On the permissible percentage of chaotic orbits in various morphological types of galaxies.

During the recent years, a lot of papers have dealt with the triggering and growth of chaotic orbital behaviour in dynamical models of galaxies. A question remains still open: Which is the tolerable percentage of chaotic orbits in self-gravitating equilibrium models describing the various morphologies of observed galaxies? Selected results will be presented as a step towards the understanding of this question. They concern triaxial systems such as barred and elliptical galaxies. [ABSTRACT FROM AUTHOR]