K Al-Zoubi, S Al-Kaseasbeh - arXiv preprint arXiv:2008.06886, 2020 - arxiv.org
Let $ G $ be a group with identity $ e $. Let $ R $ be a $ G $-graded commutative ring, $ M $
a graded $ R $-module and $ A\subseteq h (R) $ a multiplicatively closed subset of $ R $. In …