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
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.
APA:
Knop, F. (2006). Graded cofinite rings of differential operators. Michigan Mathematical Journal, 54(1), 3-23. https://dx.doi.org/10.1307/mmj/1144437435
MLA:
Knop, Friedrich. "Graded cofinite rings of differential operators." Michigan Mathematical Journal 54.1 (2006): 3-23.
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