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arXiv 0908.1164math.DGmath.CV
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复李超群与齐次可裂超流形

On Complex Lie Supergroups and Homogeneous Split Supermanifolds

E. G. Vishnyakova

摘要:

众所周知,实李超群的范畴等价于所谓的(实)Harish-Chandra对的范畴。这意味着一个李超群只依赖于底层李群和它的李超代数,并满足一定的相容条件。更精确地说,李超群的结构层和超群态射可以用相应的李超代数来明确描述。本文在复解析情形下给出了这个结果的一个证明。进一步,如果$(G,\mathcal{O}_G)$是一个复李超群,$H\subset G$是一个闭李群,即它是$(G,\mathcal{O}_G)$的一个李子超群,并且它的奇维数为零,我们证明了相应的齐次超流形$(G/H,\mathcal{O}_{G/H})$是可裂的.特别地,任何复李超群都是分裂的超流形。众所周知,复齐次超流形可以是非分裂的。本文给出了复齐次超流形可裂的充要条件。

英文摘要:

It is well known that the category of real Lie supergroups is equivalent to the category of the so-called (real) Harish-Chandra pairs. That means that a Lie supergroup depends only on the underlying Lie group and its Lie superalgebra with certain compatibility conditions. More precisely, the structure sheaf of a Lie supergroup and the supergroup morphisms can be explicitly described in terms of the corresponding Lie superalgebra. In this paper, we give a proof of this result in the complex-analytic case. Furthermore, if $(G,\mathcal{O}_G)$ is a complex Lie supergroup and $H\subset G$ is a closed Lie subgroup, i.e. it is a Lie subsupergroup of $(G,\mathcal{O}_G)$ and its odd dimension is zero, we show that the corresponding homogeneous supermanifold $(G/H,\mathcal{O}_{G/H})$ is split. In particular, any complex Lie supergroup is a split supermanifold. It is well known that a complex homogeneous supermanifold may be non-split. We find here necessary and sufficient conditions for a complex homogeneous supermanifold to be split.

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