Periodic Solutions Of Perioically Harvested Lotka-Volterra Systems.
Periodic solutions of perturbed superquadratic hamiltonian systems
Periodic solutions of polynomial non-autonomous differential equations.
Periodic solutions of quasi-differential equations.
Periodic Solutions of Second Order Nonautonomous Systems with the Potentials Changing Sign
Some existence and multiplicity results for periodic solutions of second order nonautonomous systems with the potentials changing sign are presented. The proofs of the existence results rely on the use of a linking theorem and the Mountain Pass theorem by Ambrosetti and Rabinowitz [2]. The multiplicity results are deduced by the study of constrained critical points of minimum or Mountain Pass type.
Periodic solutions of second-order Liénard equations with -Laplacian-like operators.
Periodic solutions of second-order nonautonomous dynamical systems.
Periodic solutions of semilinear impulsive periodic system with time-varying generating operators on Banach space.
Periodic solutions of some nonlinear differential equations of higher order
Periodic solutions of some second order differential systems
Periodic Solutions of Superquadratic Hamiltonian Systems with Bounded Forcing Terms.
Periodic solutions of the equation
Periodic solutions of the Rayleigh equation with damping of definite sign
The existence of a non-trivial periodic solution for the autonomous Rayleigh equation is proved, assuming conditions which do not imply that has a definite sign for large. A similar result is obtained for the periodically forced equation .
Periodic solutions of the third order parametric differential equations involving large nonlinearities
Periodic solutions of the third-order differential equation with right-hand side in the form of nonlinear restoring term plus general gradient-like part
Periodic solutions of with arbitrarily large period
Periodic solutions of
Periodic solutions of x" + f(μ, x) = 0
Periodic Solutions on hypersurfaces and a result by C. Viterbo.
Periodic solutions to a non-linear differential equation of the order
A criterion for the existance of periodic solutions of an ordinary differential equation of order k proved by J. Andres and J. Vorâcek for k = 3 is extended to an arbitrary odd k.