报告人：刘西民（大连理工大学）报告时间：2017年12月2日15：00-16：00报告地点：苏州大学本部维格堂319报告摘要：In this talk, a survey of some topics around some finite group actions on spin 4-manifolds is
 given. Especially by considering the Kirby-Siebenmann invariant and the Rochlin invariant, we get 
a constraint on smooth Z/3-actions on spin 4-manifold.