Browsing by Author "Fu, Hung-Lin"

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    A Quadratic Integer Programming with Application in Chaotic Mappings of Complete Multipartite Graphs
    (2000-10-02) Fu, Hung-Lin; Shiue, Chin-lin; Cheng, Xiuzhen; Du, Ding-Zhu; Kim, Joon-Mo
    Let alpha be a permutation of V(G) of a connected graph G. Define the total relative displacement of alpha in G by where dG(x,y) is the length of the shortest path between x and y in G. Let pi*(G) be the maximum value of deltaalpha(G) among all permutations of V(G) and the permutation which realizes pi*(G) is called a chaotic mapping of G. In this paper, we study the chaotic mappings of complete multipartite graphs. The problem will reduce to a quadratic integer programming. We characterize its optimal solution and present an algorithm running in O(n5log n) time where n is the total number of vertices in a complete multipartite graph.