the paper is concerned with robust stability criteria for takagi- sugeno (t-s) fuzzy systems with distributed delays and time delay in the leakage term. by exploiting a model transformation, the system is converted to one of the neutral delay system. global robust stability result is proposed by a new lyapunov-krasovskii functional which takes into account the range of delay and by making use o...

In this paper, a three dimensional mathematical model for HTLV-1infection with intracellular delay and immune activation delay is investigated.By applying the frequency domain approach, we show that time delays candestabilize the HAM/TSP equilibrium, leading to Hopf bifurcations and sta-ble or unstable periodic oscillations. At the end, numerical simulations areillustrated.

The influence of certain discontinuous delays on the behavior of the solutions of the wave equation is studied.

A special learning process is examined in linear N -firm oligopolies in which the firms adjust their beliefs on the price function adaptively based on predicted and actual prices. It is assumed that the price information is delayed, which results in a system of difference-differential equations. In the case of identical speed of adjustment a complete spectrum analysis is given which leads to de...