“…These kinds of processes naturally occur in control theory, biology, optimization theory, medicine, and so on (see [6,10,28,36]). The theory of impulsive differential equations has recently received considerable attention, see [2,3,6,30,33,39]. There has been increasing interest in the investigation for boundary value problems of nonlinear impulsive differential equations during the past few years, and many works have been published about the existence of solutions for second-order impulsive differential equations.…”