In this section we produce several infinite families of nonhomeomorphic
5-manifolds ¯¯¯¯¯¯M with
π1(Diff(¯¯¯¯¯¯M))=π1(Diff(¯¯¯¯¯¯M),Id) infinite. These manifolds are the total space of circle bundles over integral
Kähler surfaces. To give some conte…