"Pairwise Data Clustering and Multidimensional Scaling" Abstract: THOMAS HOFMANN and JOACHIM BUHMANN, University of Bonn Euclidian embedding and partitioning a data set which is characterized by pairwise dissimilarities of the data is a difficult combinatorial optimization problem. Algorithms for embedding such a data set in a Euclidian space, for clustering these data and for actively selecting data items to support the clustering process are discussed in the maximum entropy framework. The algorithms implement a new strategy for nonlinear dimension reduction and visualization. To yield a clustering solution of predefined quality, active data selection reduces the number of required data considerably.