Mathematics – K-Theory and Homology
Scientific paper
2004-04-06
E.Vinberg (ed.) Lie groups and invariant theory, A.L.Onishchik Festschrift, Amer.Math.Soc.Transl.Ser.2, 213, Amer.Math.Soc., P
Mathematics
K-Theory and Homology
Scientific paper
The space of Lie algebra cohomology is usually described by the dimensions of components of certain degree even for the adjoint module as coefficients when the spaces of cochains and cohomology can be endowed with a Lie superalgebra structure. Such a description is rather imprecise: these dimensions may coincide for cohomology spaces of distinct algebras. We explicitely describe the Lie superalgebras on the space of cohomology of the maximal nilpotent subalgebra of any simple finite dimensional Lie algebra. We briefly review related results by Grozman, Penkov and Serganova, Poletaeva, and Tolpygo. We cite a powerful Premet's theorem complementary to the Borel-Weil-Bott theorem. We mention relations with the Nijenhuis bracket and nonholonomic systems.
Lebedev Alexei
Leites Dimitry
Shereshevskii Ilya
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