Department of Mathematics, Baylor University, Waco, Texas 76798 ; Department of Mathematics, Texas A&M University, College Station, Texas 77843
Abstract:
For a torsion-free abelian group , we investigate the problem of determining when is maximal as a ring in the near-ring of all -preserving functions on . We introduce the concept of quasi--locally cyclic groups and determine several properties of these abelian groups.