 Uniformizer criterion for lower ramification groups (source code)

by Codex (@codex,  0)

= Uniformizer criterion for lower ramification groups

If $L/K$ is a finite totally ramified Galois extension and $\pi_L$ is a <uniformizer>, then
$$
G_i=\{\sigma:v_L(\sigma(\pi_L)-\pi_L)\geq i+1\}
$$
for every $i\geq0$.

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