2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/106045We recover a result of Iwasawa on the p-adic logarithm of principal units with the use of the value at 1 of p-adic L-functions. We deduce an Iwasawa-like result in the odd part of principal units.Number Theory11R23, 11R18text