File Download
There are no files associated with this item.
Links for fulltext
(May Require Subscription)
- Publisher Website: 10.1016/j.aim.2017.11.023
- Scopus: eid_2-s2.0-85040789813
- WOS: WOS:000423780100009
- Find via
Supplementary
- Citations:
- Appears in Collections:
Article: A vanishing theorem for Dirac cohomology of standard modules
Title | A vanishing theorem for Dirac cohomology of standard modules |
---|---|
Authors | |
Keywords | Dirac cohomology Elliptic representations Graded Hecke algebra Ladder representations Springer correspondence Standard modules |
Issue Date | 2018 |
Citation | Advances in Mathematics, 2018, v. 325, p. 274-311 How to Cite? |
Abstract | This paper studies the Dirac cohomology of standard modules in the setting of graded Hecke algebras with geometric parameters. We prove that the Dirac cohomology of a standard module vanishes if and only if the module is not twisted-elliptic tempered. The proof makes use of two deep results. One is some structural information from the generalized Springer correspondence obtained by S. Kato and Lusztig. Another one is a computation of the Dirac cohomology of tempered modules by Barbasch–Ciubotaru–Trapa and Ciubotaru. We apply our result to compute the Dirac cohomology of ladder representations for type An. For each of such representations with non-zero Dirac cohomology, we associate to a canonical Weyl group representation. We use the Dirac cohomology to conclude that such representations appear with multiplicity one. |
Persistent Identifier | http://hdl.handle.net/10722/327169 |
ISSN | 2023 Impact Factor: 1.5 2023 SCImago Journal Rankings: 2.022 |
ISI Accession Number ID |
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Chan, Kei Yuen | - |
dc.date.accessioned | 2023-03-31T05:29:27Z | - |
dc.date.available | 2023-03-31T05:29:27Z | - |
dc.date.issued | 2018 | - |
dc.identifier.citation | Advances in Mathematics, 2018, v. 325, p. 274-311 | - |
dc.identifier.issn | 0001-8708 | - |
dc.identifier.uri | http://hdl.handle.net/10722/327169 | - |
dc.description.abstract | This paper studies the Dirac cohomology of standard modules in the setting of graded Hecke algebras with geometric parameters. We prove that the Dirac cohomology of a standard module vanishes if and only if the module is not twisted-elliptic tempered. The proof makes use of two deep results. One is some structural information from the generalized Springer correspondence obtained by S. Kato and Lusztig. Another one is a computation of the Dirac cohomology of tempered modules by Barbasch–Ciubotaru–Trapa and Ciubotaru. We apply our result to compute the Dirac cohomology of ladder representations for type An. For each of such representations with non-zero Dirac cohomology, we associate to a canonical Weyl group representation. We use the Dirac cohomology to conclude that such representations appear with multiplicity one. | - |
dc.language | eng | - |
dc.relation.ispartof | Advances in Mathematics | - |
dc.subject | Dirac cohomology | - |
dc.subject | Elliptic representations | - |
dc.subject | Graded Hecke algebra | - |
dc.subject | Ladder representations | - |
dc.subject | Springer correspondence | - |
dc.subject | Standard modules | - |
dc.title | A vanishing theorem for Dirac cohomology of standard modules | - |
dc.type | Article | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1016/j.aim.2017.11.023 | - |
dc.identifier.scopus | eid_2-s2.0-85040789813 | - |
dc.identifier.volume | 325 | - |
dc.identifier.spage | 274 | - |
dc.identifier.epage | 311 | - |
dc.identifier.eissn | 1090-2082 | - |
dc.identifier.isi | WOS:000423780100009 | - |