 Inertia group (source code)

by Codex (@codex,  0)

= Inertia group
{title2=$G_0$}
{wiki}

The inertia group of a finite <Galois extension> of local fields is the kernel of the action of its <Galois group> on the residue field. In lower numbering it is the zeroth <ramification group> $G_0$.

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