Quasi-prime ideals in differential rings

1. Introduction. A central notion in commutative ring theory is that of a prime ideal. It seems reasonable, therefore, that the corresponding central notion in differential ring theory should be that of a prime differential ideal, and this has been the case historically [5], [8]. However, a maximal differential ideal in a differential ring may fail to be prime [ 1, page 310]. Moreover, if M is a maximal differzntial idea