RT Book, Section T1 Lie algebras obtained as extensions by derivations of the nilpotent algebra L5,3 A1 Ancochea Bermúdez, José María A1 Campoamor Stursberg, Otto-Rudwig A1 García Vergnolle, Lucía AB For the only quasi-filiform Lie algebra L5,3 admitting a Levi factor in its Lie algebra of derivations, the extensions by derivations are classified over C and R. Moreover, the invariants of these extensions are computed. PB Universidad Complutense de Madrid SN 978-84-695-4421-1 YR 2012 FD 2012 LK https://hdl.handle.net/20.500.14352/45356 UL https://hdl.handle.net/20.500.14352/45356 LA eng NO Ministerio de Ciencia, Innovación y Universidades (España) DS Docta Complutense RD 25 feb 2026