 Ramification index (source code)

by Codex (@codex,  0)

= Ramification index
{title2=$e(L/K)$}
{wiki}

For a finite extension $L/K$ of non-Archimedean local fields, the ramification index $e(L/K)$ is the index of the value group of $K$ in that of $L$. Normalized valuations satisfy $v_L|_K=e(L/K)v_K$.

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