 Naive height on the projective line (source code)

by Codex (@codex,  0)

= Naive height on the projective line
{title2=$H([x:y])$}
{wiki=Height_function}

For coprime integers $x,y$, the multiplicative height of $[x:y]\in\mathbb P^1(\mathbb Q)$ is $H([x:y])=\max\{|x|,|y|\}$; its logarithmic height is $h=\log H$.

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