CR四面体的体积函数
A Volume Function for CR Tetrahedra
摘要:
我们定义了一个体积函数的四个点的配置在3-球下是不变的作用下的PU(2,1),自同构群的CR结构定义在球上通过其嵌入到复杂的2-空间。我们表明,体积函数,构造使用适当的组合的dilogathm功能的布洛赫-魏格纳,满足五项关系在更一般的情况下,其中包括在同一时间CR和真正的双曲几何。
英文摘要:
We define a volume function on configurations of four points in the 3-sphere which is invariant under the action of PU(2,1), the automorphism group of the CR structure defined on the sphere by its embedding in complex 2-space. We show that the volume function, constructed using appropriate combinations of the dilogathm function of Bloch-Wigner, satisfies a five term relation in a more general context which includes at the same time CR and real hyperbolic geometry.
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