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.
Periodic solutions to a non-linear parametric differential equation of the third order
Si dimostra un teorema di esistenza di soluzioni periodiche dell'equazione differenziale ordinaria del terzo ordine con le funzioni , , periodiche in di periodo .
Periodic solutions to a singular abstract differential equation
Periodic solutions to abstract differential equations
Periodic solutions to certain evolution inequalities
Periodic solutions to evolution equations: existence, conditional stability and admissibility of function spaces
We prove the existence and conditional stability of periodic solutions to semilinear evolution equations of the form u̇ = A(t)u + g(t,u(t)), where the operator-valued function t ↦ A(t) is 1-periodic, and the operator g(t,x) is 1-periodic with respect to t for each fixed x and satisfies the φ-Lipschitz condition ||g(t,x₁) - g(t,x₂)|| ≤ φ(t)||x₁-x₂|| for φ(t) being a real and positive function which belongs to an admissible function space. We then apply the results to study the existence, uniqueness...