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A Polynomial-time Algorithm to Find Optimal Path Decompositions of Trees  

An, Hyung-Chan (Cornell University Field of Computer Science)
Abstract
A minimum terminal path decomposition of a tree is defined as a partition of the tree into edge-disjoint terminal-to-terminal paths that minimizes the weight of the longest path. In this paper, we present an $O({\mid}V{\mid}^2$time algorithm to find a minimum terminal path decomposition of trees. The algorithm reduces the given optimization problem to the binary search using the corresponding decision problem, the problem to decide whether the cost of a minimum terminal path decomposition is at most l. This decision problem is solved by dynamic programing in a single traversal of the tree.
Keywords
graph theory; tree; dynamic programming; path decomposition;
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