2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/47227I discuss two aspects of top-quark physics: V_tb and the top-quark mass. The similarities and differences with bottom and charm physics are emphasized.13 pages, LateX, 7 ps figures included. Presented at the Seventh International Symposium on Heavy Flavor Physics, University of California at Santa Barbara, July 7-11, 1997High Energy Physics - Phenomenologytext