The $μ-$invariant of fine Selmer groups associated to general Drinfeld modules

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Main Author: Chen, Hang
Format: Preprint
Published: 2025
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author Chen, Hang
author_facet Chen, Hang
contents Let $F$ be a global function field over the finite field $\mathbb{F}_q$ where $q$ is a prime power and $A$ be the ring of elements in $F$ regular outside $\infty$. Let $ϕ$ be an arbitrary Drinfeld module over $F$ For a fixed non-zero prime ideal $\mathfrak{p}$ of $A$, we show that on the constant $\mathbb{Z}_{\textit{p}}-$extension $\mathfrak{F}$ of $F$, the Pontryagin dual of the fine Selmer group associated to the $\mathfrak{p}-$primary torsion of $ϕ$ over $\mathfrak{F}$ is a finitely generated Iwasawa module such that its Iwasawa $μ-$invariant vanishes. This provides a generalization of the results given in arXiv:2311.06499.
format Preprint
id arxiv_https___arxiv_org_abs_2507_02688
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle The $μ-$invariant of fine Selmer groups associated to general Drinfeld modules
Chen, Hang
Number Theory
Let $F$ be a global function field over the finite field $\mathbb{F}_q$ where $q$ is a prime power and $A$ be the ring of elements in $F$ regular outside $\infty$. Let $ϕ$ be an arbitrary Drinfeld module over $F$ For a fixed non-zero prime ideal $\mathfrak{p}$ of $A$, we show that on the constant $\mathbb{Z}_{\textit{p}}-$extension $\mathfrak{F}$ of $F$, the Pontryagin dual of the fine Selmer group associated to the $\mathfrak{p}-$primary torsion of $ϕ$ over $\mathfrak{F}$ is a finitely generated Iwasawa module such that its Iwasawa $μ-$invariant vanishes. This provides a generalization of the results given in arXiv:2311.06499.
title The $μ-$invariant of fine Selmer groups associated to general Drinfeld modules
topic Number Theory
url https://arxiv.org/abs/2507.02688