2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/221044Let $R$ be a ring and $S=R[x;σ,δ]$ its Ore extension. We prove under some conditions that $R$ is a quasi-Baer ring if and only if the Ore extension $R[x;σ,δ]$ is a quasi-Baer ring. Examples are provided to illustrate and delimit our results.8 pagesRings and Algebrastext