On cohomology and support varieties for Lie superalgebras

Details On cohomology and support varieties for Lie superalgebras On cohomology and support varieties for Lie superalgebras

2010-09-18

arxiv.org/abs/1009.3534v1

Mathematics

Representation Theory

Scientific paper

Support varieties for Lie superalgebras over the complex numbers were introduced in \cite{BKN1} using the relative cohomology. In this paper we discuss finite generation of the relative cohomology rings for Lie superalgebras, we formulate a definition for subalgebras which detect the cohomology, also discuss realizability of support varieties. In the last section as an application we compute the relative cohomology ring of the Lie superalgebra $\overline{S}(n)$ relative to the graded zero component $\overline{S}(n)_0$ and show that this ring is finitely generated. We also compute support varieties of all simple modules in the category of finite dimensional $\overline{S}(n)$-modules which are completely reducible over $\overline{S}(n)_0$.

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