On a codimension 3 bifurcation of plane vector fields with symmetry
On a coincidence of central dispersions of the first and second kind in connection with periodic solutions of the differential equation
On a coincidence of the differential equation with its associated equation
On a conjecture about an integral criterion for oscillation
We discuss an open question of Kiguradze and Chanturia about Property and Property for the equation . The proposed integral criterion is proved in a few cases.
On a criterion of the absence of strongly increasing solutions of the Emden-Fowler equation.
On a distribution of zeros of solutions of a fourth-order iterated linear differential equation
On a distribution of zeros of solutions of an iterated differential equation of the -th order
On a fundamental central dispersion of the first kind and the Abel functional equation in strongly regular spaces of continuous functions
On a higher-order evolution equation with a Stepanov-bounded solution.
On a maximal number of period annuli.
On a new reliable algorithm.
On a nonlinear ordinary differential equation
On a nonlinear problem for third-order differential equations
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 a periodic predator-prey system with Holling III functional response and stage structure for prey.
On a perturbed nonlinear third order differential equation
In this paper we will study some asymptotic properties of a nonlinear third order differential equation viewed as a perturbation of a simpler nonlinear equation investigated recently by the authors in [4].
On a q-deformed harmonic oscillator with variable linear momentum.
On a quasi-periodic Hopf bifurcation
On a reduction of nonlinear ordinary differential equations at an irregular type singularity
On a result of Etgen and Lewis