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arXiv 2109.09050math.QAhep-thmath.RT
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自由场代数的陪集通过弧空间

Cosets of free field algebras via arc spaces

Andrew R. Linshaw, Bailin Song

AI总结:

本文利用弧空间的不变理论,为自由场代数中与Howe对偶相关的仿射顶点代数陪集找到极小强生成集,给出经典自由顶点代数新例,证明次正则W-代数的陪集实现,并提出新的水平-秩对偶。

摘要:

利用弧空间的不变理论,我们为自由场代数内与经典Howe对偶相关的仿射顶点代数的某些陪集找到了极小的强生成集。这些结果有若干应用。首先,对于任何顶点代数 $\mathcal V$,我们有一个微分代数的满同态 $\mathbb{C}[J_{\infty}(X_{\mathcal V})] \rightarrow \text{gr}^F(\mathcal V)$;等价地,$\mathcal V$ 的奇异支撑是伴随概形 $X_{\mathcal V}$ 的弧空间的一个闭子概形。我们给出了许多经典自由顶点代数(即该映射为同构)的新例子,包括对所有正整数 $n$ 和 $k$ 的 $L_k(\mathfrak{sp}_{2n})$。我们还给出了该映射的核非平凡但作为微分理想有限生成的新例子。其次,我们证明了在临界水平下 $\mathfrak{sl}_n$ 的次正则 ${\mathcal W}$-代数的陪集实现,这先前由Creutzig、Gao和第一作者猜想。最后,我们给出了一些涉及仿射顶点超代数的新的水平-秩对偶。

英文摘要:

Using the invariant theory of arc spaces, we find minimal strong generating sets for certain cosets of affine vertex algebras inside free field algebras that are related to classical Howe duality. These results have several applications. First, for any vertex algebra $\mathcal V$, we have a surjective homomorphism of differential algebras $\mathbb{C}[J_{\infty}(X_{\mathcal V})] \rightarrow \text{gr}^F(\mathcal V)$; equivalently, the singular support of $\mathcal V$ is a closed subscheme of the arc space of the associated scheme $X_{\mathcal V}$. We give many new examples of classically free vertex algebras (i.e., this map is an isomorphism), including $L_k(\mathfrak{sp}_{2n})$ for all positive integers $n$ and $k$. We also give new examples where the kernel of this map is nontrivial but is finitely generated as a differential ideal. Next, we prove a coset realization of the subregular ${\mathcal W}$-algebra of $\mathfrak{sl}_n$ at critical level that was previously conjectured by Creutzig, Gao, and the first author. Finally, we give some new level-rank dualities involving affine vertex superalgebras.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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