RT Journal Article
T1 Algèbres de Lie rigides dont le nilradical est filiforme
A1 Goze, Michel
A1 Ancochea Bermúdez, José María
AB In this article the authors study filiform nilpotent Lie algebras n which possess a given torus T of semisimple derivations. The solvable Lie algebras obtained by a semidirect product T⊕n depend, up to isomorphism, on one or many parameters (continuous family) or zero parameters (rigid object). When the dimension n of n grows, the number of Jacobi relations increases faster than the number of structure constants and the parameters, on which depend the continuous families for n, satisfy new equations for n+1. This phenomenon, well known since an example given by F. Bratzlavsky [J. Algebra 30 (1974), 305–316;  is at the origin of the existence of the rigid Lie algebras which have nonvanishing second adjoint cohomology group. This paper gives new examples of such algebras, thus confirming the frequency of this phenomenon. The authors propose as well the first example of a rigid Lie algebra with nonrational structure constants.
PB Elsevier
SN 0764-4442
YR 1991
FD 1991
LK https://hdl.handle.net/20.500.14352/58439
UL https://hdl.handle.net/20.500.14352/58439
LA eng
DS Docta Complutense
RD 8 may 2024