In this article we apply formal matrices technique to get a equivalent proposition of Li Shanian identity, and hence give an elementary proof for Li Shanlan identity.
本文应用形式矩阵的计算技巧，得到李善兰恒等式的一个等价命题，进而给出李善兰恒等式的一个初等证明。
This research paper of proposition logic algebra in the said, on the basis of the solution of equations by polynomial, propositional formula for equivalent conversion and deductive reasoning.
在对命题逻辑代数化表示的基础上，通过解多项式方程组，对命题公式进行等价转换、演绎推理。
In the first part of this paper, we gave several different definition of convex functions and equivalent proposition.
本文首先归纳总结了凸函数的几个不同的定义，并说明其等价性。
In the first part of this paper, we gave several different definition of convex functions and equivalent proposition.
本文首先归纳总结了凸函数的几个不同的定义，并说明其等价性。
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