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1)  convex function of many variables
多元凸函数
1.
From the definition of convex function of many variables and the conclusion in reference,we can get some necessary and sufficient conditions for judging the convexity of function of many variables by directional derivative and limit.
多元凸函数的定义及文献中已有的性质出发,利用方向导数和极限等数学工具,给出了一个判别多元函数凸性的充分必要条件,进一步利用函数f(x)的Hesse矩阵Hf(x)的半正定性来判定函数的凸性。
2)  binary convex function
二元凸函数
1.
This article presents the definition of binary convex function,proves that the binary convex function in open and convex region must be continuous,popularizes Jensen s inequality and establishes the decision theorem of binary convex function.
该文给出了二元凸函数的定义,证明了开凸区域上的二元凸函数必连续,推广了Jensen不等式,建立了二元凸函数的判定定理。
3)  function of several variables
多元函数
1.
In this paper,we discussed the the extremum of function of several variables,and generalized the result of paper[2],Then we give the method of solving the extrme value of n-component function using first class partial derivative.
讨论了多元函数极值的问题,推广了文献[2]的结果,并给出了利用一阶偏导数求多元函数极值的方法。
2.
The teaching of function of several variables is a difficult point in higher mathematics teaching.
多元函数的教学是高等数学教学中的一个难点。
4)  function of many variables
多元函数
1.
The sufficient condition of the extreme value of function of many variables;
多元函数极值判别法推广
2.
Seeking the maximum and minimum of function is the perpetual topic in the medium-sized mathematics,and the function of many variables are difficulties.
求最值问题是中等数学永恒的话题,其中,多元函数求最值是难点。
5)  pluralistic function
多元函数
1.
Then, the approach of establishing rock strength theory using the method by which the extremum is obtained for pluralistic function is discussed according to the concept of yielding or failure of rock and a rock damage statistical strength theory.
在此基础上,根据岩石屈服或破坏的概念,重点探讨了利用多元函数求极值的方法建立岩石强度理论的途径,初步建立了一种新的岩石强度理论即岩石损伤统计强度理论及其建立方法,与实测结果及其它岩石强度理论比较表明,具有明显的优越性。
2.
The differential calculus of the pluralistic function is both the key and difficult point in higher mathematics.
多元函数微分学是高等数学教学的重点和难点之一。
6)  Multivariate functions
多元函数
1.
The sufficient conditions for extreme of multivariate functions;
多元函数取到条件极值的充分条件
2.
In this paper, a convenient judgement method about extreme value of one class multivariate functions—trivariate functions was given, and its application in reality was discussed.
本文给出一类多元函数—三元函数是否存在极值的快速判别方法 ,并讨论它在实际问题中的应用 。
3.
The extreme conditions for the monovariate functions were applied to the multivariate functions and then an effective method to decide the extreme values for the multivariate functions was presented.
将一元函数取极值的一阶充分条件推广到多元,提供了判定多元函数极值的1个有效方法。
补充资料:多元函数
有两个或两个以上自变量的函数。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
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