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math.AT2018★ 1 cited
The rational cohomology Hopf algebra of a generic Kac-Moody group
Xu-an Zhao, Hongzhu Gao
In this paper we determine the rational homotopy type of the classifying space of a generic Kac-Moody group by computing its rational cohomology ring. As an application we determin…
math.DG2018
General affine differential geometry of surfaces in affine space , I: the elliptical case
Xu-an Zhao, Hongzhu Gao
In this paper we study the general affine differential geometry of surfaces in affine space . For a regular elliptical surface we define a moving frame of minimal order and ge…