2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/205335Renyi entropies of a black hole are evaluated by counting the states of the Hawking radiation which fills a thin shell surrounding the horizon. The width of the shell is determined from its energy content and the corresponding mass defect. The Bekenstein-Hawking formula for the entropy of the black hole is correctly reproduced.10 pagesGeneral Relativity and Quantum Cosmologytext