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Extensions of modules over Weyl algebras
Author(s):
S.
C.
Coutinho
Journal:
Trans. Amer. Math. Soc.
349
(1997),
3343-3352.
MSC (1991):
Primary 16S32;
Secondary 16E30, 13N10
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Abstract:
In this paper we calculate some  groups of singular modules over the complex Weyl algebra  . In particular we determine conditions under which  is an infinite dimensional vector space when  or  .
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Additional Information:
S.
C.
Coutinho
Affiliation:
Instituto de Matemática, Universidade Federal do Rio de Janeiro, P.O. Box 68530, 21945-970, Rio de Janeiro, RJ, Brazil
Email:
collier@impa.br
DOI:
10.1090/S0002-9947-97-01901-6
PII:
S 0002-9947(97)01901-6
Keywords:
Weyl algebra,
${\mathcal{D}}$-module,
characteristic variety,
$\mathrm{Ext}$-groups
Received by editor(s):
February 22, 1996
Copyright of article:
Copyright
1997,
American Mathematical Society
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