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
On a spectral criterion for almost periodicity of solutions of periodic evolution equations.
On a structure of second order linear differential equations with periodic coefficients having the same discriminant
On a structure of the intersection of the set of dispersions of two second-order linear differential equations
On a theorem of Nehari and quasidiscs.
On a transformation of solutions of the differential equation with a complex coefficient of a real variable
On algebraic approach in quadratic systems.
On algebraic properties of dispersions of the 3rd and 4th kind of the differential equation
On algebraic solutions of algebraic Pfaff equations
We give a new proof of Jouanolou’s theorem about non-existence of algebraic solutions to the system . We also present some generalizations of the results of Darboux and Jouanolou about algebraic Pfaff forms with algebraic solutions.
On Almost-periodical Solutions of an Equation
On an algebraic structure of a group of phases