2 papers
math.GT2021
Artin braid groups and spin structures
Gefei Wang
We study the action of the Artin braid group B_{2g+2} on the set of spin structures on a hyperelliptic curve of genus g, which reduces to that of the symmetric group. It has been a…
math.AT2017
A moment-angle manifold whose cohomology is not torsion free
Gefei Wang, Xiaomeng Li
In this paper we give a method to construct moment-angle manifolds whose cohomologies are not torsion free. We also give method to describe the corresponding simplicial sphere by i…