2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/65479Let $k$ be a field, and $H$ a Hopf algebra with bijective antipode. If $H$ is commutative, noetherian, semisimple and cosemisimple, then the category ${}_{H}{\mathcal {YD}}^H$ of Yetter-Drinfeld modules is semisimple. We also prove a similar statement for the category of Long dimodules, without the assumption that $H$ is commutative.13 pagesQuantum AlgebraRings and Algebras16W30text