Universal centres and composition conditions
Universal centres and composition conditions
复制标题
DOI：
10.1112/plms/pds050
复制
发表时间：
2013-03
影响因子：
1.8
通讯作者：
J. Giné;M. Grau;J. Llibre
中科院分区：
文献类型：
--
作者：
J. Giné;M. Grau;J. Llibre
In this paper, we characterize the universal centres of the ordinary differential equations dρ/dθ=∑i=1∞ai(θ)ρi+1 , where ai(θ) are trigonometric polynomials, in terms of the composition conditions. These centres are closely related with the classical Poincaré centre problem for planar analytic differential systems.
