本文通过对已识别拉氏乘子法的初步探讨，指出了已识别拉氏乘子法是变分原理中泛函变换的统一方法。

Based on a preliminary study on the identified multiplier method, it is pointed out in this paper that this method is a unite method of functional transformation in variational principle.

youdao

本文是关于非线性响应理论的文章的前半部分。由闭路格林函数的生成泛函的展开式及闭路格林函数的变换关系导出非线性响应的一般表示式。

By using the generating functional and the transformations for different forms of the closed time path Green's functions, the general equations on nonlinear response are derived.

youdao