2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/186439We discuss black hole and black string solutions in d=5 Einstein-Yang-Mills theory with negative cosmological constant, proposing a method to compute their mass and action. The magnetic gauge field of these configurations does not vanish at infinity. We argue that this implies a nonvanishing trace for the stress tensor of the dual d=4 theory.8 pages, 2 figuresHigh Energy Physics - Theorytext