2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/69767k-graphs are higher-rank analogues of directed graphs which were first developed to provide combinatorial models for operator algebras of Cuntz-Krieger type. Here we develop a theory of the fundamental groupoid of a k-graph, and relate it to the fundamental groupoid of an associated graph called the 1-skeleton. We also explore the failure, in general, of k-graphs to faithfully embed into their fundamental groupoids.12 pagesCombinatoricsOperator Algebras05C20 (Primary); 18D99 (Secondary)text