2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/223054In this short note, we give a description of the Parry-Sullivan number of a graph in terms of the cycles in the graph. This tool is occasionally useful in reasoning about the Parry-Sullivan numbers of graphs.6 pagesCombinatorics05C50; 05C10A description of the Parry-Sullivan number of a graph using circuitstext