A note on the Nielsen realization problem for Enriques manifolds

Abstract

We give a numerical criterion for the Nielsen realization problem for Enriques manifolds, based on the recent developments on the Birman-Hilden theory for hyper-Kähler manifolds and on Nielsen realization for hyper-Kähler manifolds. We apply the criterion to known examples of Enriques manifolds to get explicit groups that can be realized or not realized, and comment on questions related to the Nielsen realization problem.

Previous Theorem 0.3, Corollary 0.2, and section 4 removed because incorrect