title: Comment on "how to obtain extreme multistability in coupled dynamical systems".
abstract: We note that extreme multistability of the type described in the referenced paper can be achieved in virtually any dynamical system by adding extraneous variables and using their initial conditions in place of the existing parameters or as additional parameters. We show several simple examples of this and show how the referenced examples are similar.
authors.affiliation: Department of Physics, University of Wisconsin, 1150 University Avenue, Madison, Wisconsin 53706, USA.
authors.forename: J C
authors.initials: JC
authors.lastname: Sprott
authors.affiliation: Department of Engineering Technology, Jiangsu Institute of Commerce, 104 Guanghua Road, Nanjing 210003, China; Department of Physics, University of Wisconsin, 1150 University Avenue, Madison, Wisconsin 53706, USA; and School of Information Science and Engineering, Southeast University, Nanjing 210096, China.
authors.forename: Chunbiao
authors.initials: C
authors.lastname: Li
mesh_terms: D017711:Nonlinear Dynamics