CENTER CONDITIONS AND CYCLICITY FOR A FAMILY OF CUBIC SYSTEMS: COMPUTER ALGEBRA APPROACH

Math Comput Simul. 2013 Jan:87:10.1016/j.matcom.2013.02.003. doi: 10.1016/j.matcom.2013.02.003.

Abstract

Using methods of computational algebra we obtain an upper bound for the cyclicity of a family of cubic systems. We overcame the problem of nonradicality of the associated Bautin ideal by moving from the ring of polynomials to a coordinate ring. Finally, we determine the number of limit cycles bifurcating from each component of the center variety.

Keywords: center problem; cyclicity; limit cycles.