a1 Department of Mathematics, Florida Atlantic University, Boca Raton, FL 33431. U.S.A.
a2 Department of Mathematics, University of Kansas, Lawrence, KS 60045. U.S.A.
We prove that the relation type of all high powers of an ideal in a Noetherian ring is either one or two. It is one exactly when some power of the ideal is locally principal.
(Received January 25 1993)