The r-function of the Kadomstev-Petviashvili (KP) hierarchy can be written in the generalized Wronskian determinant form, in which the generating functions satisfy a couple of linear differential equations.

• Kadomstev-Petviashvili(KP)系列的r-函数能够表示成生成函数的广义Wronskian行列式；这里的生成函数满足一组线性偏微分方程.