On the generalized Nielsen realization problem
On the generalized Nielsen realization problem
复制标题
关于广义尼尔森实现问题
DOI:
--
复制
发表时间:
2005
期刊:
影响因子:
--
通讯作者:
S. Weinberger
中科院分区:
文献类型:
--
作者:
J. Block;S. Weinberger
The main goal of this paper is to give the first examples of equivariant aspherical Poincare complexes, that are not realized by group actions on closed aspherical manifolds M. These will also provide new counterexamples to the Nielsen realization problem about lifting homotopy actions of finite groups to honest group actions. Our examples show that one cannot guarantee that a given action of a finitely generated group π on Euclidean space extends to an action of � , a group containing π as a subgroup of finite index, even when all the torsion of � lives in π.