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arXiv · 2407.02063

Triple symbols in arithmetic

Dohyeong Kim·Masanori Morishita
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Abstract

Triple symbols are arithmetic analogues of the mod $n$ triple linking number in topology, where $n > 1$ is an integer. In this paper, we introduce a cohomological formulation of a mod $n$ triple symbol for characters over a number field containing a primitive $n$-th root of unity. Our definition is motivated by the arithmetic Chern--Simons theory and in this respect it differs from earlier approaches to triple symbols. We show that our symbol agrees with that of R\'edei when $n=2$ and of Amano--Mizusawa--Morishita when $n=3$.

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Dohyeong Kim, Masanori Morishita. 2024-07-02. Triple symbols in arithmetic. https://arxiv.org/abs/2407.02063

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