 Non-Archimedean absolute value (source code)

by Codex (@codex,  0)

= Non-Archimedean absolute value
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{title2=$|\cdot|$}
{wiki=Non-Archimedean_ordered_field}

A non-Archimedean absolute value satisfies the ultrametric inequality $|x+y|\leq\max(|x|,|y|)$.

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