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math.AG2019
Classification of Lie algebras of differential operators
Helge Øystein Maakestad
In a previous paper we introduced the notion of a D-Lie algebra . A D-Lie algebra is an -Lie-Rinehart algebra with a right -module structure and a ca…
math.AG2019
On the birational invariance of the arithmetic genus and Euler characteristic
Helge Øystein Maakestad
The aim of this note is to use elementary methods to give a large class of examples of projective varieties over a field with the property that $Y…
math.AG2019
The enveloping algebra of a Lie algebra of differential operators
Helge Øystein Maakestad
The aim of this note is to prove various general properties of a generalization of the full module of first order differential operators on a commutative ring - a $\operatorname{D}…