function d=Rossler(t,y)
% Rossler(t,y) evaluates the vector field for the Rossler 
% equations (Example 17.1 in Hale & Kocak). lambda=parameter (global).

global parameter
d=[-(y(2)+y(3));y(1)+.2*y(2);.2+y(3)*(y(1)-parameter)];
% M. Day, June 4, 2005
