25 citations · 36 across the 11 of their papers we have counts for
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math.GT2018★ 4 cited
Some remarks on the chord index
Zhiyun Cheng, Hongzhu Gao, Mengjian Xu
In this paper we discuss how to define a chord index via smoothing a real crossing point of a virtual knot diagram. Several polynomial invariants of virtual knots and links can be…
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…