IDEMPOTENT RINGS WHICH ARE EQUIVALENT TO RINGS WITH IDENTITY
Let A be a ring such that A=A2, but which does not necessarily have an identity element. In studying properties of the ring A through prioperties of its modules, it is pointless to consider the category A-MOD of all the left A-modules: for instance, every abelian group ...
- Tsukuba journal of mathematics
Tsukuba journal of mathematics 17(1), 71-76, 1993-06