title: Comment on "Kullback-Leibler and renormalized entropies: applications to electroencephalograms of epilepsy patients".
abstract: In a recent paper Quian Quiroga et al. [R. Quian Quiroga et al., Phys. Rev. E 62, 8380 (2000)] found renormalized entropy, formerly introduced as a complexity measure for the different regimes of a dynamical system, to be closely related to the standard Kullback-Leibler entropy. They assure this finding by reanalyzing electroencephalographic data of epilepsy patients, previously examined by exclusive use of renormalized entropy [K. Kopitzki et al., Phys. Rev. E 58, 4859 (1998)]. We argue that the general considerations undertaken by the authors and the experimental results do not justify this conclusion.
authors.affiliation: Department of Neurological Science, University of Liverpool, Liverpool, United Kingdom.
authors.forename: K
authors.initials: K
authors.lastname: Kopitzki
authors.forename: P C
authors.initials: PC
authors.lastname: Warnke
authors.forename: P
authors.initials: P
authors.lastname: Saparin
authors.forename: J
authors.initials: J
authors.lastname: Kurths
authors.forename: J
authors.initials: J
authors.lastname: Timmer
mesh_terms: D003627:Data Interpretation, Statistical; D004569:Electroencephalography; D019277:Entropy; D004827:Epilepsy / Q000503:physiopathology*; D006801:Humans