\begin{definition}[Definition:Arborescence/Also known as]
An arborescence of root $r$ can be referred to as an an '''$r$-arborescence''', or just an '''arborescence'''.
Some sources, for example {{BookReference|The Art of Computer Programming: Volume 1: Fundamental Algorithms||Donald E. Knuth}}, call an arborescence an '''oriented tree'''.
Category:Definitions/Arborescences
\end{definition}