摘要In this paper, the authors study the homologically trivial symplectic group actions on homotopy elliptic surfaces E(n) and get some rigidity results.
5YANG Qi Lin Institue of Mathematics.Academy of Mathematics and System Sciences.Chinese Academy of Sciences,Beijing 100080,P.R.China E-mail:qlyang@math03.math.ac.cn.Poisson Morphisms and Reduced Affine Poisson Group Actions[J].Acta Mathematica Sinica,English Series,2002,18(2):301-310.