Multiple responses at the boundaries of the vulnerable window in the Belousov-Zhabotinsky reaction

We study vulnerability in the Belousov-Zhabotinsky reaction-using experimental and numerical methods. We show that the width of the vulnerable window (VW) decreases with increasing velocity of wave,propagation. A detailed study of the structure of the VW: revealed a new effect: the development of multiple responses to a single premature stimulus; a single premature stimulation in a homogeneous one-dimensional medium generates two or three propagating waves. We locate this effect in the parametric space and discuss its mechanism.