title: Comments on: A unified algorithm for principal and minor components extraction.
abstract: This letter points out that the unified algorithm given by Chen et al. (Chen, T., Amari, S., & Lin, Q. (1998). Neural Networks, 11, 385-390) is a direct generalization of our invariant-norm algorithm. However, this direct-generalized unified algorithm is not practical from the learning point of view as the involved computations are intensive. As a matter of fact, a more effective generalization is made available.
authors.affiliation: Lehrstuhl für Allgemeine und Theoretische Elektrotechnik, Universität Erlangen-Nürnberg, Cauerstrabetae 7, 91058, Erlangen, Germany
authors.forename: Fa Long
authors.initials: FL
authors.lastname: Luo
authors.forename: Rolf
authors.initials: R
authors.lastname: Unbehauen