Tarpey, T. - In: Journal of Multivariate Analysis 53 (1995) 1, pp. 39-51
The k principal points [xi]1, ..., [xi]k of a random vector X are the points that approximate the distribution of X by minimizing the expected squared distance of X to the nearest of the [xi]j. A given set of k points y1, ..., yk partition p into domains of attraction D1, ..., Dk respectively,...