Extensions of modules over Weyl algebras

Coutinho, S.

doi:10.1090/S0002-9947-97-01901-6

Extensions of modules over Weyl algebras
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Trans. Amer. Math. Soc. 349 (1997), 3343-3352 Request permission

Abstract:

In this paper we calculate some $\mathrm {Ext}$ groups of singular modules over the complex Weyl algebra $A_{n}$. In particular we determine conditions under which $\mathrm {Ext}$ is an infinite dimensional vector space when $n =2$ or $3$.

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