Polynomial Tau-Functions for the Multicomponent KP Hierarchy
Polynomial Tau-Functions for the Multicomponent KP Hierarchy
复制标题
多分量 KP 层次结构的多项式 Tau 函数
DOI:
10.4171/prims/58-1-1
复制
发表时间:
2019
影响因子:
1.2
通讯作者:
J. Leur
中科院分区:
文献类型:
--
作者:
V. Kac;J. Leur
In a previous paper we constructed all polynomial tau-functions of the 1-component KP hierarchy, namely, we showed that any such tau-function is obtained from a Schur polynomial $s_\lambda(t)$ by certain shifts of arguments. In the present paper we give a simpler proof of this result, using the (1-component) boson-fermion correspondence. Moreover, we show that this approach can be applied to the s-component KP hierarchy, using the s-component boson-fermion correspondence, finding thereby all its polynomial tau-functions. We also find all polynomial tau-functions for the reduction of the s-component KP hierarchy, associated to any partition consisting of s positive parts.