logo IMB
Retour

Séminaire de Théorie Algorithmique des Nombres

Computing Galois groups over p-adic fields

Christopher Doris

( Heilbronn Institute and University of Bristol )

Online

le 13 octobre 2020 à 10:00

We give an overview of the history of computing Galois groups over p-adic fields, with some diversions to recent progress over the rational field. We focus on the "resolvent method," a family of techniques to compute Galois groups, and present a recent algorithm to do this in general over p-adic fields, the first of its kind. This algorithm greatly increases the degree of polynomial that can be routinely handled, and for example has been used to extend existing databases of Galois groups of p-adic fields to include all degree 18, 20 and 22 extensions of the 2-adic field. The implementation and tables of results are available on the speaker's website.