发表机构
University of Zagreb(萨格勒布大学)
机构由 AI 辅助整理,请以论文原文为准。AI 中文总结
本文为 $B_2^{(1)}$ 标准模的 Feigin-Stoyanovsky 子空间建立特征递推,给出显式多项式系数,证明唯一性,并在水平 1 求解得到费米子公式,且与 $A_1^{(1)}$ 模的生成函数关联。
AI 中文摘要
我们获得了标准 $B_2^{(1)}$-模在固定水平下 Feigin-Stoyanovsky 型子空间的正式特征的递推关系。这些递推直接由差分和初始条件所描述的组合基导出。与 $A_\ell^{(1)}$ 型不同,右侧通常涉及多个平移特征。我们给出了显式的多项式系数,并证明了所得系统连同常数项归一化唯一地确定固定水平下的所有正式特征。在水平 $1$ 时,我们显式求解递推系统,并得到所有三个特征的费米子公式。我们还将这些特征与参数化标准 $A_1^{(1)}$-模的 Meurman-Primc 单项式基的指数三元组的多重生成函数联系起来。
英文摘要
We obtain recurrence relations for formal characters of Feigin-Stoyanovsky type subspaces of standard $B_2^{(1)}$-modules at fixed level. The recurrences are derived directly from the combinatorial bases described by difference and initial conditions. Unlike in type $A_\ell^{(1)}$, the right side in general involves several shifted characters. We give explicit polynomial coefficients and prove that the resulting system, together with the constant term normalization, determines all formal characters at fixed level uniquely. At level $1$ we solve the recurrence system explicitly and obtain fermionic formulas for all three characters. We also relate these characters to the multigraded generating functions for exponent triples parametrizing the Meurman-Primc monomial basis of standard $A_1^{(1)}$-modules.
Comments14 pages