%0 Journal Article %T Two-sided essential nilpotence %A Esfandiar Eslami %A Patrick Stewart %J International Journal of Mathematics and Mathematical Sciences %D 1992 %I Hindawi Publishing Corporation %R 10.1155/s0161171292000449 %X An ideal I of a ring A is essentially nilpotent if I contains a nilpotent ideal N of A such that J бщ N бщ бы 0 whenever J is a nonzero ideal of A contained in I. We show that each ring A has a unique largest essentially nilpotent ideal EN(A). We study the properties of EN(A) and, in particular, we investigate how this ideal behaves with respect to related rings. %K essential ideal %K nilpotent ideal %K free normalizing extension %K crossed product %K Morita equivalent %K fixed ring. %U http://dx.doi.org/10.1155/S0161171292000449