利用Liouville变换,得到弦方程密度函数的1/4次幂的朗斯基行列式与弦方程特征函数之间的关系,从而确定了弦方程的密度函数.
By the Liouville transformation,the relationship between Wronskian determinant of a quarter of the power of density function and eigenfunction of string equations is obtained,so as to determine the density function for the string equation.