%0 Journal Article %A Ancochea Bermúdez, José María %A Campoamor Stursberg, Otto-Rudwig %T On certain families of naturally graded Lie algebras %D 2002 %@ 0022-4049 %U https://hdl.handle.net/20.500.14352/58406 %X In this work large families of naturally graded nilpotent Lie algebras in arbitrary dimension and characteristic sequence (n; q; 1) with n ≡ 1(mod 2) satisfying the centralizer property are given. This centralizer property constitutes a generalization, for any nilpotent algebra, of the structural properties characterizing the Lie algebra Qn. By considering certain cohomological classes of the space H2(g;C), it is shown that, with few exceptions, the isomorphism classes of these algebras are given by central extensions of Qn by Cp which preserve the nilindex and thenatural graduation. %~