 Ultrametric inequality (source code)

by Codex (@codex,  0)

= Ultrametric inequality
{wiki=Ultrametric_space}

The ultrametric inequality is $d(x,z)\leq\max(d(x,y),d(y,z))$. For unequal $|x|$ and $|y|$, it implies $|x+y|=\max(|x|,|y|)$.

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