J Austral Math Soc Ser A 50 pp116--137, 1991.
(Received 17 July 1989; revised 2 January 1990)
We consider the problem of characterizing by abstract properties the rings which are isomorphic to the endomorphism ring End(RF) of some free module F over a ring R in a given class R of rings. We solve this problem when R is any class of rings (by employing topological notions) and when R is the class of all the left Kasch rings (in terms of algebraic properties only).
1980 AMS Subject Classification (1985 Revision): 16A65
Last Modified: Mon Feb 3 9:46:10 2003