A proof based on the fundamental theorem has no counterpart for functions of several variables . 根据基本定理的证明对于多元函数就没有相似的东西。
A note on differentiation for functions of several variables 多元函数微分法的一点注记
New method of extreme value of function of several variables 多元函数极值的一种新方法
Several notable problems in the teaching of function of several variables 多元函数教学中应注意的几个问题
The above improvement procedures were tested with functions of several variables and multi optimum solutions and they performed well 采用具有多变量和多优化值的测试函数对上述改进算法进行测试的结果表明所提出措施的有效性。