Normal modes of a lagrangian system constrained in a potential well
Note on existence of periodic solutions to the third-order nonlinear differential equation
Note on the periodic solutions of systems of ordinary differential equations
Note to the existence of periodic solutions for higher-order differential equations with nonlinear restoring term and time-variable coefficients
Note to the Lagrange stability of excited pendulum type equations
Note to the paper of Fučík and Mawhin
O периодических решениях систем дифференциальных уравнений второго порядка
On a coincidence of central dispersions of the first and second kind in connection with periodic solutions of the differential equation
On a maximal number of period annuli.
On a nonlinear second order periodic boundaryvalue problem with Carathéodory functions
The periodic boundary value problem u''(t) = f(t,u(t),u'(t)) with u(0) = u(2π) and u'(0) = u'(2π) is studied using the generalized method of upper and lower solutions, where f is a Carathéodory function satisfying a Nagumo condition. The existence of solutions is obtained under suitable conditions on f. The results improve and generalize the work of M.-X. Wang et al. [5].
On boundary value problems of periodic type for ordinary odd order differential equations
On centers of type of polynomial systems
On conditioning of Schur complements of H-TFETI clusters for 2D problems governed by Laplacian
Bounds on the spectrum of the Schur complements of subdomain stiffness matrices with respect to the interior variables are key ingredients in the analysis of many domain decomposition methods. Here we are interested in the analysis of floating clusters, i.e. subdomains without prescribed Dirichlet conditions that are decomposed into still smaller subdomains glued on primal level in some nodes and/or by some averages. We give the estimates of the regular condition number of the Schur complements...
On critical points for noncoercive functionals and subharmonic solutions of some Hamiltonian systems.
On Existence of Positive Periodic Solutions.
On forced periodic oscillations in dissipative Liénard systems
On generalized periodic solutions of linear differential equations of order n
On geometric detection of periodic solutions and chaotic dynamics.
On Invariant Closed Curves for One-Step Methods.
On limit properties of phases and of central dispersions in the oscillatory equation with a periodic coefficient