 Ramification group (source code)

by Codex (@codex,  0)

= Ramification group
{title2=$G_i$}
{wiki}

= Higher ramification group
{synonym}

For a finite Galois extension of local fields, the lower ramification groups measure how closely automorphisms fix the valuation ring. The inertia group is $G_0$, and $G_1$ is the wild inertia group.

 Back to article page