In this paper. four sufficiency theorems of existence of periodic solutions for aclass of retarded functional differential equations are given. The result of thesetheorems is better than the well-known Yoshizawa’s p...In this paper. four sufficiency theorems of existence of periodic solutions for aclass of retarded functional differential equations are given. The result of thesetheorems is better than the well-known Yoshizawa’s periodic solution theorem. Anexample of application is given at the end.展开更多
In this paper, we consider the retarded Lienard-type equationwhere h is a nonnegative constant, f_1 , f_2, and g are continuous functions on R.Using Liapunov functional method, we obtain the sufficient conditions to ...In this paper, we consider the retarded Lienard-type equationwhere h is a nonnegative constant, f_1 , f_2, and g are continuous functions on R.Using Liapunov functional method, we obtain the sufficient conditions to ensurethe stability and boundedness of solutions for Eq.(1).展开更多
文摘In this paper. four sufficiency theorems of existence of periodic solutions for aclass of retarded functional differential equations are given. The result of thesetheorems is better than the well-known Yoshizawa’s periodic solution theorem. Anexample of application is given at the end.
文摘In this paper, we consider the retarded Lienard-type equationwhere h is a nonnegative constant, f_1 , f_2, and g are continuous functions on R.Using Liapunov functional method, we obtain the sufficient conditions to ensurethe stability and boundedness of solutions for Eq.(1).