Periodic solutions of $n$th order delay Rayleigh equations
Volume 78 / 2002
Annales Polonici Mathematici 78 (2002), 261-266 MSC: 34K10, 34K13. DOI: 10.4064/ap78-3-4
A priori bounds are established for periodic solutions of an $n$th order Rayleigh equation with delay. From these bounds, existence theorems for periodic solutions are established by means of Mawhin's continuation theorem.