Q-polynomial expansion for Brézin-Gross-Witten tau-function

Q-polynomial expansion for Brézin-Gross-Witten tau-function
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Brézin-Gross-Witten tau 函数的 Q 多项式展开

DOI:
10.1016/j.aim.2022.108456
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发表时间:
2021
影响因子:
1.7
通讯作者:
Chenglang Yang
Chenglang Yang
中科院分区:
数学1区
文献类型:
--
作者:
Xiaobo Liu;Chenglang Yang

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本文证明了Alexandrov的一个猜想:广义Brézin-Gross-维滕τ-函数在重标度后是BKP族的超几何τ函数.特别是,这表明,原来的BGW tau函数,它具有枚举几何解释,可以表示为一个线性组合的舒尔Q多项式与简单的系数。
In this paper, we prove a conjecture of Alexandrov that the generalized Brézin-Gross-Witten tau-functions are hypergeometric tau functions of BKP hierarchy after re-scaling. In particular, this shows that the original BGW tau-function, which has enumerative geometric interpretations, can be represented as a linear combination of Schur Q-polynomials with simple coefficients.