@techreport{347d225f7c694aff85e5a27c3c5e7f14, title = "A lower bound for the differences of powers of linear operators", keywords = "Berkani's conjecture, decay, differences of powers, quasi-nilpotent linear operator, Berkani's conjecture, decay, differences of powers, quasi-nilpotent linear operator, Berkani's conjecture, decay, differences of powers, quasi-nilpotent linear operator", author = "Jarmo Malinen and Olavi Nevanlinna and Ville Turunen and Z. Yuan", year = "2004", language = "English", isbn = "951-22-7015-3", series = "Helsinki University of Technology Institute of Mathematics Research Reports", publisher = "Teknillinen korkeakoulu", number = "A467", type = "WorkingPaper", institution = "Teknillinen korkeakoulu", }