On the conditions for the oscillation of solutions of non-linear third order differential equations
On the Cordovan ogive
On the critical periods of Liénard systems with cubic restoring forces.
On the Darboux transformation. I.
On the density of the range for some nonlinear operators
On the direction of pitchfork bifurcation.
On the discretization of a partial differential equation in the neighborhood of a periodic orbit.
On the dispersion structure of the differential equation y"=q(t)y having in the generalized Floquet theory the same characteristic multipliers
On the distribution of zeros of solutions of some types of differential equation
On the dynamics of the generalized Emden-Fowler equation.
On the exact multiplicity of solutions for boundary-value problems via computing the direction of bifurcations.
On the exceptional case in systems of non-linear differential equations
On the existence and boundedness of solutions of a nonlinear delay differential system
On the Existence and Uniqueness of Periodic Solutions of Differential Delay Equations.
On the existence of a bounded solution of a non-linear differential equation
On the existence of a periodic solution of a nonlinear ordinary differential equation.
On the existence of a solution of a vector periodic boundary value problem
On the existence of almost periodic Lyapunov functions for impulsive differential equations.
On the existence of bounded solutions of differential equations in Banach spaces
On the existence of canard solutions
We study the existence of global canard surfaces for a wide class of real singular perturbation problems. These surfaces define families of solutions which remain near the slow curve as the singular parameter goes to zero.