Iterated power intersections of ideals in rings of iterated differential polynomials II

Abstract

This paper is a continuation of a previous work by the author and G. Puninski where iterated intersections of powers of ideals were studied in rings of iterated differential polynomials. We present a method which can be used to show that for every proper ideal $I$ of a suitable ring of iterated differential polynomials almost all iterated intersections of powers of $I$ have to be zero. The setback of the method is that it works only if the derivations used in the construction of the ring of iterated differential polynomials satisfy additional assumptions. On the other hand, it can be applied in cases which were not covered by the aforementioned work, for example for a universal enveloping algebra of a completely solvable Lie algebra over a field of positive characteristic.