On oscillatory properties of an -th-order system of linear differential equations with deviating arguments.
On oscillatory properties of second order systems of ordinary differential equations.
On oscillatory properties of solutions of a certain nonlinear third order differential equation
On oscillatory properties of solutions of functional differential equations.
On oscillatory solution of the differential equations of the -th order
On oscillatory solutions of differential inequalities
On oscillatory solutions of fourth order ordinary differential equations
The paper deals with the oscillation of a differential equation as well as with the structure of its fundamental system of solutions.
On oscillatory solutions of nonlinear differential equations of the -th order vanishing at infinity
On oscillatory solutions of second order differential systems
On oscillatory solutions of the system of differential equations with deviating arguments
On oscillatory solutions of third order differential equation with quasiderivatives.
On oscillatory solutions of third-order linear differential equations
On peaks in carrying simplices
A necessary and sufficient condition is given for the carrying simplex of a dissipative totally competitive system of three ordinary differential equations to have a peak singularity at an axial equilibrium. For systems of Lotka-Volterra type that result translates into a simple condition on the coefficients.
On periodic oscillations for a class of feedback control systems in Hilbert spaces
In this paper, by using the topological degree theory for multivalued maps and the method of guiding functions in Hilbert spaces we deal with the existence of periodic oscillations for a class of feedback control systems in Hilbert spaces.
On periodic solutions of a class of second order nonautonomous systems with nonhomogeneous potentials indefinite in sign
On periodic solutions of abstract differential equations.
On periodic solutions of first order nonlinear differential equations with deviating arguments.
On periodic solutions of non-autonomous second order Hamiltonian systems
The purpose of this paper is to study the existence of periodic solutions for the non-autonomous second order Hamiltonian system Some new existence theorems are obtained by the least action principle.
On periodic solutions of nonlinear second order ordinary differential equations
On periodic solutions of superquadratic Hamiltonian systems.