Altun, Y.Tunç, C.2025-05-102025-05-1020192219-56882-s2.0-85071681547https://hdl.handle.net/20.500.14720/276In this paper, we consider a nonlinear neutral differential system with periodic coefficients and time-varying lag. We obtain new estimates to characterize the exponential decay of solutions of that system at +∞ and depending on the norms of the powers of a constant matrix D. To reach the desirable results, we use a Lyapunov-Krasovskii functional and give an example to show applicability of the constructed assumptions. We also use MATLAB-Simulink to show the behaviors of the paths of the solutions of the system considered in the special case. © Palestine Polytechnic University-PPU 2019.eninfo:eu-repo/semantics/closedAccessDecay RateLyapunov-Krasovskii FunctionalNeutral Differential SystemPeriodic CoefficientTime-Varying LagArticle81N/AQ4105120