A Generalization of Arithmetic Derivative to $p$-adic Fields and Number Fields

Brad Emmons; Xiao Xiao

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arXiv · 2307.04912

A Generalization of Arithmetic Derivative to $p$-adic Fields and Number Fields

Brad Emmons·Xiao Xiao

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Abstract

The arithmetic derivative is a function from the natural numbers to itself that sends all prime numbers to $1$ and satisfies the Leibniz rule. The arithmetic partial derivative with respect to a prime $p$ is the $p$-th component of the arithmetic derivative. In this paper, we generalize the arithmetic partial derivative to $p$-adic fields (the local case) and the arithmetic derivative to number fields (the global case). We study the dynamical system of the $p$-adic valuation of the iterations of the arithmetic partial derivatives. We also prove that for every integer $n\geq 0$, there are infinitely many elements with exactly $n$ anti-partial derivatives. In the end, we study the $p$-adic continuity of arithmetic derivatives.

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Brad Emmons, Xiao Xiao. 2023-07-10. A Generalization of Arithmetic Derivative to $p$-adic Fields and Number Fields. https://arxiv.org/abs/2307.04912

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