2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/71093In this note, we investigate how different fundamental groups of presentations of a fixed algebra $A$ can be. For finitely many finitely presented groups $G_i$, we construct an algebra $A$ such that all $G_i$ appear as fundamental groups of presentations of $A$.13 pages, xy-pic diagramsRings and Algebras16G20text