Bounded solutions to perturbed nonlinear systems and asymptotic relationships.
Continuability, boundedness, and convergence to zero of solutions of a perturbed nonlinear ordinary differential equation
Coppel-Conti sets of linear systems.
Discretization and some qualitative properties of ordinary differential equations about equilibria.
Effect of nonlinear perturbations on second order linear nonoscillatory differential equations.
Error estimation for perturbed systems.
Estimates for the Cauchy matrix of perturbed linear impulsive equation.
Estimates of the lower exponent of a two-dimensional linear system under Perron perturbations.
Exponential estimates on the one-dimensional Schroedinger equation with bounded analytic potential
Exponential stability of nonlinear time-varying differential equations and applications.
Extrait d'une Lettre à M. Hermite, relative à l'application des fonctions elliptiques à la théorie des perturbations.
Fixed points, stability, and harmless perturbations.
Generalized practical stability results by perturbing Lyapunov functions.
Generalized stability of motion of impulsive Lurie-Postnikov systems with structural perturbation.
Harmonic solutions to perturbations of periodic separated variables ODEs on manifolds.
Hyers-Ulam stability of differential equation .
Integral Manifolds and Perturbations of the Nonlinear Part of Systems of Autonomous Differential Equations with Impulses at Fixed Moments
* This investigation was supported by the Bulgarian Ministry of Science and Education under Grant MM-7.Sufficient conditions are obtained for the existence of local integral manifolds of autonomous systems of differential equations with impulses at fixed moments. In case of perturbations of the nonlinear part an estimate of the difference between the manifolds is obtained.
Integral manifolds of impulsive differential equations.
Integral Perturbations of Nonlinear Systems of Differential Equations
K problému odezvy atmosféry na malé vnější perturbace