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arXiv 1111.5335math.RT
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Fock空间II的多项式函子和多项式化

Polynomial functors and categorifications of Fock space II

Jiuzu Hong, Oded Yacobi

摘要:

我们通过多项式函子范畴对对称函数代数上的各种Fock空间表示进行了分类。在前传中,我们利用多项式函子对A型仿射李代数的Fock空间表示进行了分类。在目前的工作中,我们继续从更高的表示论的角度研究多项式函子。首先,我们在多项式函子范畴上对海森堡代数的Fock空间表示进行了分类。其次,构造了特征p > 0的域上的多项式函子导出范畴上仿射李代数的交换作用和Heisenberg代数的水平p作用,从而弱范畴化了$\hat{gl}_p$的Fock空间表示.此外,我们还研究了这些交换与Schur-Weyl对偶之间的关系。对偶性被表述为从多项式函子范畴到线性物种范畴的函子。已知线性物种的范畴带有卡茨-穆迪代数和海森堡代数的作用。我们证明了Schur-Weyl对偶是这些范畴化结构的一个态射。

英文摘要:

We categorify various Fock space representations on the algebra of symmetric functions via the category of polynomial functors. In a prequel, we used polynomial functors to categorify the Fock space representations of type A affine Lie algebras. In the current work we continue the study of polynomial functors from the point of view of higher representation theory. Firstly, we categorify the Fock space representation of the Heisenberg algebra on the category of polynomial functors. Secondly, we construct commuting actions of the affine Lie algebra and the level p action of the Heisenberg algebra on the derived category of polynomial functors over a field of characteristic p > 0, thus weakly categorifying the Fock space representation of $\hat{gl}_p$. Moreover, we study the relationship between these categorifications and Schur-Weyl duality. The duality is formulated as a functor from the category of polynomial functors to the category of linear species. The category of linear species is known to carry actions of the Kac-Moody algebra and the Heisenberg algebra. We prove that Schur-Weyl duality is a morphism of these categorification structures.

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