Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8898965 | Journal of Differential Equations | 2018 | 23 Pages |
Abstract
In this paper we establish bifurcation theory of limit cycles for planar Ck smooth autonomous differential systems, with kâN. The key point is to study the smoothness of bifurcation functions which are basic and important tool on the study of Hopf bifurcation at a fine focus or a center, and of Poincaré bifurcation in a period annulus. We especially study the smoothness of the first order Melnikov function in degenerate Hopf bifurcation at an elementary center. As we know, the smoothness problem was solved for analytic and Câ differential systems, but it was not tackled for finitely smooth differential systems. Here, we present their optimal regularity of these bifurcation functions and their asymptotic expressions in the finite smooth case.
Related Topics
Physical Sciences and Engineering
Mathematics
Analysis
Authors
Maoan Han, Lijuan Sheng, Xiang Zhang,