2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/169566We prove a multifractal formalism for Birkhoff averages of continuous functions in the case of some non-uniformly hyperbolic maps, which includes interval examples such as the Manneville--Pomeau map.19 pages. We have corrected some typographical errors and clarified a few pointsDynamical Systems37C45; 28A80text