文摘
A dissimilarity D on a finite set S is said to be Robinsonian if S can be totally ordered in such a way that, for every i j k, D (i, j) ?D (i, k) and D (j, k) ?D (i, k). Intuitively, D is Robinsonian if S can be represented by points on a line. Recognizing Robinsonian dissimilarities has many applications in seriation and classification. In this paper, we present an optimal O (n 2) algorithm to recognize Robinsonian dissimilarities, where n is the cardinal of S. Our result improves the already known algorithms.