Classification of irreducible modules for Bershadsky–Polyakov algebra at certain levels

Thursday August 27th, 2020 Rafael Mrđen 0

Authors: Dražen Adamović, Ana Kontrec Journal of Algebra and its applications (2020), Abstract: We study the representation theory of the Bershadsky-Polyakov algebra . In particular, Zhu algebra of is isomorphic to a certain quotient of the Smith algebra, after changing the Virasoro vector. We classify all modules in the category for the […]

On Zhu’s algebra and C_2–algebra for symplectic fermion vertex algebra SF(d)^+

Thursday August 27th, 2020 Rafael Mrđen 0

Authors: Dražen Adamović, Ante Čeperić Journal of Algebra, Volume 563, 1 December 2020, Pages 376-403, Abstract: In this paper, we study the family of vertex operator algebras , known as symplectic fermions. This family is of a particular interest because these VOAs are irrational and -cofinite. We determine Zhu’s algebra and show that the equality of dimensions of […]

A note on principal subspaces of the affine Lie algebras in types B_l^{(1)}, C_l^{(1)}, F_4^{(1)} and G_2^{(1)}

Thursday August 27th, 2020 Rafael Mrđen 0

Author: Marijana Butorac Communications in Algebra, doi: 10.1080/00927872.2020.1788046 Abstract: We construct quasi-particle bases of principal subspaces of standard modules , where , and  denotes the fundamental weight of affine Lie algebras of type , or of level one. From the given bases we find characters of principal subspaces. Keywords: Affine Lie algebras, combinatorial bases, principal subspaces, quasi-particles, vertex operator algebras

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