2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/119258In this paper we explicitly determine the derivation algebra, automorphism group of quasi $Q_n$-filiform Lie algebras, and applying some properties of root vector decomposition we obtain their isomorphism theorem.18 pagesRings and Algebras17B05, 17B30Quasi $Q_n$-filiform Lie algebrastext