On One Class of Systems of Differential Equations with Periodic Coefficients in Linear Terms.

Under consideration is some class of systems of nonlinear differential equations. The exponentially dichotomous linear part of the systems is assumed to have periodic coefficients. Using the author's criterion of exponential dichotomy, we establish the conditions of existence of periodic solutions and prove stability of the solutions under small perturbations of coefficients in the linear part and nonlinear terms. [ABSTRACT FROM AUTHOR]