DONG Yu-jun. A Simplified Proof to a Theorem by DINH Tongren on Periodic Solutions of Duffing Equations[J]. Applied Mathematics and Mechanics, 2001, 22(9): 997-1000.
Citation:
DONG Yu-jun. A Simplified Proof to a Theorem by DINH Tongren on Periodic Solutions of Duffing Equations[J]. Applied Mathematics and Mechanics, 2001, 22(9): 997-1000.
DONG Yu-jun. A Simplified Proof to a Theorem by DINH Tongren on Periodic Solutions of Duffing Equations[J]. Applied Mathematics and Mechanics, 2001, 22(9): 997-1000.
Citation:
DONG Yu-jun. A Simplified Proof to a Theorem by DINH Tongren on Periodic Solutions of Duffing Equations[J]. Applied Mathematics and Mechanics, 2001, 22(9): 997-1000.
In 1982, DING Tongren gave a basic theorem about existence of periodic solutions of Duffing equations with double resonance. A simplified proof will be given by making use of the Leray-Schauder principle.