Euclidean ray
= Euclidean ray
{c}
{title2=$\{tv:t\geq0\}$}
A Euclidean ray from the origin with direction $v\ne0$ is the geometric half-line $\{tv:t\geq0\}$. Points in the strictly positive quadrant lie on rays with positive slope.
= Euclidean ray
{c}
{title2=$\{tv:t\geq0\}$}
A Euclidean ray from the origin with direction $v\ne0$ is the geometric half-line $\{tv:t\geq0\}$. Points in the strictly positive quadrant lie on rays with positive slope.