2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/50155If Bekenstein's conjectured bound on the microcanonical entropy, S < 2 pi E R, is applied to a closed subsystem of maximal linear size R and excitation energy up through E, it can be violated by an arbitrarily large factor by a scalar field having a symmetric potential allowing domain walls, and by the electromagnetic field modes in a coaxial cable.9 pages, LaTeXHigh Energy Physics - TheoryGeneral Relativity and Quantum Cosmologytext