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The Primitive Spectrum and Category ${\mathcal{O}}$ for the Periplectic Lie Superalgebra

Part of: Lie algebras and Lie superalgebras Homological methods

Published online by Cambridge University Press:  16 November 2018

Chih-Whi Chen  and
Kevin Coulembier
Chih-Whi Chen
Affiliation:
Department of Mathematics, Uppsala University, Box 480, SE-75106, Uppsala, Sweden
Kevin Coulembier
Affiliation:
School of Mathematics and Statistics, University of Sydney, Australia Email: kevin.coulembier@sydney.edu.au
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Abstract

We solve two problems in representation theory for the periplectic Lie superalgebra $\mathfrak{p}\mathfrak{e}(n)$, namely, the description of the primitive spectrum in terms of functorial realisations of the braid group and the decomposition of category ${\mathcal{O}}$ into indecomposable blocks.

To solve the first problem, we establish a new type of equivalence between category ${\mathcal{O}}$ for all (not just simple or basic) classical Lie superalgebras and a category of Harish-Chandra bimodules. The latter bimodules have a left action of the Lie superalgebra but a right action of the underlying Lie algebra. To solve the second problem, we establish a BGG reciprocity result for the periplectic Lie superalgebra.

Keywords

Harish-Chandra bimodulesperiplectic Lie superalgebratwisting functorscompletion functorsprimitive spectrumcategory Oblock decomposition

MSC classification

Primary: 16E30: Homological functors on modules (Tor, Ext, etc.)
Secondary: 17B10: Representations, algebraic theory (weights)
Type
Article
Information
Canadian Journal of Mathematics , Volume 72 , Issue 3 , June 2020 , pp. 625 - 655
Copyright
© Canadian Mathematical Society 2018

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Footnotes

1

Present address: School of Mathematical Sciences, Xiamen University, Xiamen 361005, China Email: chihwhichen@xmu.edu.cn

The first author is supported by Vergstiftelsen, and the second author is supported by ARC grant DE170100623.

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