2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/211253We classify Lie n-algebras possessing an invariant lorentzian inner product.10 pages (V2: more details on Section 3 and a new lemma. V3: typos corrected)Representation TheoryHigh Energy Physics - TheoryRings and Algebrastext