Abstract
This paper describes chaos and hyperchaos occurring in two degrees of freedom system using numerical simulations. Hyperchaos occurs only in more than two degrees of freedom systems. And these motions are more complicated than chaos. Poincare maps, Lyapunov spectra and KS Entropy provide the differences between chaos and hyperchaos. It is shown that potential function of the system affects the occurrence of hyperchaos and chaos.
