2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/105039We determine the irreducible weight modules with weight multiplicities at most 1 over the derivation algebra of the localization of the quantum plane at q=-1.LaTeX, 8 pages. To appear in Comm. AlgQuantum AlgebraRepresentation Theory17B10; 17B37; 17B65; 17B68Representations of the Derivation Algebra of the Localization of the Quantum Plane at q=-1text