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A Kähler structure for the $$\text {PU}(2, 1)$$ PU ( 2 , 1 ) configuration space of four points in $$S^3$$ S 3
Geometriae Dedicata ( IF 0.5 ) Pub Date : 2021-05-25 , DOI: 10.1007/s10711-021-00630-1
Ioannis D. Platis , Li-Jie Sun

We show that an open subset \({\mathfrak {F}}_4''\) of the \(\mathrm{PU}(2,1)\) configuration space of four points in \(S^3\) is in bijection with an open subset of \({\mathfrak {H}}^{\star }\times {\mathbb {R}}_{>0}\), where \({\mathfrak {H}}^\star \) is the affine-rotational group. Since the latter is a Sasakian manifold, the cone \({\mathfrak {H}}^\star \times {\mathbb {R}}_{>0}\) is Kähler and thus \({\mathfrak {F}}_4''\) inherits this Kähler structure.



中文翻译:

在$$ S ^ 3 $$ S 3中有四个点的$$ \ text {PU}(2,1)$$ PU(2,1)配置空间的Kähler结构

我们显示\(S ^ 3 \)中四个点的\(\ mathrm {PU}(2,1)\)配置空间的一个开放子集\ {{\ mathfrak {F}} _ 4''\是与\({\ mathfrak {H}} ^ {\ star} \ times {\ mathbb {R}} _ {> 0} \)的开放子集进行双射,其中\({\ mathfrak {H}} ^ \星号\)是仿射旋转群。由于后者是Sasakian流形,因此圆锥\({\ mathfrak {H}} ^ \ star \ times {\ mathbb {R}} _ {> 0} \)为Kähler,因此\({\ mathfrak {F} } _4''\)继承了此Kähler结构。

更新日期:2021-05-26
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