DYNAMICAL STRANGENESS AT THE EDGE OF CHAOS

A recently introduced class of dynamical systems, the generalized shif ts, is shown to exhibit both topological chaos, while being metrically ordered, and a phase transition in the framework of the thermodynamic formalism when this is applied to its entropic properties. Therefore, it provides a further example of complex behaviour emerging at the bo rder between order and chaos. Its anomalous dynamical properties are t he result of a strong nonhyperbolicity which,in turn, is a manifestati on of uncomputability in generalized shifts.