23 citations · 24 across the 2 of their papers we have counts for
4 papers
The ranks of homotopy groups of Kac-Moody groups
Zhao Xu-an, Jin Chunhua
Let be a Cartan matrix and be the Kac-Moody group associated to Cartan matrix . In this paper, we discuss the computation of the rank of homotopy group $π_k(G(A…
BF Theory Explanation of the Entropy for Non-rotating Isolated Horizons
Jingbo Wang, Yongge Ma, Xu-An Zhao
We consider the nonrotating isolated horizon as an inner boundary of a four-dimensional asymptotically flat spacetime region. Due to the symmetry of the isolated horizon, it turns…
Polynomial invariants of Weyl groups for Kac-Moody groups
Zhao Xu-an, Jin Chunhua
In this paper, we prove that the ring of polynomial invariants of the Weyl group for an indecomposable and indefinite Kac-Moody Lie algebra is generated by invariant symmetric bili…
A Geometric Definition Of Schubert Polynomials and Dual Schubert Polynomials For Classical Lie Groups
Zhao Xu-an, Gao Hongzhu
In this paper, we first discuss the topological properties of projective Stiefel manifolds, we compute their cohomology rings and classify their cohomology endomorphisms; Then by e…