2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/64132Let A denote the ring of arithmetical functions with unitary convolution, and let V be a finite subset of the positive integers having the property that for every v in V, all unitary divisors of v lie in V. We study the truncation A_V, an artinian monomial quotient of a polynomial ring in finitely many indeterminates, isomorphic to the ``Artinified'' Stanley-Reisner ring C[\bar{Δ(V)}] of a certain simplicial complex Δ(V).27 pages, LaTeX2eCommutative Algebra11A25; 13J05text