RUS  ENG
Full version
JOURNALS // Itogi Nauki i Tekhniki. Sovremennaya Matematika i ee Prilozheniya. Tematicheskie Obzory // Archive

Itogi Nauki i Tekhniki. Sovrem. Mat. Pril. Temat. Obz., 2021 Volume 192, Pages 65–73 (Mi into782)

On bounded solutions of one class of systems of ordinary differential equations

M. M. Kobilzodaa, A. N. Naimovb

a Tajik National University, Dushanbe
b Vologda State University

Abstract: In this paper, we consider a priori estimates and examine the existence of bounded solutions for a class of systems of ordinary differential equations whose right-hand sides have an arbitrary order of growth with respect to the independent and dependent variables. For the right-hand sides of the equations, we find one-sided estimates that provide a priori estimates for bounded solutions; using the methods for calculating the rotation of vector fields and the method of periodic cuts, we are prove theorems on the existence of periodic and bounded solutions.

Keywords: one-sided estimate, bounded solution, periodic solution, a priori estimate, rotation of a vector field.

UDC: 517.927.4

MSC: 34B15, 34B40

DOI: 10.36535/0233-6723-2021-192-65-73



© Steklov Math. Inst. of RAS, 2025