English

Category $\mcal O$ for polynomial toroidal algebras and its subalgebras

Representation Theory 2026-04-15 v2

Abstract

In this paper we study Category \mcalO\mcal O for the polynomial toroidal Lie algebras and its S,HS,H type subalgebras. We classify irreducible objects of category \mcalO\mcal O as unique irreducble quotient of standard modules. Surprisingly, costandard objects of category \mcalO\mcal O arrises from Shen-Larsson type modules. We determine necessary sufficient conditions for irreducibility of Shen-Larsson modules. Finally appeling structure of Shen-Larsson modules and Soergel Tilting module theory of \cite{Soe}, we compute charcter formulas for irreducible modules and indecomposable Tilting modules of category \mcalO\mcal O.

Keywords

Cite

@article{arxiv.2604.10764,
  title  = {Category $\mcal O$ for polynomial toroidal algebras and its subalgebras},
  author = {Priyanshu Chakraborty},
  journal= {arXiv preprint arXiv:2604.10764},
  year   = {2026}
}

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