2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/55536We review the structure and symmetry properties of the worldvolume action for the M-theory 5-brane and of its equations of motion.LaTeX file, 14 pages. Invited talk given at the Trieste Conference on Superfivebranes and Physics in 5+1 Dimensions (April 1-3, 1998), and at the 2nd INTAS Meeting ``Fundamental Problems in Classical, Quantum and String Gravity" (Paris, 1--3 May, 1998)High Energy Physics - Theorytext