Existence and uniqueness of (ω, c)−periodic solution of boundary value problem for
a nonlinear system of ordinary differential equations with the quadrate of Gerasimov–Caputo
operator, impulsive effects and maxima are studied. Problem is reduced to solvability of the
complex system of nonlinear functional integral equations. The method of contracted mapping
is used in the proof of one-valued solvability of nonlinear functional integral equations. Some
estimates are obtained for the (ω, c)−periodic solution of the proble