Haro, ÀlexPuig i Sadurní, Joaquim2012-02-102012-02-1020061054-1500https://hdl.handle.net/2445/21865We study the existence of strange nonchaotic attractors (SNA) in the family of Harper maps. We prove that for a set of parameters of positive measure, the map possesses a SNA. However, the set is nowhere dense. By changing the parameter arbitrarily small amounts, the attractor is a smooth curve and not a SNA.1 p.application/pdfeng(c) American Institute of Physics, 2006Teoria quànticaTeoria quàntica de campsRelativitat especial (Física)Quantum theoryQuantum field theorySpecial relativity (Physics)info:eu-repo/semantics/article557935info:eu-repo/semantics/openAccess