Computing the Galois group of a polynomial over a pp-adic field

preprint2020arXivOpen access

Abstract

We present a family of algorithms for computing the Galois group of a polynomial defined over a pp-adic field. Apart from the "naive" algorithm, these are the first general algorithms for this task. As an application, we compute the Galois groups of all totally ramified extensions of Q2\mathbb{Q}_2 of degrees 18, 20 and 22, tables of which are available online.

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