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ANALOGUES OF CENTRALIZER SUBALGEBRAS FOR FIAT 2-CATEGORIES AND THEIR 2-REPRESENTATIONS

Part of: Lie algebras and Lie superalgebras Representation theory of rings and algebras Categories with structure

Published online by Cambridge University Press:  04 December 2018

Marco Mackaay Open the ORCID record for Marco Mackaay [Opens in a new window] ,
Volodymyr Mazorchuk Open the ORCID record for Volodymyr Mazorchuk [Opens in a new window] ,
Vanessa Miemietz  and
Xiaoting Zhang Open the ORCID record for Xiaoting Zhang [Opens in a new window]
Marco Mackaay
Affiliation:
Center for Mathematical Analysis, Geometry, and Dynamical Systems, Departamento de Matemática, Instituto Superior Técnico, 1049-001Lisboa, Portugal Departamento de Matemática, FCT, Universidade do Algarve, Campus de Gambelas, 8005-139Faro, Portugal ([email protected])
Volodymyr Mazorchuk
Affiliation:
Department of Mathematics, Uppsala University, Box. 480, SE-75106, Uppsala, Sweden ([email protected])
Vanessa Miemietz
Affiliation:
School of Mathematics, University of East Anglia, NorwichNR4 7TJ, UK ([email protected])
Xiaoting Zhang
Affiliation:
Department of Mathematics, Uppsala University, Box. 480, SE-75106, Uppsala, Sweden ([email protected])
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Abstract

The main result of this paper establishes a bijection between the set of equivalence classes of simple transitive 2-representations with a fixed apex ${\mathcal{J}}$ of a fiat 2-category $\mathscr{C}$ and the set of equivalence classes of faithful simple transitive 2-representations of the fiat 2-subquotient of $\mathscr{C}$ associated with a diagonal ${\mathcal{H}}$-cell in ${\mathcal{J}}$. As an application, we classify simple transitive 2-representations of various categories of Soergel bimodules, in particular, completing the classification in types $B_{3}$ and $B_{4}$.

Keywords

2-categorysimple transitive 2-representationGreen relationscoalgebra 1-morphismcotensor product

MSC classification

Primary: 18D05: Double categories, $2$-categories, bicategories and generalizations
Secondary: 16G99: None of the above, but in this section 17B99: None of the above, but in this section
Type
Research Article
Information
Journal of the Institute of Mathematics of Jussieu , Volume 19 , Issue 6 , November 2020 , pp. 1793 - 1829
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Copyright
© Cambridge University Press 2018

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