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Hochschild cohomology of torus equivariant D-modules

Abstract:
We discuss the Hochschild cohomology of the category of D-modules associated to an algebraic stack. In particular we describe the Hochschild cohomology of the category of torus-equivariant D-modules as the cohomology of a D-module on the loop space of the quotient stack. Finally, we give an approach for understanding the Hochschild cohomology of D-modules on general stacks via a relative compactification of the diagonal. This work is motivated by a desire to understand the support theory (in the sense of [6]) of D-modules on stacks.
Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1093/imrn/rny206

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Institution:
University of Oxford
Division:
MPLS
Department:
Mathematical Institute
Role:
Author
ORCID:
0000-0003-2781-0524
Publisher:
Oxford University Press Publisher's website
Journal:
International Mathematics Research Notices Journal website
Volume:
2020
Issue:
19
Pages:
6391–6420
Publication date:
2018-08-29
Acceptance date:
2018-08-08
DOI:
EISSN:
1687-0247
ISSN:
1073-7928
Language:
English
Pubs id:
pubs:1037503
UUID:
uuid:6ef8316a-0d6c-4a2e-bc88-233797ca6524
Local pid:
pubs:1037503
Source identifiers:
1037503
Deposit date:
2019-08-09

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