/manager/Index ${session.getAttribute("locale")} 5 An algebraic approach to lifts of digraphs /manager/Repository/uon:36785 α of a voltage digraph, which has arcs weighted by the elements of a group. As a main result, when the involved group is Abelian, we completely determine the spectrum of Γα. As some examples of our technique, we study some basic properties of the Alegre digraph, and completely characterize the spectrum of a new family of digraphs, which contains the generalized Petersen graphs, and the Hoffman-Singleton graph.]]> Mon 06 Jul 2020 09:53:43 AEST ]]> On factor-invariant graphs with two cycles /manager/Repository/uon:51897 Fri 22 Sep 2023 09:30:35 AEST ]]>