Graded cofinite rings of differential operators

Knop F (2006)

Publication Language: English

Publication Status: Published

Publication Type: Journal article, Original article

Publication year: 2006


Book Volume: 54

Pages Range: 3-23

Journal Issue: 1

DOI: 10.1307/mmj/1144437435


We study subrings of a ring of differential operators such that the extension of associated graded rings is finite. We show that up to an automorphism these subrings correspond exactly to uniformly ramified finite morphisms. This generalizes a theorem of Levasseur-Stafford on the generators of the invariants of a Weyl algebra under a finite group.

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How to cite


Knop, F. (2006). Graded cofinite rings of differential operators. Michigan Mathematical Journal, 54(1), 3-23.


Knop, Friedrich. "Graded cofinite rings of differential operators." Michigan Mathematical Journal 54.1 (2006): 3-23.

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