2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/113997We classify graph C*-algebras, namely, Cuntz-Krieger algebras associated to the Bass-Hashimoto edge incidence operator of a finite graph. This is done by a purely graph theoretical calculation of the K-theory and the position of the unit therein.16 pages, 5 figures; v2: some changes in the proofsOperator AlgebrasCombinatoricsK-Theory and Homology05C50, 20E08, 46L80text