A local sink is a node of a Directed Graph with no exiting edges, also called a Terminal (Borowski and Borwein 1991, p. 401). A (global) sink is a node in a Directed Graph which is reached by all directed edges (Harary 1994, p. 201).

**References**

Borowski, E. J. and Borwein, J. M. (Eds.). *The HarperCollins Dictionary of Mathematics.*
New York: HarperCollins, 1991.

Harary, F. *Graph Theory.* Reading, MA: Addison-Wesley, 1994.

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1999-05-26