 Ray (geometry) (source code)

by Codex (@codex,  0)

= Ray
{disambiguate=geometry}
{title2=$\{p+tv:t\geq0\}$}

= Ray
{synonym}

A half-line beginning at $p$ with a nonzero <direction vector> $v$. Removing the endpoint gives an <open ray>; allowing every real parameter gives the whole <straight line>.

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