О КОНГРУЭНЦ–КОГЕРЕНТНЫХ АЛГЕБРАХ РИСА И АЛГЕБРАХ С ОПЕРАТОРОМ

The paper contains a classification of congruence-coherent Rees algebras and algebras with an operator. The concept of coherence was introduced by D.Geiger. An algebra A is called coherent if each of its subalgebras containing a class of some congruence on A is a union of such classes. In Section 3 ... View More