2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/2863Orbital and self-consistent dynamics of non-integrable galaxy models are reviewed. Topics covered include torus construction; resonances; triaxial systems with central singularities; mixing and collisionless relaxation; and chaos in collisional systems.23 pages, 10 postscript figures, uses sussp.sty (included). To appear in B. A. Steves and A. Maciejewski, eds., "The Restless Universe: Applications of Gravitational N-Body Dynamics to Planetary, Stellar and Galactic Systems," Institute of Physics Publishing, Bristol, 2001Astrophysicstext