Analogues of Alladi's formula over global function fields

Abstract

In this paper, we show an analogue of Kural, McDonald and Sah's result on Alladi's formula for global function fields. Explicitly, we show that for a global function field $K$, if a set $S$ of prime divisors has a natural density $\delta (S)$ within prime divisors, then $$-\underset{n\to \infty }{\lim }\sum _{\begin{array}{c}1\le °D\le n\\ D\in \mathfrak{D}(K,S)\end{array}}\frac{\mu (D)}{|D|}=\delta (S),$$ where $\mu (D)$ is the Möbius function on divisors and $\mathfrak{D}(K,S)$ is the set of all effective distinguishable divisors whose smallest prime factors are in $S$. As applications, we get the analogue of Dawsey's and Sweeting and Woo's results to the Chebotarev Density Theorem for function fields, and the analogue of Alladi's result to the Prime Polynomial Theorem for arithmetic progressions. We also display a connection between the Möbius function and the Fourier coefficients of modular form associated to elliptic curves. The proof of our main theorem is similar to the approach in Kural et al.'s article.

17 pages. To appear in Finite Fields and Their Applications

References in corpus (2)

• Analogues of Alladi's formula
• An analogue of a formula for Chebotarev Densities

Cited by in corpus (4)

• Dynamics on the number of prime divisors for additive arithmetic semigroups
• Generalizations of the Erdős-Kac Theorem and the Prime Number Theorem
• On Erdős covering systems in global function fields
• A logarithmic analogue of Alladi's formula