Mathematics – Differential Geometry
Scientific paper
2009-08-08
Transformation groups, Vol. 16, Issue 1 (2011), P. 265 - 285
Mathematics
Differential Geometry
Version 3 - exposition expanded, references added, 24 pages
Scientific paper
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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