Neimark-Sacker Bifurcation in Demand-Inventory Model with Stock-Level-Dependent Demand

Piotr Hachuła, Magdalena Nockowska-Rosiak, Ewa Schmeidel
2017 Discrete Dynamics in Nature and Society  
An analysis of dynamics of demand-inventory model with stock-level-dependent demand formulated as a three-dimensional system of difference equations with four parameters is considered. By reducing the model to the planar system with five parameters, an analysis of one-parameter bifurcation of equilibrium points is presented. By the analytical method, we prove that nondegeneracy conditions for the existence of Neimark-Sacker bifurcation for the planar system are fulfilled. To check the sign of
more » ... e first Lyapunov coefficient of Neimark-Sacker bifurcation, we use numerical simulations. We give phase portraits of the planar system to confirm the previous analytical results and show new interesting complex dynamical behaviours emerging in it. Finally, the economical interpretation of the system is given.
doi:10.1155/2017/8162865 fatcat:ndjk6w47b5b3lgu4s5s2dav2ta