2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/188912We study cosmological dynamics of a flat Randall-Sundrum brane with a scalar field and a negative "dark radiation" term. It is shown that in some situations the "dark radiation" can mimic spatial curvature and cause a chaotic behavior which is similar to chaotic dynamics in closed Universe with a scalar field.10 pages, no figures; references addedGeneral Relativity and Quantum CosmologyChaotic Dynamicstext