monotone priority queue

(data structure)

Definition: A priority queue in which a key being inserted is never higher in priority than a previously deleted node.

Note: The keys deleted from a monotone priority queue form a monotonically increasing or monotonically decreasing sequence -- hence the name. After LK.

Author: PEB

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Entry modified 17 December 2004.
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Cite this as:
Paul E. Black, "monotone priority queue", in Dictionary of Algorithms and Data Structures [online], Paul E. Black, ed. 17 December 2004. (accessed TODAY) Available from: