to and when the extension is tamely ramified at infinity. The methods are based on a higher dimensional explicit Chebotarev theorem, and applied in a much more general setting of arithmetic functions, which we name -factorization arithmetic functions.

Paper Structure

This paper contains 23 sections, 22 theorems, 164 equations, 1 figure.

Key Result

Theorem 1.2

For every $B>0$ there exists a constant $M_B$ satisfying the following property. Let $q$ be a prime power. Let $n>m \ge 2$ if $q$ is odd and $n> m \ge 3$ otherwise. Let $G$ be a finite group and let $E/\mathbb{F}_q(T)$ be a geometric $G$-extension. Assume that the infinite prime is tamely ramified i

Figures (1)

  • Figure 1: Variety and field diagrams

Theorems & Definitions (40)

  • Conjecture 1.1
  • Theorem 1.2
  • Definition 3.1
  • Example 3.2
  • Example 4.1
  • Lemma 4.2
  • Theorem 4.3
  • Theorem 5.1
  • Lemma 5.2
  • proof
  • ...and 30 more