nuously perturbed bob on a spring above. A sequence of observables over time, in, for example, three dimensional “phase space” (Packard et al, 1980; Takens, 1981; Sauer et al, 1991), is depicted by a curve representing the system’s trajectory at times 4, f, fs, by sliding one-by-one down the series and p

values could be found close together in the limit set. This behavior was called “sensitivity to initial conditions” by David Ruelle (1978; Ruelle and Takens, 19771). It is noteworthy, however, that over a range of values of the parameters, the overall pattern of the orbits of the Lorenz attractor results