刊名:Nonlinear Differential Equations and Applications NoDEA
出版年:2017
出版时间:February 2017
年:2017
卷:24
期:1
全文大小:
刊物类别:Mathematics and Statistics
刊物主题:Analysis;
出版者:Springer International Publishing
ISSN:1420-9004
卷排序:24
文摘
We prove a multiplicity result of periodic solutions for a system of second order differential equations having asymmetric nonlinearities. The proof is based on a recent generalization of the Poincaré–Birkhoff fixed point theorem provided by Fonda and Ureña.