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arXiv 1206.7017math.DG
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关于复齐次超流形的分裂问题

On the splitting problem for complex homogeneous supermanifolds

E. G. Vishnyakova

摘要:

任何复解析李群$\mathcal{G}$都是分裂的\cite{kosz},即它的结构层同构于某个向量丛的结构层,这是一个经典的结果.然而,确实存在非分裂复解析齐次超流形。研究了如何判定复解析齐次超流形是可裂的还是不可裂的问题。我们的主要结果是用$\mathcal{H}$ -不变量刻画了复解析齐次超流形$\mathcal{G}/\mathcal{H}$上的左不变分次.作为我们研究的一个推论,我们得到了复解析齐次超流形用李代数分裂的一些简单的充分条件。

英文摘要:

It is a classical result that any complex analytic Lie supergroup $\mathcal{G}$ is split \cite{kosz}, that is its structure sheaf is isomorphic to the structure sheaf of a certain vector bundle. However, there do exist non-split complex analytic homogeneous supermanifolds. We study the question how to find out whether a complex analytic homogeneous supermanifold is split or non-split. Our main result is a description of left invariant gradings on a complex analytic homogeneous supermanifold $\mathcal{G}/\mathcal{H}$ in the terms of $\mathcal{H}$-invariants. As a corollary to our investigations we get some simple sufficient conditions for a complex analytic homogeneous supermanifold to be split in terms of Lie algebras.

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