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\begin{figure}\begin{center}\BoxedEPSF{Ray.epsf scaled 1000}\end{center}\end{figure}

A Vector $\overrightarrow{AB}$ from a point $A$ to a point $B$. In Geometry, a ray is usually taken as a half-infinite Line with one of the two points $A$ and $B$ taken to be at Infinity.

See also Line, Vector

© 1996-9 Eric W. Weisstein