By using nonstandard analysis, we define new generalized functions as discrete functions, and their derivatives are defined as differencequotients.
在非标准分析框架下，用离散函数定义新广义函数，用差商定义其导数。
2
The relation between noncentral differencequotients convergence and derivative was discussed by drawing the concept of noncentral differencequotients convergence in this paper.