1. Some references indicated that the extremum in the Schrodinger variational principle is a minimum. 已有的一些文献指出，薛定谔变分原理中的极值是极小值。
2. Meanwhile, the differences between the conditional extremum and unconditional extremum in concept and evaluation are pointed. 同时还指出了条件极值和无条件极值在概念上及求法上的一些区别。
3. In the teaching of probability and statistics, the parameters estimation of linear regression is given by the method of the extremum of function. 概率论与数理统计教学中，线性回归分析参数估计一般都是采用多元函数求极值的方法。
英英解释
n.
1. the point located farthest from the middle of something
2. the most extreme possible amount or value
