2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/90757Given a unitary representation $U$ of an Abelian group $G$ and a subgroup $H$, we characterise the positive operator valued quotient group $G/H$ and covariant with respect to $U$.17 pages (latex2e with amsart.cls and amsmath package)Quantum PhysicsPositive operator valued measures covariant with respect to an Abelian grouptext