title: Comments and Correction on "U-Processes and Preference Learning" (Neural Computation Vol. 26, pp. 2896-2924, 2014).
abstract: This note corrects an error in the proof of corollary 1 of Li et al. ( 2014 ). The original claim of the contraction principle in appendix D of Li et al. no longer holds.
authors.affiliation: Faculty of Mathematics and Computer Science, Nicolaus Copernicus University, 87-100 Toruń, Poland, and Faculty of Mathematics, Informatics and Mechanics University of Warsaw, 02-097 Warsaw, Poland wrejchel@gmail.com.
authors.forename: Wojciech
authors.initials: W
authors.lastname: Rejchel
authors.affiliation: School of Mathematics and Statistics, Huazhong University of Science and Technology, Wuhan 430074, China hongli@mail.hust.edu.cn.
authors.forename: Hong
authors.initials: H
authors.lastname: Li
authors.affiliation: School of Mathematics and Statistics, Huazhong University of Science and Technology, Wuhan 430074, China rcbrcb2004@163.com.
authors.forename: Chuanbao
authors.initials: C
authors.lastname: Ren
authors.affiliation: Faculty of Mathematics and Statistics, Hubei University, Wuhan 430062, China lilq@hubu.edu.cn.
authors.forename: Luoqing
authors.initials: L
authors.lastname: Li