ON A PROBLEM OF PETRICH AND REILLY
Xiangzhi Kong · Journal of Mathematics · 2007
In this paper, we consider an open problem of M. Petrich and N.R.Reilly: Is the operator of lower global relation a complete homomorphism? By using congruences on a Clifford semigroup, we get that, in general, the operator is not a ∩-homomorphism. Therefore the problem is solved.