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- W4386081639 abstract "In this paper, we consider irreducible quasi-finite (or equivalently weakly integrable) modules, with non-trivial action of the core, over the extended affine Lie algebras (EALAs) whose centerless cores are multiloop algebras. The centerless cores of all but one family of EALAs having nullity greater than 1 are known to admit such multiloop realizations. For any such (untwisted) EALA, we show that the irreducible quasi-finite modules are either integrable with the center of the underlying core acting trivially, or restricted generalized highest weight (GHW) modules. We further prove that in the nullity 2 case, these irreducible restricted GHW modules turn out to be highest weight type modules, thereby classifying the irreducible quasi-finite modules over all such EALAs. In particular, we obtain the classification of irreducible quasi-finite modules over toroidal Lie algebras, minimal EALAs and toroidal EALAs of nullity 2. Along the way, we completely classify the irreducible weakly integrable modules over affine Kac-Moody algebras (studied by Rao-Futorny [Trans. Amer. Math. Soc. 2009] for non-zero level modules). Our results generalize the well-known work of Chari [Invent. Math. 1986] and Chari-Pressley [Math. Ann. 1986] concerning the classification of irreducible integrable modules over (nullity 1) affine Kac--Moody algebras." @default.
- W4386081639 created "2023-08-23" @default.
- W4386081639 creator A5024588352 @default.
- W4386081639 date "2023-08-21" @default.
- W4386081639 modified "2023-09-27" @default.
- W4386081639 title "Quasi-finite modules over extended affine Lie algebras" @default.
- W4386081639 doi "https://doi.org/10.48550/arxiv.2308.10665" @default.
- W4386081639 hasPublicationYear "2023" @default.
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