In this paper, an economic order quantity (EOQ) inventory model for a deteriorating item is developed with the following characteristics: (i) The demand rate is deterministic and two-staged, i.e., it is constant in first part of the cycle and linear function of time in the second part. (ii) Deterioration rate is time-proportional. (iii) Shortages are not allowed to occur. The o...

Consider the skew product F : T2 → T2, F (x, y) = (f(x), y + τ(x)), where f : T1 → T1 is a piecewise C 1+α expanding map on a countable partition and τ : T1 → R is piecewise C 1. It is shown that if τ is not Lipschitzcohomologous to a piecewise constant function on the joint partition of f and τ , then F is mixing at a stretched-exponential rate.