Central units of the integral group ring $\mathbb {Z}A_5$
Central units of the integral group ring $\mathbb {Z}A_5$
There are very few cases known of nonabelian groups $G$ where the group of central units of $\mathbb { Z}G$, denoted $Z(U(\mathbb { Z}G))$, is nontrivial and where the structure of $Z(U(\mathbb { Z}G))$, including a complete set of generators, has been determined. In this note, we show that the …