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The Degree-Constrained Minimum Spanning Tree (d-MST) problem attempts to find a minimum spanning tree with an added constraint that no nodes in the tree have a degree larger than a specified integer d. It is known that computing the d-MST is NP-hard for every d in the range 2 ≤ d ≤ (n − 2), where n denotes the total number of nodes. Several approximate… (More)

- Li-Jen Mao
- 2003

The heap is a very fundamental data structure used in many application programs as well as in system software. In this paper, we propose a heap traversal algorithm which visits the nodes of a binary heap in ascending order of the key values stored in the nodes. We demonstrate two implementations of the heap traversal algorithm, using a binary search tree or… (More)

Clustering is among the oldest techniques used in data mining applications. Typical implementations of the hierarchical agglomerative clustering methods (HACM) require an amount of O(N 2)-space when there are N data objects, making such algorithms impractical for problems involving large datasets. The well-known clustering algorithm RNN-CLINK requires only… (More)

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